Kitchen Extract Fan Noise
We have been appointed acoustic consultants to a client proposing to convert a shop to a food takeaway with associated kitchen extract fan & silencer exterior to the building, supplied by yourselves.
The proposed specification is for a 450mm S&P fan (I think this may translate to either a model TCBBx2/4-450 or TCBTx2/4-450) together with a 450mm unpodded silencer (suspect : CDA 450 x 1D). The broadband sound pressure level at 3m is thought to be 67 or 68dBA for the fan and the silencer is believed to reduce noise by c.7-10dBA.
In order that I can provide proof to the local authority that noise levels will be acceptable, I need a breakdown by octave band of (preferably) the sound power levels of the fan (or sound pressure levels in octave bands at a given distance), together with an octave band breakdown of the silencer.
Can you email me this information please?