Sound Test Failure Survey
If you are unfortunate enough to fail a sound test, then professional advice should be sought from an acoustic consultant before carrying out remedial works. At Sound Solution Consultants (SSC) we will take you through the failure process step by step, explain the likely problem and confidently identify a solution, so that you can economically pass the sound test next time around!
It is often not as simple to assume that the testing problem is solely down to the separating construction alone, as sound tests measure both direct and indirect (flanking) sounds through a separating structure. Typical problems for failing a sound test are:
- bridging an acoustic floor system with skirting or being directly screwed down
- acoustic floor system of insufficient mass or form
- wrong density of block used in construction of separating or flanking walls
- build up of mortar residue (on wall ties or mineral wool slab) in a masonry wall
- incorrect type or length of wall ties in a masonry wall
- separating wall not built to underside of floorboards before fitting ceiling system
- separating wall too thin, or with insufficient mass and/or isolation
- resilient bars missing or fitted incorrectly in a ceiling system
- recessed lights have been fitted into an acoustic ceiling
Numerous other problems have been seen to exist that are not listed. One of these items could cause relevant airborne or impact sound test failures on their own, the in-situ problem could be a combination of them.
Identifying the actual cause for failure requires experience and can be a time-consuming process to confirm on site. It is extremely important that in any site-based investigation, that we are provided with precise installation details (on exactly what was installed and not what should have been).
A sound test failure survey can include several office and site-based activities:
- review of in-built construction methods and test reports
- retesting of the building to identify where the problem lies in-situ
- opening inspection holes and using a borescope to see inside cavities
- checking material components
- visually inspecting detailing
SSC have experienced consultants with a thorough knowledge of the likely problems that cause sound test failures. In each instance, we would also identify the correct solutions that can be used to remedy the problem.
We can also provide re-testing services* once rectification has been completed, even if the original tests were carried out by a third party.
*As an accredited laboratory under ISO 17025, please note that our acoustic consultancy and UKAS sound testing departments must remain impartial and independent from one another when providing both services for a single project.