some years ago i found a whole load of patents on the uspatent site for second
order microphones. mostly for use in cell phones. others for hearing aids. it
would be interesting to revisit the ideas, especially as i am now able to do
very odd shapes using shapeways.
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
Date: Mon, 20 Dec 2010 21:15:39 -0800
From: hel...@ai.sri.com
To: sursound@music.vt.edu
Subject: Re: [Sursound] does anyone have harry f. olson, gradient
microphones, jasa 1946?
I sent it to Jörn directly. RCA made a 2nd order microphone at one point
http://www.coutant.org/bk10a/
Aaron
2010/12/20 Jörn Nettingsmeier netti...@stackingdwarves.net:
it's cited in philip cotterel's thesis as the original source of the
second-order gradient microphone. i can't believe it's not on the web,
given its ripe old age.
any pointers would be welcome. (and no, i didn't find it in the
motherlode either.)
thanks in advance,
jörn
--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487
Meister für Veranstaltungstechnik (Bühne/Studio), Elektrofachkraft
Audio and event engineer - Ambisonic surround recordings
http://stackingdwarves.net
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