That has been made, especially on the old dynamic mic's. You wanted the
membran to move as freely as possible, to get best sensitivity.
Klas.
At 10:12 2002-02-09 -0500, you wrote:
>Klas Strandberg wrote:
>>
>> Sorry, a language problem here - vacuum is the wrong word, I just mean that
>> there is no resonance volume behind the membrane, or a tuned resonance
volume.
>
>It's more like there is no path for sound to get to the back of the
>membrane. Since all the sound has to come to the membrane by one path
>you don't get the phase cancellations that are what make a mic directional.
>
>I've wondered at times if any of them try sound deadening material
>instead of a closed volume. The membrane would vibrate more freely if
>it's not working against a sealed space.
>
>Walt
>
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