phonometer calibration

Calibrated nuclear detonations?

Hi, ant. The cheapest and easiest way to do it might be to burn some white noise onto a CD, and then put your sound level meter next to a known accurate one in front of your speakers. The least expensive ones (like the one at Radio Shack in the States) should be sufficient to bounce a home brew sound level meter.

Digital-Display Sound-Level Meter Cat # 33-2055 $49.99 USD

Before you get there, though, you might want to take a look at the frequency response of your microphone element (the manufacturer usually publishes this). That's usually the main cause of inaccuracies in home brew sound level meters.

Questions of this type usually get a more enthusiastic response on s.e.b.

Good luck Chris

Try:

One word (actually three) of advise - they ain't cheap!

The cheapest way to calibrate would be to borrow/rent a calibrated phonometer and get the two to register the same value.

Got an anechoic chamber?