Sound source for all kinds of acoustic measurements.

* Generates white noise and pink noise and uses a 1/1 octave filter to produce band noise.
* White noise and pink noise covers the 20 Hz to 20 kHz frequency range, and octave band noise uses center frequencies from 31.5 Hz to 8 kHz.
* Applications include architectural acoustic measurements, sound absorption factor measurements in anechoic chambers, and sound insulation measurements.