London is a massive city containing over 8 million people. In this overcrowded environment it is essential that noise transference between adjoining properties in kept to a minimum for the occupant’s well being.

When there are problems with noise transference between dwellings, and the building’s design is called into question, we can offer advice on how to upgrade the wall and/or wall partition to improve the sound insulation values.

We have extensive knowledge regarding the way different materials and construction methods can influence the results of a sound test and subsequent noise transference, this helps to ensure your company achieves compliance with the Sound Testing for Part E of Building Regulations at pre completion stage.

Pre completion sound testing in London has been a mandatory requirement since July 2003. All new build properties and conversions which were built after this date require 10% of each party wall/floor construction type to be tested. Sound insulation testing is to be carried out between pairs of rooms separated by party walls and/or floors. In is usual to test between living rooms and bedrooms as these are classed as the two main habitable rooms; however, other rooms can be used if this is not possible such as study’s, kitchens and dining rooms.

Also, we are also experiencing a rise in the amount of sound testing that’s required to existing London buildings which isn’t surprising as the amounts of noise complaints to councils has doubled in the last 10 years, as a result we have carried out a large amount of sound tests in council/housing association blocks, where the residents are experiencing excess noise between the dividing wall and floor partitions.

We also undertake sound testing to existing flats where the lease stipulates that wooden floors should not be used instead of carpets and as a result of the change of floor finishes the noise levels have increased through the floors – especially the impact noise.  In all these instances we can undertake sound testing to highlight the existing noise levels so acoustic upgrades – if required) can be targeted and implemented, i.e. it may be as simple as installing an acoustic membrane on the floors below the timber floor.

sound testing equipment

The airborne sound testing is undertaken by using a sound source, amplifier and loudspeaker to generate a high noise level in one room (the source room). Noise measurements are then taken in both the source and receiver rooms using a prescribed number of source and microphone positions. The background levels in the receiver room are measured and the reverberation time in the receiver room is also measured. From the results the airborne sound insulation (DnT,w + Ctr) is calculated and compared to the requirements of Approved Document E.

For vertically separated rooms, another type of sound test called Impact sound testing may also be required. This sound test is undertaken using a tapping machine which drops a series of weights onto the floor of the upper room. The noise level in the lower (receiver) room is measured for a prescribed number of source and microphone locations. The background levels in the receiver room are measured and the reverberation time in the receiver room is also measured. From the results, the impact sound insulation results (LnT,w) is calculated and compared to the requirements of Approved Document E of Building Regulations.

To help control noise issues APT Sound Testing can undertake UKAS accredited Part E sound testing in London and the South East. Our sound test engineers carry all the latest acoustic equipment. We provide full UKAS accredited sound insulation testing and air testing, so all or testing is completed to a strict quality controlled standard

If you would like advice on your acoustic design or sound testing in London, please contact us now at or call us on 07775623464.