Acoustic measurements show just how good the sound quality is in PCS Comfort modules
To get on paper how good the sound quality is in the new PCS Comfort modules from PCS Modulsystem, acoustic consultant Boris Lukic from leading urban planning consultancy Tyréns has tested noise levels in the modules.
“We are an entirely independent acoustic measuring consultancy. We do not rate what is good or not good; we simply report the results of our tests in data. In terms of acoustics, wooden constructions are always more problematic than concrete in keeping noise levels down. However, overall, from an acoustic point of view, we can see that this is a well thought out and light wood structure. The only flaw in terms of sound are the longitudinal floor joists that run from one room to another, but thanks to our measurements, PCS now knows how that this can be rectified,” says Boris.
We have reviewed Boris’s 24-page report, which includes measurements of air and impact sound absorption, installation noise, reverberation times as well as data on façade absorption between building modules.
“Premises are required to meet sound class C standards in all measurement categories. This module does that. In fact, it meets sound class A or B in all areas, apart from footfall sound that is transmitted via the longitudinal floor joists to other rooms. But if the points that I have recommended are addressed, we know from previous measurements that you can then be in the top sound rating. Something we’ll have to do in an assembled school,” says Boris.
Sound class B – at the very least
“Back in March we changed our production methods to include a new, heavier floorboards in corridors to improve impact absorption. We aim to meet at least sound class B in all categories. And we’ll follow up the new design with new measurements,” says Gert Hedström at PCS Modulsystem.
Perhaps the most important thing is what these results mean for the staff and children who use the schools, pre-schools and after-school clubs day-in, day-out for whom the new PCS Comfort have been primarily designed.
40 dB stops dead in the walls
“Regarding the absorption of noise between rooms, the results show that the walls dampen noise by a least 40 dB,” explains Boris.
“We can also confirm that one of the parallel walls is fitted with sound absorbing material, not just the ceiling, which is entirely correct to ensure that noise in the room subsides pleasantly,” he adds.
Boris Lukic conducts acoustic measurements of sound levels in the new, quiet PCS Comfort modules.
Results of the sound test:
An overview of the results of the sound test, measured according to Swedish standard SS 25268:2007:
From corridor to classroom – Sound class B
From group room to classroom – Sound class A
Footfall from corridor to classroom – Sound class C
Footfall from group room to classroom – Sound class A
Installation noise – Sound class B
Reverberations in classroom – Sound class A
Reverberations in group room – Sound class B
For the complete sound test report, contact PCS Modulsystem AB.
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