Institute of Acoustics: Acoustics Bulletin July / August 2022

Acoustics Bulletin July / August 2022

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e e NoiseMap five—— Mapping the way to a quieter future... - + for all types of environmental noise e Standard prediction methods = e Built-in enhancements e Models of any realistic size e Complete all-in-one solution e Contour & individual results stored in database e Compare and combine results e Built-in context-sensitive help e On-line technical support e Printed and video support A rail construction site in London analysed by NoiseMap Click on bullet points to see more, or visit our website: www.noisemap.com email: rogertompsett@noisemap.com a / tel: +44 20 3355 9734 NoiseMa Pa 4 = = a

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FEATURE

IOA MEDALS AND AWARDS entry deadline

The IOA annually honours people whose contributions to acoustics or to the Institute have been particularly noteworthy.

The 2023 IOA medals and awards comprise: • The Rayleigh Medal This is the IOA’s premier award, given to persons of undoubted renown for outstanding contributions to acoustics without regard to age.

he medals and awards programme is wide-ranging in its acknowledgment of academic achievement, practical engineering applications and innovations, student achievement, contributions to the Institute and to the world of science and technology.

• The Tyndall Medal is awarded biannually to a UK acoustician, preferably under the age of 40, for achievement and services in the ﬁ eld of acoustics.

Nomination forms are at https://www.ioa.org.uk/about-us/awards all nominations for 2023 Medals and Awards must be received by 1 October 2022

• The AB Wood Medal (USA/Canada acoustician in 2023) is aimed at researchers aged under 40, whose work is associated with the sea.

Decisions will made by Christmas and the winners will be announced early 2023.

• The RWB Stephens Medal was named after Dr Ray Stephens, the ﬁ rst President of the IOA. It is awarded in odd-numbered years for outstanding contributions to acoustics research or education.

6 ACOUSTICS BULLETIN JULY / AUGUST 2022

• The Peter Lord Award is given annually for a building, project or product that showcases outstanding and innovative acoustic design.

• The Sustainability Award is open to individuals, or teams, who are able to demonstrate and provide evidence of one or more of the following:

2024 Awards

Bob Peters Award IOA Engineering Medal Promoting Acoustics to the Public

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• The Peter Barnett Memorial Award was inaugurated in 2001 by the Electro-acoustics Group, to honour Peter Barnett who died the previous year. This award, which is made annually, recognises advancements and technical excellence in the ﬁ elds of electro-acoustics, speech intelligibility and education in acoustics and electro-acoustics.

* An exemplar contribution towards the delivery of sustainability; * Demonstration of value in all three key areas (societal, economic and environmental) * Demonstration of a signiﬁ cant contribution – through education, design, construction practices or guidance – that promotes the implementation of sustainability through acoustics

• The IOA Young Persons Award for Innovation in Acoustical Engineering (sponsored by Cirrus) is awarded every two years and recognises excellence and achievement in acoustical engineering among those who are aged under 35, or early on in their careers in industry.

This award is given on a rolling basis to those who reach the bar.

• The Award for Distinguished Services to the Institute was introduced so that the IOA could publicly acknowledge the debt owed to individual members who have provided sustained assistance over the years in some way with the running of the Institute.

More information and nomination forms are at https://www.ioa.org.uk/about-us/awards Nominations should be submitted by 1 October 2022 to ioa@ioa.org.uk

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The deadline for nominations for 2023 Medals and Awards is 1 October 2022, and it’s coming up fast. IOA MEDALS AND AWARDS

Don’t miss out, to nominate go to www.ioa.org.uk/about-us/awards

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ACOUSTICS BULLETIN JULY / AUGUST 2022 7

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or construction sites.

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For more information email sales@svantek.co.uk,

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LEARN REMOTELY

Want a qualification that assures you of good job prospects?

The one year Diploma in Acoustics and Noise Control includes the General Principles of Acoustics, Laboratory and Experimental Methods, a project and two specialist modules chosen from: • Building Acoustics • Regulation and Assessment of Noise • Environmental Noise: Measurement, Prediction and Control • Noise and Vibration Control Engineering

Established for more than 40 years, the Institute provides graduates and those with a proven interest in acoustics, the chance to become a recognised member of a vibrant and active global network with regular UK meetings and CPD.

The Diploma is taught in centres across the UK or through distance learning with live tutorials – find out more: www.ioa.org.uk/education-training

FOR MORE INFORMATION:

www.ioa.org.uk E: education@ioa.org.uk T: +44 (0)300 999 9675

Institute of Acoustics, Silbury Court, 406 Silbury Boulevard, Milton Keynes MK9 2AF

Building with conscience.

ACOUSTICS BULLETIN JULY / AUGUST 2022 23

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INSTITUTE AFFAIRS

IOA Events for 2022/3

ANC Awards & Conference 2022

IOA events 2022 Joint event with the University of Salford and UKAN+ Virtual Acoustic Prototyping: methods for predicting noise and vibration in complex structures 17-19 August 2022 University of Salford Research Centre https://bit.ly/VirtualAcousticProto

Don’t forget to enter your projects into the ANC Acoustic Awards 2022 .

These awards are scheduled for 13th October – and now is the time to start thinking about submitting your entries.

Inter-Noise 2022 21-24 August 2022 SECC, Glasgow https://internoise2022.org/

You could be a winner, like these from 2021... www.theanc.co.uk/anc- awards/results-2021/

Organised by the Electroacoustics Group Reproduced Sound 2022 (Auralisation and Personalisation – Beyond Reality) 15-17 November 2022 The Bristol Hotel, Bristol https://reproducedsound.co.uk/

The Awards look for projects which demonstrate delivery of value and quality for the client, go beyond current good practice, justify how any problems were overcome and show creativity and innovation.

Organised by the Musical Acoustics Group New Developments in Musical Acoustics 19 October 2022 Birmingham City University https://www.ioa.org.uk/civicrm/event/info?id=734&reset=1

Size and prestige of the overall project are not significant as these awards recognise the acoustics consultancy within the project.

IOA events 2023 Organised by the Underwater Acoustics Group 5th International Conference on Synthetic Aperture in Sonar and Radar 6-8 September 2023 Villa Marigola, Italy https://www.ioa.org.uk/civicrm/event/info?reset=1&id=718

2022 Categories

• Acoustics for Inclusion (sponsored by Cirrus Research)

• Building Acoustics (sponsored by Getzner)

11th International Conference on Auditorium Acoustics 28-30 September 2023 SNFCC, Athens Greece https://www.ioa.org.uk/civicrm/event/info?reset=1&id=717

• Environmental Noise: Non Infrastructure (sponsored by CDM Stravitec)

• Environmental Noise: Infrastructure (sponsored by ANV Measurement Systems)

Other events 2022 IMA Maths in Music Conference 13-15 July 2022 Royal College of Music London https://ima.org.uk/18115/ima-maths-in-music-conference/

• Innovation (sponsored by AcSoft)

• Vibration Prediction and Control (sponsored by CMS Danskin)

12th Ibero-American Acoustics Congress 28 August-31 September 2022 Florianopolis, Brazil https://www.ﬁ a2022.com.br/ingles/index.php

• Smaller Consultancies

The closing date is midnight on 5th September.

Other events 2023 NOVEM 2021 (Noise and Vibration: Emerging Methods) Now 10-12 January 2023 Auckland, New Zealand www.novem2021.ac.nz

More details will follow on the ANC website: www.theanc.co.uk/anc- awards-2022/

ACOUSTICS & NOISE CONSULTANTS

Acoustics 2023 International Convention Centre Sydney (ICC Sydney) 4-8 December 2023 https://acoustics23sydney.org/

For up-to-date information visit www.ioa.org.uk

ACOUSTICS BULLETIN JULY / AUGUST 2022 25

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Inter-noise 2022 Buddy Scheme

nr | inter.noise 21-24 AUGUST SCOTTISH EVENT CAMPUS ? O ? Z GLASGOW

Nervous about attending Inter-noise 2022? Or keen to help people that are?

The IOA, EDIWG and ECG are putting together a Buddy Scheme for Inter-noise 2022. This scheme is to enable people who are not confident about attending the conference (‘buddies’) to have a point of contact (‘mentor’) throughout the conference, starting with the breakfast on the first day.

according to language requirements and specialist acoustic interests, if desired. Registration details for buddies and mentors are being finalised and will be communicated by email from In Conference Ltd, the conference organising company, to people registered for the conference.

Each mentor will be grouped with two buddies. Where possible, buddies and mentors will be grouped

For more information please visit: http://internoise2022.org/buddy-scheme

In Conference Ltd. Unit 1, Q Court, Quality Street, Edinburgh, EH4 5BP

Tel: +44 (0) 131 336 4203 Email: internoise2022@in-conference.org.uk

https://internoise2022.org/

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world with HSP 2 . He is also Chair of the HSP Support Group 3 , a charity disability 4 and a member of the IOA EDI working group 5 .

the UK Equality Act 2010 1 which

SonaSpray fcx in the Hard Rock Hotel, London. Our experience over the years teaches us that architecture & interior design are so much more than just looks. We consider every factor with each project we work on & acoustics is no exception. We knew we needed a premium acoustic product that would also work with our designs, which is why we chose Oscar Acoustics. David Mason, Director of Scott Brownrigg Architects. OSCAR acoustics

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INTER-NOISE COVER STORY

The 51st International Congress and Exposition on Noise Control Engineering will be held at the Scottish Event Campus (SEC) in Glasgow on 21-24 August 2022. Inter-noise 2022

Inter-noise 2022 oﬀ ers: • International perspectives on noise control – Inter-noise is one of the biggest international conferences on noise control engineering, with 800 paper presentations to attract scientists, engineers and consultants from around the world. • Prominent topics – showcase your research and learn from your peers in plenary sessions, symposia, poster presentations, workshops and professional training on 20 main topic areas including building noise control and architectural acoustics, transportation noise and vibration, environmental noise, and many more. • Grow your network – with 800 delegates attending in person, reconnect and meet people in your specialism from all over the world. • Develop solutions – meet with our 30+ exhibitors to learn about the latest on the market in noise control. • The opportunity to visit Glasgow – voted as place for the ‘Best UK City Break in 2021’ by Condé Nast Traveller.

Maria Heckl

Keynote speakers Professor Lily Wang

The Salford Group: Professor Andy Moorhouse, Dr Andy Elliott and Dr Josh Meggitt

Presentation title: Sustainable combustion technologies need acoustics research.

Jin Yong Jeon

Presentation title: Linking indoor acoustic conditions to human wellbeing and performance.

Presentation title: Virtual acoustic prototypes – a story of four decades.

Dr Yu Liu

Professor Bridget Shield MBE

Presentation title: Soundscape and digital therapeutics: psycho- physiological restoration.

Presentation title: A sound environment for schools (Subtitle: Sixty years of research into the impact of the acoustic design of schools – a review).

Presentation title: Acoustic beamforming array design for source imaging.

Find out more about our keynote speakers here: https://Inter- noise2022.org/keynote-speakers/

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ACOUSTICS BULLETIN JULY / AUGUST 2022 37

— inter.noise 2022

Registration Fees Registration Fees are in GBP and include VAT @ 20%

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INTERNATIONAL FOOT-BALL MATCH, (assooisrion RULES) ENGLAND « SCOTLAND, WEST OF SCOTLAND CRICKET GROUND, Hawicton Crescent, PaRricn, SATURDAY, 90th November, 1872, at 2 p.m,

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INTER-NOISE

and tragic stories of the human spirit. https://www.sharmanka.com/ Home/Welcome.html

street brands and designer stores in Princes Square, St Enoch Centre and Buchanan Galleries. The city’s wealthy past has left a legacy of some of the ﬁ nest Victorian architecture such as the iconic City Chambers, which sits majestically overlooking George Square.

ﬁ rst national park, the loch begins as a broad, island-peppered lake in the south, narrowing in the north to a f ord-like trench ringed by 900m-high mountains.

Glasgow Botanic Gardens and Kibble Palace 1.9 miles from SEC

Falkirk

The Burrell Collection 3.3 miles from SEC

Falkirk is a town in Scotland’s central belt, located around a 30-minute drive or 45 minutes on the train from Glasgow. The Falkirk Wheel, the world’s ﬁ rst and only rotating boat lift is an engineering masterpiece which transports boats 115 ft between the diﬀ erent levels of the Union, and Forth and Clyde canals. https://www.visitscotland. com/info/see-do/the-falkirk- wheel-p248061

Free entry. The Burrell Collection, named after its donor, the shipping magnate Sir William Burrell, is one of the greatest art collections ever amassed by one person and consists of more than 9,000 objects and spans 6,000 years of history. It is housed in an award-winning building in the heart of Pollok Country Park. The displays include work by major artists including Rodin, Degas and Cézanne to important examples of late medieval art, Chinese and Islamic art, ancient civilizations and more. https://burrellcollection.com/

Free entry to grounds 7am-dusk (all year) and to Kibble Palace 12pm-4pm Founded in 1817, Glasgow Botanic Gardens is located in the heart of the city’s West End by the River Kelvin and contains a variety of plant collections, woodland copses and riverside walks as well as Kibble Palace, a magniﬁ cent glasshouse designed by John Kibble, which houses the national collection of tree ferns. Plants from tropical rainforests grow in the palm house. https:// glasgowbotanicgardens.co.uk/

Get to know Glasgow better Glasgow Walking app developed by Glasgow City Council https:// apps.apple.com/us/app/glasgow- walking/id930428468

While you are there, you could also visit The Kelpies, the two 30-metre-high horse head sculptures which are a true feat of engineering. This interactive map is packed full of ideas for day trips and longer stays in Falkirk and the surrounding area. https://www.visitfalkirk.com/plan- your-visit/map/

Glasgow city centre

Short trips from Glasgow (one hour away or less) Loch Lomond

Forth and Clyde Canal The Forth and Clyde Canal crosses central Scotland east to west and is linked to the Union Canal via the Falkirk Wheel. With the building work beginning in 1768, the Forth and Clyde Canal was the ﬁ rst canal to be built in Scotland and played a vital part in the Scottish Industrial Revolution by helping to transport materials. Today, the Forth and Clyde Canal hosts a variety of activities including boating, ﬁ shing, cycling, walking and wildlife spotting. https://www. scottishcanals.co.uk/canals/forth- clyde-canal/

Less than an hour’s train ride from the bustle and sprawl of Glasgow, the bonnie banks and braes of Loch Lomond comprise one of the most scenic parts of the country. At the heart of Scotland’s

Only a few minutes away by train or a 20-minute walk you can join the hustle and bustle of Glasgow city centre renowned for high

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Herbert and the New Neighbours

Herbert was a little old turtle. He lived in a little old house, and loved nothing more than to spend his days in the garden, tending to his beautiful roses and cooling his toes in his little old pond.

‘Hello,’ said Herbert softly to the children, but he soon got a headache from all the noise and went inside to lie down where it would be quiet. But suddenly, he heard the noise of very large feet running up and down the stairs in the house next door – THUNK, THUNK, THUNK. ‘Oh no!’ thought Herbert, ‘I can’t sleep for all this noise!’. He tried to ignore it, but he just couldn’t.

The next day, he got up to make a cup of tea and THUNK THUNK THUNK – there it was again. He tried wearing earplugs, but he could still hear it. By the third day, with all the THUNK THUNK THUNKS Herbert was feeling so tired and so sad, that he didn’t want to go out at all. He looked out of the window and saw that his beautiful roses were wilting and beginning to die.

Suddenly, there was a knock at the door. It was Gina and George. ‘We noticed your beautiful roses are dying and wondered if we might be able to help you in the garden? We’re VERY good at watering flowers!’ they said. Herbert started to snap ‘No! Go away!!’, but his manners took over. ‘Ahem, I mean…would you both like a drink?’ he asked, and they all sat out in his pretty little garden.

One day, he heard a loud roar from outside, and an enormous van came driving down his quiet lane. Out of the window, he saw that a family of elephants were moving into the house next door. The Elephant family laughed and tooted happily as they unloaded all their boxes.

Mummy and Daddy Elephant looked over the fence. ‘Hello Mr Turtle! How are you today?’ Herbert was quiet and shy but plucked up all his courage to say ‘I’m not feeling very well as I’m so very tired. I can’t sleep since you moved in, as the noise of the children running on the stairs is so loud in my bedroom. I’ve tried ignoring it, and I’ve tried wearing earplugs, but it still keeps me awake!’

The next day, Herbert went into his garden, and was about to water his roses when he heard screams and shouts and trumpeting; the Elephant children were playing out next door. They shouted to Herbert ‘Hello Mr Turtle!! We’re Gina and George, and we’re twins!!’

Mummy Elephant replied ‘I’m so sorry, we didn’t realise we were disturbing you! We’ll have to see what we can do to stop the noise.’ Daddy Elephant told the children they must tiptoe on the stairs until they could find a way to fix the problem.

Mummy and Daddy Elephant called Tilly the Giraffe, who was the local handy-animal – she always wore her hard hat and helped the animals in the lane with jobs around the house. She put in a thick fluffy carpet with a lovely squidgy layer underneath, to stop the Elephants’ footsteps shaking the whole house.

And since then, the children come round every weekend to help the Herbert in the garden – they use their trunks to suck up water from the pond and spray it onto the roses, and they play and trumpet to their hearts content. Herbert watches and listens to them happily, while they look after his garden together. And in the evenings, he can’t hear the footsteps in his bedroom, since the thick, squidgy carpet soaks them all up…but the children tiptoe up and down the stairs anyway, just be safe.

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Public address/voice alarm systems for a range of applications

By Aglaia Foteinou

At our ﬁ rst meeting in person after the pandemic, on 27 April, we were delighted to welcome Jim Smith to Birmingham City University. Jim is Associate Director and Electro-Acoustics Lead for AECOM and his presentation was ‘Public address and voice alarm systems for a range of applications’. The recommendations on speech intelligibility (and, in particular, STI values)

were discussed based on standards and codes of practice for both sound systems for emergency purposes (SSEP) and voice alarm systems (VAS). We learned that these are not always achievable due to long reverberation times in spaces and areas with high background noise. Jim discussed ways to optimise early to late sound in diﬀ erent scenarios such as airports, railway stations, arenas

and stadia. Signal-to-noise issues were explained in these spaces and a variety of equipment, as well as their diﬀ erences (including speakers, platform and emergency microphones), were presented. Sincere thanks to Jim for sharing his experience and very informative presentation with us, as well as Birmingham City University for hosting the meeting.

Using bioacoustics for ﬁ eld survey and using accelerometers for honeybee colony condition monitoring

By Matt Torjussen

The Midlands Branch was delighted to host Associate Professor, Martin Bencsik, and Senior Lecturer, Carlos Abrahams, of the School of Technology at Nottingham Trent University on 19 May for talks covering ‘Honeybee colony condition monitoring’ and ‘Using bioacoustics for ﬁ eld survey’. One of Martin’s numerous research interests is non-invasive methods for monitoring and predicting the behaviour of beehive colonies. His research has shown that human intervention, such as opening the hive, interferes with important mechanisms within it. Using non-invasive condition monitoring with accelerometers is a way of avoiding disrupting important processes in honeybee colonies. We

learned that honeybees do not hear airborne sound and one of the ways they do communicate is with vibration transmitted via the honeycomb structure. Martin played auralised vibration recordings of queen “toots” and “quacks”, which change over the course of a season, this included the depressing sound of vibration transmitted to the colony when the queen knows her days are numbered and there are no virgin queens to replace her; her version of “we’re doomed”. Carlos is an ecologist who uses the sound of wildlife to improve ecological surveys. Traditionally, such surveys have relied on an ecologist making visual observations in the ﬁ eld to collect data. There are some

obvious limitations to this; the time an ecologist can physically spend collecting the data, their ability to stay focused for the duration and, potentially, their presence changing the behaviour of the wildlife around them. Carlos presented ways that sound can be used to collect more reliable ecological data because sound can be collected for very long periods of time, over several sites concurrently, and with far less chance of disturbing the environment. Databases of sound recordings allow temporal, spectral and spatial data to be used to identify bat and bird species from their vocalisations, with artiﬁ cial intelligence commonly employed to improve the identiﬁ cation algorithms.

Southern Branch

Much ADO About Planning

By David Yates (Syntegra Consulting)

On Wednesday 18 May 2022, the Southern Branch welcomed Chris Turner of Adnitt Acoustics to present on the interrelationship between planning, permitted development and overheating. 15 Southern Branch members attended at ISVR in Southampton and, following a general overview of planning policy, permitted development regulations and the new Building Regulations Approved Document O on overheating, heard about a fascinating case study with two applications for the same building. The ﬁ rst application was for a permitted development of oﬃ ces to residential use which, under permitted development regulations, required assessment in respect of commercial noise sources only. The second application was a full

planning application for an upwards extension of the same building, for which all noise sources were taken into account, which includes a very busy section of the A4. Naturally, this led to vastly diﬀ erent speciﬁ cations in terms of noise mitigation and associated ventilation recommendations. The case study highlighted the dangers of the permitted development regulations as presently written as many conversions to residential use are still in danger of being exposed to an unsuitable noise environment, as there is no requirement to assess transportation noise sources.

Following the talk, a number of attendees continued the discussion whilst enjoying some light refreshment at a nearby bar.

ACOUSTICS BULLETIN JULY / AUGUST 2022 71

INDUSTRY UPDATES

Quiet Mark certiﬁ cation for Rockfon’s acoustic ceilings

Power Amplifier Nor282 2 40 48 26 m4 2 0 ie .4 2 2

Rockfon has been awarded Quiet Mark certiﬁ cation for its Mono Acoustic, Blanka and Color-all acoustic ceiling tile ranges, which will help solve excessive noise issues, and look amazing. Rockfon Mono Acoustic is a seamless acoustic ceiling, often used discreetly in residential properties, heritage projects or oﬃ ces where it looks like a smooth plasterboard ﬁ nish, but it has Class A sound absorption. It allows architects to create big geometric shapes or curves on walls and ceilings and the tiles come in 34 contemporary colours, which come with a matching grid. Poppy Szkiler, Chief Executive and co-founder of Quiet Mark, said: “Quiet Mark is delighted to approve and certify three acoustic ceiling products by Rockfon, whose selection of edge designs, dimensions, colours and shapes help architects create spaces that people can enjoy.

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New battery-operated Nor282 ampliﬁ er by Norsonic

Norsonic has designed a new power ampliﬁ er for sound insulation testing to meet the requirements of the latest Building Regulations. The Nor282 is paired with the lightweight Norsonic dodecahedron or hemi dodecahedron omni directional speakers to be ultra-portable whilst still producing a reliable and constant 120 dB. The Nor282 gives the ﬂ exibility of an inbuilt lithium battery to give users ﬂ exibility to test where mains has not yet been connected (a common issue when testing new buildings). The lightweight battery will power the system for 90 minutes of constant testing and as the ampliﬁ er can be controlled via remote control this can provide hours of testing. The charger is built in so users just have to connect to mains to top the battery up. The Nor282 has Wi-Fi built or it can set it up as a access point for direct control via PC or smartphone. It can be linked to the Norsonic 145 sound analyser which also has built in Wi-Fi meaning that no cables between the instrument and speaker systems are needed giving users full control from the meter. The ampliﬁ er has a built-in noise generator with a graphic equalizer for users to adjust the output signal to ensure they meet the 6 and 8 dB rules between adjacent 1/3 octave bands. See it at Inter-noise 2022.

72 ACOUSTICS BULLETIN JULY / AUGUST 2022

Speaker

Sto acoustic ceiling system brings calm

The StoSilent Distance system has been installed in Petersﬁ eld Museum, to create a quiet and calm environment. The Sto system was speciﬁ ed for the building by Hampshire County Council Property Services, as part of a project to create a series of new, welcoming spaces at the museum. Sto’s Acoustics Project Manager, James Gosling, said: “This is the latest in a long line of projects where our StoSilent acoustic solutions have been installed in museums – a room’s acoustic performance can inﬂ uence our sense of wellbeing, and if that performance is poor, noise from speech, movement and everyday activity can create an unpleasant environment where sounds are unclear, communication is diﬃ cult and concentration is impossible. The need for acoustically absorptive measures is therefore clear and the StoSilent Distance system can provide outstanding acoustic performance and the sort of unobtrusive visual presence which is essential for this type of building.” The StoSilent Distance system can function as a suspended ceiling, or as a wall-covering over a cavity. It features a metal proﬁ le sub-construction ﬁ tted with

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acoustic panels, which are manufactured from expanded glass granulate, making them lightweight and easy to handle,

and allowing them to be adjusted to suit any room shape and create a smooth, seamless surface.

P74

HBK launches new sound level meter with building acoustics partner

Sound and vibration expert Hottinger Brüel & Kjær (HBK) has designed the HBK 2255 Sound Level Meter, to help those involved in architectural and environmental acoustics. Weighing just 400 grams, the lightweight sound level meter has a rubberised body for a secure grip and places the measurement controls right under the user’s thumb. It has Wi-Fi® and Bluetooth® built in and works with specially created mobile and PC apps, providing an entirely new level of eﬃ ciency and control. It can also operate as a stand-alone sound measurement device without an app. HBK 2255 forms part of a new building acoustics measurement solution from HBK. The Building Acoustics Partner app provides full workﬂ ow support and wireless remote control for sound insulation measurements. The solution is completed with a HBK 2755 Smart Power Ampliﬁ er that enables wireless remote control of the sound source in a compact, robust and lightweight package.

ACOUSTICS BULLETIN JULY / AUGUST 2022 73

INDUSTRY UPDATES

Pioneering Acoustilay sets the quality standard for soundprooﬁ ng ﬂ oors

Manufactured by Sound Reduction Systems, the Acoustilay range of acoustic ﬂ ooring system products can be laid under a wide variety of ﬂ oor ﬁ nishes, including carpets, laminates, solid wood, vinyl and even tiled ﬂ oors. Available in four diﬀ erent grades, including the new Acoustilay Tilemat product, it remains a widely speciﬁ ed soundprooﬁ ng treatment due its quality, versatility and the wealth of technical and acoustic data behind it. While all Acoustilay products provide excellent impact noise performance resulting from footsteps, dropped items and moving furniture, the heavier grades of Acoustilay 8 and 15 are also able to reduce airborne noise transmission. Acoustilay can be used to meet the requirements of Part E of the Building Regulations, ‘resistance to the passage of sound’, in both new build and conversion projects. Installation is simple too, with Acoustilay being easy to cut and shape and a range of accessories to make life simple. An animated installation guide can be viewed on the Sound Reduction Systems website, where all ﬁ tting instructions can also be found, and the SRS technical team can be contacted and is always happy to help with any queries. Acoustilay is sourced and manufactured in the UK using recyclable content. It is supplied in 1,200mm x 1,200mm sheets, in thicknesses of 10mm, 12mm and 15mm to suit a variety of soundprooﬁ ng objectives.

International naming protocol for acoustic and vibration products

REGUPOL acoustic and vibration products, used in projects such as The Shard and Liverpool’s Everyman Theatre and currently going into the 2022 European Athletics Championships tracks in Munich, are now covered by a new international naming convention. Distributed in the UK by CMS Danskin Acoustics, REGUPOL products are speciﬁ ed worldwide for their noise and vibration reduction properties, chieﬂ y in ﬂ ooring applications, in construction sectors including sports ﬂ ooring, residential schemes, hotels, education, health, auditoria, retail and industrial. A sustainable product, REGUPOL is manufactured in Germany from recycled tyres. Typically, REGUPOL products consist of between 75-95% recycled materials and they are fully recyclable. The newly named REGUPOL product portfolios, REGUPOL sonus core, REGUPOL sonus multi, REGUPOL sonus eco, REGUPOL sonus curve, REGUPOL sound, REGUPOL comfort, REGUFOAM vibration and REGUPOL sonusﬁ t, include multiple grades of material and can be used in multiple combinations for varied acoustic and anti- vibration applications. The new uniform referencing across the world will make life easier for speciﬁ ers, says UK REGUPOL consultant, Jamie Symons. The new product names and updated product data are now available via CMS Danskin Acoustic’s website.

A TESTING

Cloud-based Monitoring of Vibration & Dust High quality, with exceptional value for money

| UKAS | TESTING

M. EEMC MONITORS SALES | SUPPORT | CALIBRATION UK & ROI Sales, Support & Calibration www.eemc-monitors.co.uk info@eemc-monitors.co.uk | 0208 O12 7933 Suite 5, 5a Lombard Road, Wimbledon, SWI9 3TZ.

Innovative, straightforward and practical monitoring solutions

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Sonitus DM30 – noise and dust monitor

Sonitus Systems is a high-tech company dedicated to smart solutions for accurate and highly automated monitoring applications. It was founded by the research department of Trinity College, Dublin. The latest product from Sonitus is the DM30. This new monitor uses communication and processing technology from the established EM2030 noise monitor, which is designed from the bottom up as an automated monitor. The DM30 keeps the noise capability and adds dust/particulate monitoring to run in parallel. This dual function saves considerable cost, as a single monitor can do the job of two. This means a single cabinet, SIM card/ data subscription and a power connector. The dust monitor provides accurate data, which has been certiﬁ ed to MCERTS requirements for both PM10 and PM2.5 and the system logs these channels simultaneously. PM10 is the primary channel for construction dust monitoring but PM2.5 is now often asked for by local authorities on large-scale projects. The DM30 has a built-in heater to dry the air sample before it goes through the particle counter. This ensures accurate measurements even in high humidity environments such as fog. Even with the heated inlet, eﬃ cient electronics make it possible to run the monitor on a 12v battery pack for a week or more. It also can be powered by solar and hydrogen generating systems. The system is modular and can be ordered as a dust monitor or as a combined noise and dust monitor, and customers can also integrate an anemometer for wind speed and direction. The DM30 automatically sends the data to Sonitus cloud for reporting, alerting and administration of your projects in an easy to manage platform. Typically, noise and dust monitoring are required at the same location for construction projects and the DM30 saves space, money, and time.

HEAD acoustics MDAQS: A milestone in instrumental audio quality assessment

A TESTING

MDAQS (Multi-Dimensional Audio Quality Score) is the world’s ﬁ rst binaural perception-based software tool that replaces human evaluation with novel metrics in the audio device development process. This allows manufacturers to quickly and eﬃ ciently evaluate the audio quality of all types of playback devices, such as speakers, headphones, smart speakers, headsets, etc. in a scientiﬁ c and quantiﬁ able way. MDAQS runs as an option in the test software ACQUA, the speech and audio quality measurement and analysis software from HEAD acoustics. HEAD acoustics has conducted numerous intensive listening tests with carefully selected, untrained listeners. These “naïve” listeners have evaluated a variety of diﬀ erent audio devices with music of various genres based on several parameters. The results of these extensive listening tests serve as the basis for developing the algorithms and the training of MDAQS. The comprehensive package of ACQUA and MDAQS, together with labCORE and an artiﬁ cial head such as the HMS II.3, can easily

| UKAS | TESTING

replace previously used measurement hardware and software solutions. The interaction of the faithfully recorded sound signal and the unique MDAQS metrics models human perception so well that time-consuming and cost-intensive tests with test subjects become obsolete.

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• Acoustic, Fire, Structural and Physical test laboratory

• Site acoustic pre-completion testing

The Building Test Centre Fire Acoustics Structures T: 0115 945 1564 www.btconline.co.uk btc.testing@saint-gobain.com

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ACOUSTICS BULLETIN JULY / AUGUST 2022 75

INDUSTRY UPDATES

SRL’s rain noise test facility

Laboratory testing facilities

SRL Technical Services Limited recently completed the construction, ﬁ t-out and qualiﬁ cation of additional test facilities, doubling their previous testing capacity. With the facility hired by the day or half day clients can do several tests in a day, a unique and valuable aspect of the service. The new East Laboratory comprises ﬁ ve test rooms and an area for sample preparation and build. The Lower North receiving room has a large sample test aperture, ideal for walls, partitions, curtain walling, cladding systems and large windows and doors. The Lower South receiving room has a bespoke smaller sample test aperture for double and single door sets, windows and smaller panels. Access to the ground ﬂ oor middle room is via a large wide opening door. The Lower Ground ﬂ oor receiving rooms also have large access doors at each end. The Lower North and South are also receiving rooms for the two horizontal test apertures which work with the Upper North and South source rooms. The Upper North source room has an open aperture that is designed for ﬂ oor and roof systems to be built and tested in. There is also an in-built crane system to aid the installation of samples into the test aperture.

The other horizontal test suite has a permanent 140mm thick concrete ﬂ oor, which has been designed for testing impact improvement of ﬂ oor coverings on concrete ﬂ oors. This ﬂ oor can also be built onto as well as ceiling systems added below for airborne and impact sound insulation testing. Adjacent to the testing facilities are private client viewing rooms which overlook the test suites and conference room facilities. This new test suites complement the existing test suites and reverberation room which are in an adjacent building. The bespoke rain noise testing facility measures the noise levels that rain produce when landing on a particular roof construction. Rain noise testing is often required for buildings where the occupiers need low internal noise levels to study and concentrate or use video conferencing facilities. Achieving a particular rain noise speciﬁ cation is particularly important in schools and hospitals where the roof must achieve rain noise criteria set out in BB93 Acoustic design for schools: performance standards and health technical memorandum 08-01: Acoustics. Where previous guidance only required designers to consider rain noise in their roof designs, they must now demonstrate the roof and

ceiling can achieve speciﬁ c rain noise criteria within the rooms of the school or hospital. The way rain noise moves through the diﬀ erent layers of the roof construction is extremely complex. By measuring the rain noise on the rig, SRL can quantify this quickly and accurately, which avoids costly and time-consuming predictions. Roof systems can easily be over-designed when there is inaccurate or missing rain noise data which can lead to unnecessary upgrades to improve the rain noise performance. SRL’s rain noise test facility is UKAS accredited for testing the sound generated by rain fall onto building elements, including roof and skylight systems, fully in accordance with BS EN ISO 140-18:2006 The ducted Attenuator test rig is a UKAS accredited facility for testing to BS EN ISO 7235:2009 ‘Laboratory Measurement for ducted silencers and air terminal units. Insertion loss, ﬂ ow noise and total pressure loss’. SRL is the only independent UKAS accredited laboratory that holds this standard. Using a signiﬁ cantly diﬀ erent approach to earlier test standards, the latest standard now includes a ‘modal ﬁ lter’ to create a predominantly ‘plane wave’ sound ﬁ eld.

76 ACOUSTICS BULLETIN JULY / AUGUST 2022