ventilation noise ("Alain de Cheveigne'" )

Subject: ventilation noise
From:    "Alain de Cheveigne'"  <>
Date:    Wed, 29 Mar 2000 22:04:43 +0100

We've just installed a new double-walled psychoacoustic booth and are wondering about acceptable levels of ventilation noise. After a first change of ventilators the level in a 1/3 octave band at 100Hz is down to about 40 dB SPL, as measured by a B&K sound meter (when ventilation is off the meter fluctuates around 20 dB SPL). We're wondering if we should accept this as normal. Has anyone made similar measures in a similar booth? Any insights are welcome. Alain

This message came from the mail archive
maintained by:
DAn Ellis <>
Electrical Engineering Dept., Columbia University