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Re: [Phys-L] non-linear ears.

There was a time and place where universities were sprinkled liberally on the landscape; where the faculties were warm and welcoming.At one of those places I was pleased to be shown some experiments on characterizing musical instruments. I noted that a little spark plug was installed on (I think ) a trumpet.  The rich audio spectrum available from a short spark, and its  consequent harmonic and anharmonic components were described by a Dirac delta (improper) function.
On Friday, November 13, 2020, 08:46:34 PM CST, bernard cleyet <> wrote:

On 2020/Oct/30, at 08:29, Paul Nord <> wrote:

What's interesting is that the standard hearing test you might get from a
doctor only goes up to 8 kHz.  They apparently don't consider hearing loss
above those frequencies to be important.


Forum for Physics Educators <> <>

Which angers me. 

There was a porous white cylinder in the plastic tube between the aid and the tubing to the ear mold in my system.  I thought it was a liquid block.  Not!  But A low pass filter!  I removed it and now can hear clock ticking and other high frequency sounds.  Also, tho the majority of voice is below 8k Hz, I’ve found a little better comprehension W/O the filter. 

bc  …  being an amateur horologist, is pleased;  likely can now hear crickets, also

Project:  Use the recently acquired Vernier sound sensor and Logger Pro’s included FFT to characterize clock ticks.

Forum for Physics Educators