At 7:44 PM -0400 7/2/07, Steve Pelikan wrote:
> the self noise of the AT3031 (is it as good as
>reported for the 3032 omni?)
Unfortunately, I think not.
>I now know several people who swear that expensive cardioids are
>better in parabolas
How about two cardioids in separate, big, parabolic dishes with an
adjustable parallax for stereo? Rob D.
>
>Cheers!
>
>Steve P
>Rob Danielson wrote:
>>
>>
>> At 11:27 PM -0700 7/1/07, umashankar wrote:
>> >in theory, it should be an omni mic, but in practice, cardioids work
>> >better. all you need to make sure is that it is a widish cardioid,
>> >so it 'sees' the whole dish and not just a small part.
>>
>> Why would you generalize that cardioids are better? Maybe someone
>> knows how much of a parabolic dish would be ideally covered evenly by
>> each mic if stereo or by one mic if monaural.
>>
>> When I compare the polar patterns at 5KHz, the AT3031 Cardioid is
>> down about 7dB at 90 degrees off-axis and the The AT3032 Omni is down
>> about 3dB at 90 degrees off-axis:
>>
>> http://ad2004.hku.nl/naturesound/3031-32_Card_Vs_Omni_PolPat.gif
>> <http://ad2004.hku.nl/naturesound/3031-32_Card_Vs_Omni_PolPat.gif>
>>
>> The rear rejection with a cardioid mic might be a good thing,
>> especially for an monaural parabolic dish? Rob D.
>>
>> = = = =
>>
>> >
>> >umashankar
>> >
>> >
>> >i have published my poems. you can read (or buy) at lulu.com
>> >
>> >
>> >
>> >----- Original Message ----
>> >From: no_mas_films <
>> <NoMasFilms%40comcast.net>>
>> >To:
>> <naturerecordists%40yahoogroups.com>
>> >Sent: Monday, July 2, 2007 9:45:18 AM
>> >Subject: [Nature Recordists] Cardioid Vs. Omni for use in Parabolic
>> >mic setup...
>> >
>> >
>> >Recently I asked the group to recommend a good relatively low cost
>> >microphone for use in the 22" parabolic mic setup I am building. I was
>> >suprised that one of the mics was a omni (the AT3032)... now I AM
>> >truely confused as I was under the impression that a cardioid would be
>> >better by rejecting sound from anywhere other then the focal point of
>> >the reflector. Please share your expertise with this newbie! Help!
>> >Thanks, Chris
>>
>>
>>
>>
>>
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>>
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>
>
>
>"While a picture is worth a thousand words, a
>sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause
>
>Yahoo! Groups Links
>
>
>
--
Rob Danielson
Peck School of the Arts
Department of Film
University of Wisconsin- Milwaukee
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