Does anyone know of any simple and cheap white noise generator circuits, which have an output of 90dB? I have included the link of the circuit I have built. I am using 18 volts dc instead. Does anyone know of any circuits or have built any generators that are fairly loud?


http://www.eeweb.com/blog/extreme_circuits/simple-white-noise-generator

 

Just run the white noise output into the input of an audio amp and speaker. You get a similar white noise effect if you tune between stations on an FM tuner with no squelch.

 

No. First you make white noise, then you amplify it, then you put that into a speaker. A white noise generator doesn't have a speaker. It's like asking if anyone knows of a cow that gives cheese. No, there are several steps between cow and cheese, and there are a couple of steps between white noise and "loud".

 

This circuit with a full bridge output should be able to drive a decent pair of headphones way past 90db mw SPL.