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Old September 19th 09, 11:23 PM posted to alt.binaries.schematics.electronic
RST Engineering - JIm RST Engineering - JIm is offline
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First recorded activity by DIYBanter: Jul 2009
Posts: 9
Default Threshold of hearing - hearing threshold.pdf

Sometime get a very good recording of a baby in a real hissyfit cry and see
where it peaks.


"AnimalMagic" wrote in message
On Sat, 19 Sep 2009 11:30:47 -0500, John Fields


4kHz (or thereabouts) must be a real painful frequency.