Sound testing calculates the extent to which sound is blocked by the partition (walls, floors etc) of a building between dwellings. It evaluates the efficiency of the soundproofing materials that make up the structure. It is compulsory for new buildings and refurbishment projects, according to Approved Document E (ADE) updated in 2003.

Not having a sound insulation certificate issued after a test, has resulted in additional costs and expenses for developers. Any development that has not taken a sound test will not be given a completion certificate by Building Control. We know how important a sound insulation certificate is to you. That is why we work hard to make certain that you get the certificate quickly. We take great pride in providing our certificates to you as soon as possible after the tests.

AF Acoustics’ competent and well-trained engineers, who will be available for testing, can even let you know the verbal results of your sound test. You will receive a written report in the space of a working day.

Our Guarantee

  • Over 15 years experience
  • State of the art equiptment
  • Onsite Support
  • Next Day Report Turn Around
Call us today for a quote on 020 3372 4430
Or you can email us at info@af-acoustics.com

What is a Sound Test?

Developments must test all walls, floors and ceilings that separate buildings or neighbours in a dwelling, to conform to Approved Document E (ADE) of the Building Regulations. You may not have to test your building if you used Robust Details which were approved before their installation. Sound testing conducts impact and airborne sound test on structures. The tests include the separating floors, walls and areas between buildings within developments.

What is involved in a Sound Test

Even though sound insulation testing equipment produces lots of noise, sound testing requires quiet conditions and dwellings. Because of this, workers on the site would have to leave during the time of the test, to avoid errors in the test calculation. The process of a sound test is determined by the size and complexity of the site being tested. Most of the time the test will be conducted in 90 minutes, for a simple, regular sized construction.

After the sound insulation test, the sound testing engineer will provide provisional results whilst on-site, as well as providing basic feedback about what has been noted during the test, e.g. potential problems or any future areas of concern.

A full and thorough report with the certificate of the test will be given to you within 24 working hours. The sound testing regime is set out in the Approved Document E of the Building Regulations. It states that one set of tests is required for every 10 units in a group or sub-group. Sub-groups are defined in Section 1 of Approved Document E (ADE). There are three types of grouping criteria that need to be assessed: dwelling houses (including bungalows), flats and rooms for residential purposes, such as student accommodation and hotel rooms, care homes etc. How much testing that is required for each category can be found below.

Importance of Sound Insulation Testing

After the 2003, Approved Document E mandates that all new structures in UK must take a sound insulation test before completion. 62 dB L’nTw’ or less impact sound and 45dB DnTw+Ctr or higher airborne sound insulation is the required result. These result limits were put in to create and maintain a uniform standard for sound resistance in different parts of a dwelling and between adjacent buildings. When sound resistance is high in party walls and floors, the environment is more comfortable, since sound affects every aspect of our lives – work environment, home environment and while relaxing. This is why sound testing is crucial.

Sound insulation and speech privacy are critical for a variety of reasons. Inadequate sound insulation can be extremely distressing to those affected by it. For instance, in an apartment building, the neighbour upstairs might invite friends over during the weekend and put on loud music. The inhabitant downstairs might spend night hours as work time. If the sound insulation is inefficient, this could lead to lots of problems. Sound insulation helps improve the quality of a person’s life in diverse ways. It can be useful in dwellings with neighbouring units/flats/rooms which have diverse purposes, by guaranteeing that an occupant in a room will hear as little noise as possible from the neighbouring room.

Do I Need a Sound Insulation Test?

Are you converting your property into several units? Does your design not use Robust Details? Are you constructing a new building with more than two rooms? Are you building a nursing home or rooms that will used for residential purposes, like hotels and hostels? If so, your structure needs to undergo a sound test. It is imperative that sound insulation tests be undertaken, as explained and stipulated by ADE. There are 2 ways you can comply. Test for sound insulation using the method of Approved Document E or use Robust Details in your development.

Robust Details are design details for walls that were tested formerly and meet the sound performance parameters stated by Part E of Building Regulations. With it, you don’t need a sound insulation test, but you must completely follow every aspect of the design from the Robust Detail Approved list. Being able to adapt your design to suit your needs is more efficient and costs less in the long run. When on-site pre–completion building sound tests are taken, architects have more scope with their design and can increase the sound insulation performance of the construction.

Price for Sound Insulation Testing

Contact us and we’ll give you a free quote on the sound test cost based on the requirements of your building. Our prices are extremely competitive and we’ve worked on developments of various sizes and types. You’re also assured of a quick turnaround time for your sound insulation test report and certificates.

Sound Insulation Test Time

Ideally, we would conduct a test when a development nears completion, and once all internal and external doors and windows have been fitted. We can test earlier to check if there are any problems. To be able to conduct sound insulation testing we require the provision of a 240V power supply, and a quiet site (a noisy site can make conducting the tests extremely difficult). Access will be required to all rooms of the development unless a test schedule is determined in advance.

How is sound insulation testing carried out?

Sound testing procedure is quite simple and our engineers are happy to explain this on site. The boundary floors and walls get airborne tests. Floors get an additional impact test.

The airborne sound insulation test is carried out with a large speaker or dodecahedron speaker, using a white or pink noise generator to create the source sound, almost always in the largest room of the two rooms under testing. A sound level meter is then used to take noise measurements within the source room and the receiver room. The background noise level is also measured. The higher the background noise then the higher the source noise will need to be set, since the resulting noise level in the receiver room needs to be 10dB higher than the background noise at all measured frequencies. Airborne sound testing is done in a similar way. First, two speaker positions are used for each source room. Then, the level of sound in the receiver room is measured so that the difference in noise level between the two rooms can be calculated.

This basic level difference is then ‘corrected’ to allow for the reverberation time (the time taken, in seconds, for a noise source to decay by 60 dB) and the existing levels of background noise monitored whilst in the receiving room. Impact tests are done by placing a standardised tapping machine on the floor. The noise level is then recorded in the room below. Calculations based on these measurements are undertaken and the results compared to the Building Regulations Part E requirements for the given type of the building. Without the mathematical formulae used in the calculations, this is a simple explanation, however, it helps explain the testing process.

Call us today for a quote on 020 3372 4430
Or you can email us at info@af-acoustics.com

Kind of Testing Equipments Used

Our high-tech sound insulation machines are UKAS calibrated and our accredited expert engineers conduct the test using Building Regulations present criteria. The calculation of the level of noise transmitted through the air between two adjoining units is known as an airborne sound insulation test. We use pink or white noise generator and speakers on one side of the partition. A sound level meter is used on calculating sound in both units. We use a tapping machine, which drops metal hammers onto the floor to create impact noise. We then measure the amount of sound that passes through the partition with a sound level meter in the room under the tapping machine. The tests are carried out in rooms suitable for residential use like bedrooms, lounges and kitchens. The outcome of the test is written in a report and sent to the customer. This report helps Building Control sign off your building.

Sound Insulation Testing is necessary for these types of builds:

For sound testing we usually undertake impact and airborne sound test on buildings. This affects the separating floors and walls between habitable rooms of buildings and developments.

A new building with not less than two rooms

With the sound test, you can be certain that the property has a good acoustic performance.

Converting a property into several units

The transformation of a single dwelling property into flats must adhere to the sound insulation standards of Building Regulations.

Designs without Robust Details

The Robust Detail Scheme, set up in 2004 by Robust Details Ltd, architects create design details for walls and floors that were tested formerly for sound insulation and meet the sound performance parameters stated by Part E of Building Regulations. Once the design does not strictly abide by the design from Robust Detail approved list, the structure will have to undergo a sound test to ensure it conforms to Building Regulations. Minimum criterion differs based on the type and purpose of the development. A development with rooms intended as residences, like a hostel or hotel, won’t have the same criteria as a structure for permanent dwelling.

Which areas of the UK does AF Acoustics cover?

AF Acoustics is an acoustic consultancy providing acoustic design services to clients nationwide, especially in Bedfordshire. We work with architects, planning and environmental consultancies as well as private individuals and government agencies. We’re based in several areas across the south east region of UK so that we can give you the most cost effective quote in the industry.

Why you should choose AF Acoustics

We have worked with many organisations and individuals in Bedfordshire. Our clients have endorsed us for the following reasons:

More than 15 years’ experience

We understand the sectors our clients work in. Our advice is not only technically robust but also practical and helpful to our client’s particular situation. In more than 15 years, we have acquired extensive experience with providing acoustic solutions to private individuals and organisations in the UK, no matter the size or scale of the project. You get expedience and value for the price.

Great prices

Compared to other sound insulation testing service in Bedfordshire, our prices are extremely competitive. This is because we want you to be able to afford the best expert sound testing service there is. To get a free quote for your dwelling, contact us today.

Fast and efficient consultancy

We will interpret your problems and necessities, present you with vigorous ideas and provide acoustic advice through our extensive experience. Both your short and long-term needs are handled with our professional guidance and quick answers to your problems.

Adjustable test dates

Your convenience is also important to us. This is why we offer you flexible options that let you pick test dates that are most convenient for you. Call us now to schedule sound insulation testing in Bedfordshire

Get your test reports quickly

We try to provide test reports within 24 working hours. That way, you can take the right action based on the results of the test. We make certain all relevant issues are covered and quality tips are supplied by detailing all the aspects of the test in the report.

Sound insulation services we provide

AF Acoustics provide a scope of exhaustive and detailed acoustic solutions for clients across the country, making certain our techniques have the best quality and performance. To find out more about we can help you with your acoustics needs, call or email us right away.

Impact and airborne tests for floors

The ceilings/floors of developments undergo impact and airborne floor testing. Impact testing evaluates how much the sound flowing from one partition to another through party floors via impact is. These floors in habitable rooms of flats undergo both impact and airborne tests.

Document E test

Our sound insulation tests meet the requirements of Building Regulations Part E, which describes building structures resistance to the movement of sound within and from adjoining structures. New builds must achieve impact sound test results of no more than 62dB L’nTw and airborne sound insulation of no less than 45dB DnTw+Ctr. Converted properties must achieve impact results of 64dB L’nTw or lower and airborne sound insulation of no less than 43dB DnTw+Ctr.

Sound test

We want to give our customers the most highest chance to acquire a pass and via our offer skilled services. To make sure a new residence meets with the standards of greater than 45dB DnTw+Ctr and less than 62dB L’nTw, an airborne wall test and an airborne and impact floor test will need to be conducted. We regularly offer consultations to builders and project managers at the beginning of the development, so that they can take the appropriate action and are confident when it’s time to take the sound insulation test. Simply contact us immediately ad you’ll get a free quotation in addition to more details about our sound testing services.

Call us today for a quote on 020 3372 4430
Or you can email us at info@af-acoustics.com

Acoustic design tests in schools in accordance with BB93

Building Bulletin 93 (BB93) states the benchmarks for the acoustics of school buildings. It additionally portrays the typical methods for aligning with the Building Regulations. If you’re constructing a new school in Bedfordshire, we can conduct a test to be certain it meets the standards of BB93.

Acoustic layout

AF Acoustics give definite design services and consultancy services to all types of developments. We create bespoke solution and can provide information on the best available acoustic products. We will tailor our design solutions to your project.

As anybody who has needed to handle the acoustics for a building will know, it’s essential to get proper advice, early in the project from a good acoustic expert. AF Acoustics can help you with identifying the right acoustic needs and standard for your construction at the beginning period and advise you on how to meet them.

We will help you with:

Creating acoustic detail plans for architects involved in residential construction that conform to Document E of Building Regulations, BS8233 and so on. Detail plans in commercial, educational and healthcare project for adhering to the prescribed standard. Specification and design of building services for noise control in residential and other noise sensitive scenarios Increasing sound through public enterprise and sound reinforcement systems in conference rooms, halls, lecture theatres and the like.

Contact AF Acoustics specialist for sound insulation test quotes

As an independent acoustics consultancy, AF Acoustics is able to provide extensive acoustic survey and design, investigations in the field of planning and noise, architectural and building acoustics, and air permeability testing. Our professional guidance and advice is provided to private individuals, businesses and government agencies amongst others. You can contact us by sending us an email on info@af-acoustics.com or calling us for a free quote.

020 3372 4430 Contact us

Giving the following information to us will be helpful

Give us the following information when contacting us

Location of property

Where is your property located in Bedfordshire?

Number of dwellings

Total number of dwellings in the structure

Number of Storeys

To get a precise quote, let us know the total number of floors you have.

Number of dwellings per floor

To help us get you an accurate quotation and evaluate the scope of the test to be taken, tell us how many dwellings there are per floor.

Type of development

Knowing the kind of building is essential because it helps identify the type of test that will be conducted.

New dwelling or converted property

The testing requirement for new builds and conversion projects are different. We will need this information to determine what standard the testing ought to follow. With this information, we can easily provide you with an accurate and competitive quote on your project in little time.

Sound testing regulations

Our sound insulation tests are conducted in accordance with Part E Building Regulations in England and Wales and Section 5 of the Scottish Building requirements. You can also get credits for Code for Sustainable Homes and EcoHomes environmental assessment projects.

Part E of building regulations resistance to the passage of sound (England and Wales)

Our certified engineers can come to your building whenever it might suit you to undertake sound insulation testing to Part E of Building Regulations adherence, recognised by Building Control.

Scotland Standard division for completed constructions

Section 5.1 of the Scottish Building Standards explicitly describes expected energy performance of dwellings. It states, “Every building must be designed and constructed in such a way that each wall and floor separating one dwelling from another, or one dwelling from another part of the building, or one dwelling from a building other than a dwelling, will limit the transmission of noise to the dwelling to a level that will not threaten the health of the occupants or inconvenience them in the course of normal domestic activities.” Tests should be taken at the completion of the building, using procedures given in annex 5.C. of the Scottish Standards. These standards don’t apply to detached structures that have access only for maintenance or are to used only by the occupants who live below.

How to get a pass certificate for your sound test

The most efficient way to make sure you pass sound insulation test is to have a plan that puts sound insulation into consideration from the begining. You don’t have to spend too much for this and it will save you money in the long run, ensuring you don’t pay remedial or re-test expenses. If you are unsure of how to build the separating floor and wall constructions and associated junctions across your development to satisfy the requirements of Document E 2003, we can offer design advice. The degree of guidance you require can vary, from site visits and comprehensive design reports, to simpler initial testing to know the starting point for construction. The are required in order to have good conditions to undertake the sound insulation tests: Windows and internal and external doors are fitted and operable Skirting boards are fitted and sealed Fix all light switches, light fittings and plug sockets. We work with several professionals in construction from the beginning of the design stage to the completion of the development to make certain it conforms to Document E 2003 of Building Regulations.

Test and report certificates

To get details of the results of a completed sound insulation test, we will provide you with an analysis and report certificate. 6. Even before you get the certificate, you get the verbal results of the test. First, our completely skilled and competent sound insulation test engineers give you a verbal result at the site. They also offer advice on potential problems. Then the test report certificate is sent to you within 24 working hours, when feasible.

What do the results look like?

A sound insulation certificate will be issued whether the Sound Testing results and report indicate compliance with Part E of the Building Regulations or not. In the event of a wall or floor not achieving the Part E requirements, it may be necessary to carry out remedial works before having another sound test carried out. We can provide you with remedial design advice to help you achieve the Building Regulations requirements.


Sound Insulation FAQ’s

The minimum requirements depend on a variety of factors such as if the development is a new build or refurbished, whether the development is intended to be a permanent dwelling, or classified as “rooms of residential purposes” (e.g. hotels, student accommodation, etc).

New builds must achieve impact sound test results of no more than 62dB L’nTw and airborne sound insulation of no less than 45dB DnTw+Ctr. Converted properties must achieve impact results of 64dB L’nTw or lower and airborne sound insulation of no less than 43dB DnTw+Ctr.

Flanking sound (or flanking noise) is sound that transmits between spaces indirectly, going over or around, rather than directly through the main separating element. This can allow sound to transmit between spaces even though the main separating element itself provides good acoustic insulation. Engaging our services at an early stage allows us to check designs and add necessary measures to prevent this occurring after construction. In the worst cases, flanking can exceed the direct transmission and lead to a failed test, despite highly specified partitions.

In the case of impact sound, the building construction is caused to vibrate as a result of a physical impact, such as footsteps on floors or stairs. The resulting vibration is radiated into other rooms in the building.

We can provide preliminary results on the day of test. We strive to deliver next day reporting in all scenarios regardless the complexity or size of the project. The delivered report will be comprehensive and detailed, to ensure all relevant issues are covered. The best recommendations can also be sent in a separate report or email.

We can normally conduct up to a maximum of three sets of tests per day. One set is two airborne floor tests, two airborne wall tests and two impact floor sound tests.

When it comes to the acoustic tests, a full set of tests should take approximately 90 minutes.

The requirements of sound insulation testing are fully detailed in the Building Regulations Approved Document, available here [link], under Part E (2003).

This requires all residential buildings to be tested when they involve walls and/or floors. These are known as party elements.

Assuming no tests are failed, building control bodies should stipulate at least one set of tests for every ten dwelling-houses, flats or rooms for residential purposes in a group or sub-group.

New builds must achieve impact sound test results of no more than 62dB L’nTw and airborne sound insulation of no less than 45dB DnTw+Ctr. Converted properties must achieve impact results of 64dB L’nTw or lower and airborne sound insulation of no less than 43dB DnTw+Ctr.

We recommend that if possible, we are contacted before a build to provide a design review and advice on how to meet quality standards.

Should the test fail, we can offer advice on how to improve the sound insulation. We have consulted on hundreds of building projects in the past, and have ensured all of them have met the building regulations. If a sound insulation test fails, we can give remindial advice to ensure the tests passes later.

We understand that most clients would prefer testing to take place as soon as possible. Once you get in touch we will schedule the test at the earliest available opportunity.

You can call us today to set up an appointment for sound insulation testing. Our scheduling is flexible so that you can get the service you need at your convenience.

Ideally, a test should be carried out as early as possible as problems are more difficult to fix the further along you are. Where possible, it’s recommended that testing is carried out before kitchens or bathrooms are installed. The minimum that we require to be able to carry out a test is:

  • All doors, windows and seals should be fully fitted and closable
  • All electrical fittings should be fitted and working
  • 240V mains power must be available on-site in all rooms
  • Gaps in walls and floors should be fully sealed
  • All walls and ceilings should be plastered
  • There should be no holes remaining in floors or ceilings
  • Testers will require access to all rooms on all levels

Pre-completion sound testing is a building regulation requirement for all purpose built & “formed by material change of use” (i.e. refurbished) properties since 2003. Sound testing is undertaken in a percentage of properties in each development to ensure that the separating walls & floors between habitable rooms of neighbouring properties meet the minimum requirements as defined by Approved Document E, commonly referred to as ADE.

From 2003, Approved Document E states that all new UK builds must undergo pre-completion sound insulation testing. New builds must achieve impact sound test results of no more than 62dB L’nTw and airborne sound loss of no less than 45dB DnTw+Ctr. Converted properties must achieve impact results of 64dB L’nTw or lower and airborne sound loss of no less than 43dB DnTw+Ctr. Approved Document E sets out details pertaining to the resistance to the passage of sound.

This Approved Document, as part of UK Building Regulations helps to ensure that newly built or converted houses and residencies, flats and residential spaces and other relevant buildings are constructed to minimum standards that provide ‘reasonable resistance to sound from other parts of the same building and from adjacent buildings.’ All of our tests are fully compliant with Approved Document E and our expert team have been carrying out compliant tests for many years, for thousands of satisfied customers throughout the UK.

We understand the sectors our clients work in. Our advice is not only technically robust but also practical and helpful to our client’s particular situation. At AF Acoustics, we always look at the bigger picture and work towards the ultimate development goal.

In order to provide you best solutions, we will listen to your needs, present you with robust solutions and deliver acoustic consultancy through our considerable experience. Our ever-expanding knowledge-base allows us to provide cost-effective and streamlined solutions.

Our consultants are very experienced and have a proven track record on both small scale projects and major projects. As we are a lean and small company, we have lower overheads and therefore offer exceptional value for money.

Airborne sound (or airborne noise) is sound that is transmitted through the air. Airborne Sound Insulation is the insulation against noise originating in air, e.g. voices, music, motor traffic, wind. The greater the airborne sound insulation between two rooms, the lower the resulting sound level in the receiving room.

This is unlike Impact Sound Insulation that protects against noise originating directly on a structure by blows or vibration e.g. footsteps above, furniture being moved, drilling and hammering the structure.

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Call us today for a quote on 020 3372 4430
Or you can email us at info@af-acoustics.com
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Adrian Finn

AF Acoustics lead Acoustic Engineer, Adrian is your first port of call for all sound insulation testing questions enquiries and surveys.

Working Hours

  • Monday 08:00 - 18:00
  • Tuesday 08:00 - 18:00
  • Wednesday 08:00 - 18:00
  • Thursday 08:00 - 18:00
  • Friday 08:00 - 18:00
  • Saturday Closed
  • Sunday Closed