slightly ot: battery driven microphone

[Magnus Danielson]

From: Paul Perry <pfperry at melbpc.org.au>
Subject: Re: slightly ot: battery driven microphone
Date: Wed, 09 Aug 2000 01:48:54 +1000

> At 11:38 AM 8/08/00 -0400, Mike Maloney wrote:
> 
> >to create a stronger illusion of space.  I think the list of binaural head
> >manufacturers has shrunk to Beyer and DPA, and I'm not sure about DPA. But
> >you could probably build your own.
> 
> In fact, you can.... use your OWN head! (appropriate for DIY).
> There is lots of stuff on the net abt using panasonic capsules in your own 
> ears to make binaural mics. A friend had very good results recording 
> nature settings with this (search for 'stealth' mics too, people use setups 
> like this at concerts to make pirate tapes)
> 
> I wonder if a tennis ball with a number (say 4) of capsules embedded in the
> surface 
> would do for a DIY sphere?
> We aren't looking for perfection here, we're looking for results.

If you take 4 cardiod capsules and mount them in each corner of a tetraed, it
is all of a sudden not very difficult to mix them together to get not only
the spheriod responce, but also the x, y and z axis 8 responces. This is
really what the Soundfield mike has been doing for a long time.

The tricky things for the Soundfield was the postprocessing stage, it consist
of a number of intricate processing... if you do it in Analog (and they did).
However, if you do it in digital or at least with digital control.

Cheers,
Magnus