Build Comply
Background Noise Measurement
Part E Sound Insulation Testing
Airborne Wall, Airborne Floor, Impact Noise Testing, Ambient Background Noise Measurement
Are you looking for a Background Noise Measurement?
Building Compliance Testing Limited can provide you with a fast and cost effective SITMA Accredited Background Noise Measurement across Mainland UK, in accordance with BS EN ISO140 and BS EN ISO16283.
Also known as acoustic testing, or pre-completion testing, testing must be carried out on new build properties as well as converted properties to demonstrate compliance with Approved Document E. A property will either require an Airborne test or an Airborne and Impact test. Airborne tests are carried out on separating walls and floors between habitable rooms of flats and houses which consists of placing a loudspeaker in one room for a steady source of noise. Several measurements are taken around the speaker. Measurements are then taken on the other side of the wall or floor. Impact tests are carried out on the separating floors between habitable rooms of flats and consist of a tapping machine is placed on the floor and measurements are taken in the room beneath. The tapping machine is placed on in 4 random location within the source room. Please ensure carpet is removed for this part of the test and access available to both sides of the floor.
Typically each test takes between ten to twenty minutes to complete. This all depends of the size of the building, the test locations, the ability to create stable sound field and unfortunately the uncontrollable influence of environmental noise
The purpose of taking background noise measurements during a sound insulation test is to establish a consistent and controlled testing environment, differentiate transmitted sound from ambient noise, and ensure that the test results accurately reflect the performance of the building partition being evaluated.
Along with your Sound Testing we can provide a full suite of building acoustic services. Preliminary experimental testing coupled with a design review identify problem areas before the final pre-completion testing.
Furthermore, we offer full reporting detailing and onsite intensity testing if a failure does occur.
If your project requires Sound Insulation Testing to meet a design criteria, Building Control request, New-Build or Change of Use, feel free to reach out to us at 01621 493594 or visiting our contact page. Building Compliance Testing commits to providing a quote within 24 hours. Upon acceptance we can dispatch a tester to your site within 48 hours for Sound Testing in London and Home Counties. Secure Expert Professional Sound Testing services today by booking with us.
Testing and SITMA Certificate for as little as £295+VAT
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Types of Sound Tests
There are a number of different tests that may be required to meet the requirements of Part E ‘Resistance to Sound’ Building Regulations. We go into more detail below.
Airbourne Wall Sound Test
When assessing the sound insulation of separating walls whether it be internal partitions or a party element, an airborne test is conducted to evaluate the transmission of airborne sound, including speech. This test involves the placement of a specialised omnidirectional loudspeaker (dodecahedron) in a source room, generating a high sound level uniformly in all directions for accurate insulation and reverberation time measurements.
A level difference is then recorded in the adjacent, upper, or lower receiving room, which is standardized to a reference value. The resulting airborne measurement provides a single numerical value that can be compared to established performance standards for sound insulation in walls.
Airbourne Floor Sound Test
When assessing the sound insulation of separating floors whether it be internal partitions or a party element, an airborne test is conducted to evaluate the transmission of airborne sound, including speech. This test involves the placement of a specialised omnidirectional loudspeaker in a source room, generating a high sound level uniformly in all directions for accurate insulation and reverberation time measurements.
A level difference is then recorded in the adjacent, upper, or lower receiving room, which is standardized to a reference value. The resulting airborne measurement provides a single numerical value that can be compared to established performance standards for sound insulation in party floors.
Impact Floor Sound Test
When assessing separating floors, a combination of an Impact Test and an Airborne Sound Insulation Test is conducted. The Impact Sound Insulation Test specifically evaluates the impact-related sound effects on a floor structure, such as footsteps.
In this test, a UKAS Calibrated Tapping Machine is placed on the floor of an upper room. The resulting sound pressure level is recorded in the room directly below (the receiver room). The impact pressure level is then standardised to a reference value, yielding a single numerical result that can be compared to established performance standards for impact sound insulation.
Reverberation Time Measurements
Reverberation time (RT60) is a measure of the time it takes for sound to decay in a closed space after the sound source has stopped emitting sound. It is typically expressed in seconds and is an essential parameter in room acoustics. A shorter RT60 indicates that sound decays quickly, while a longer RT60 implies a more prolonged sound decay, which can impact the quality and clarity of sound in a space. Controlling and optimizing RT60 is crucial in various settings, including concert halls, recording studios, auditoriums, and other acoustic environments, to achieve the desired acoustic properties and avoid issues like excessive reverberation or a “dead” sound.
Reverberation time (RT60) does not directly impact the results of a sound insulation test, which typically measures the sound transmission through walls or floors between rooms. The primary purpose of a sound insulation test is to assess the effectiveness of building elements in blocking airborne and impact sound transmission.
Reverberation time is more relevant in the context of room acoustics and the quality of sound within a space, such as concert halls or auditoriums. It pertains to the time it takes for sound to decay in a room after the sound source has ceased emitting sound. In this context, controlling reverberation time is essential to optimize the acoustic properties of a space, ensuring good sound quality and clarity.
In sound insulation tests, the focus is on evaluating the sound transmission characteristics of building partitions (e.g., walls or floors). These tests measure the ability of these structures to block sound transmission and prevent it from traveling between adjacent spaces. The results are typically presented in terms of sound insulation performance, sound reduction indices, or other relevant metrics that assess the effectiveness of the building elements in attenuating sound.
So, while reverberation time is crucial for room acoustics and the quality of sound within a space, it is not a factor in the results of sound insulation tests, which primarily concern sound transmission through building partitions.