Sound Insulation Testing Services in London

Sound Insulation Testing Services in London
With so many new build and refurbishment projects starting throughout the capital, it is extremely important all developers account for robust acoustic design detailing at the design stage of their construction.

Part E of Building Regulations require that developers demonstrate the sound insulation performance of separating walls and/or floors in new-build dwellings or rooms for residential purposes (as well as those newly formed by a material change of use)

This applies to when separate buildings are attached via a common partition not exclusively used by the same occupants. The only way to the relevant compliance with building regulations is to undertake sound insulation testing on your London property.

The regulations set minimum performance requirements for sound insulation between spaces, as to provide reasonable conditions for living. Performance can be demonstrated either by sound testing a sample of as-built constructions/properties.

Sound insulation testing may also be required in non-residential buildings such as schools, hospitals, workplaces, whereas-built performance needs to be demonstrated to ensure noise sensitive areas (e.g. classrooms, wards, meeting rooms) are suitably insulated from noisier areas or to comply with BB93 & BREEAM. There are two main types of sound testing that are undertaken to comply with Building Regulations Part E, they are airborne sound testing and impact sound testing. This is a brief description of each:

Airborne Sound Testing
Separating walls and floors are tested for airborne sound. This should be undertaken by an accredited member of an organisation – APT Sound Testing is UKAS accredited for Sound Testing. When testing airborne sound performance two adjoining rooms are used. A sound source (loudspeaker) is set up in one room on one side of the separating wall or floor being sound tested. The sound levels in each are room are then measured using a sound level meter.

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, an Impact sound test may also be required. This type of sound test is used to imitate and test for impact noise or ‘footfall’ noise such as high heel shoes on the floor above.

Impact Sound Testing
For vertically separated rooms, an Impact sound test may also be required. This type of sound test is used to imitate and test for impact noise or ‘footfall’ noise such as high heel shoes on the floor above. This sound test is undertaken using a “tapping machine”, (as shown on the right) 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 (L’nT,w) is calculated and compared to the requirements of Approved Document E.

For further information contact APT Air Pressure Testing Services on 07967 233836 or 07775 623464 or visit the APT Air Pressure Testing services website.