my a/c-heater unit thing in my dorm is making this very irritating high pitched noise. maintenance can't hear it. so i need to prove that it's there (this is important because i live in a 12 month dorm and will be here this winter).
are there any programs or devices that will measure frequency and volume?
how could i go about doing this?
brewnog
Nov30-05, 08:48 PM
You could get (hire) a sound pressure meter, and measure the sound pressure level above a reference at a distance of 1 metre from the device, at several points around the device. You can then use the meter to obtain an octave (or third-octave) band analysis on the noise to obtain a spectrum of a number of frequency ranges with their corresponding amplitudes.
You could then look up some standards for noise levels in residential accommodation, and see whether your air conditioner complies with the standards.
You could then probably make your case to maintenance on health and safety grounds.