sound generator
sound generator
(OP)
Is there such a device where sound can be easily generated by entering given SPL in each 3rd octave band (31hz to 8000hz), thereby recreating the same sound profile as equipment manufacturers published test data





RE: sound generator
It is different sound when you shape noise with filter bank
and different when you have periodic excitation before filter bank. You could do this numericaly by using
inverse FFT and excitation (some kind of pulses, even basic aproximation of Dirac pulse with unit amplitude).
Excitation should be related to machine speed (like number of revolutions per second). Ford tried something like this to model engine noise in their cars.
Dubravko
RE: sound generator
For an example see www.mpiuk.co.uk under acoustic control
Regards
RE: sound generator
You could easily filter white noise (with a DSP board) to give you the same/similar spectrum as the published data.