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Re: how high will a mic go?

Subject: Re: how high will a mic go?
From: Walter Knapp <>
Date: Sun, 09 May 2004 16:05:01 -0400
From: "Rich Peet" <>
> 
> In a out of list conversation on the why do you want higher sample 
> rates.  I was asked if my mics can get close to the max of a 96khz 
> sample.  Well I didn't know for sure so I tried my mic as a bat 
> detector tonight.
> 
> The old mkh-110 seems to have no problem capturing this bat up at 
> about 30,000 cycles.

The problem is not in getting a mic to pick up sounds at the high 
frequencies, but in getting it's sensitivity to anything like even at 
various frequencies.

Some mics do have cut off filters in them, but a awful lot don't. But 
don't expect linear response. It may work fine at one frequency, and not 
at all at another. And those extremes may be so close together you will 
only get part of the range of a call.

If you want a mic for 96khz sample rates such mics do exist, designed 
for the job. The Sennheiser MKH-800 is specificially designed for this 
purpose. Equivalent to the MKH-80 except it's been redesigned to give 
even frequency response up the 50khz. I understand that took a fair 
amount of design work.

I believe I've seen notes about a few others as well, but can't remember 
which they were.

Walt






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