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Old December 23rd, 2003, 07:00 PM   #1
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CS-1 and Off-axis Attenuation

I'm gonna be taking a look at the Sanken CS-1
soon. To those who know about this mic, is it
suppose to give more off-axis attenuation than
other mics in *just the lower frequencies*? Or is
it stronger than most directional mic's
at attenuating the higher frequencies, also?
And regarding mic off-axis attenuation in
general, I've heard that the attenuation
is only in the upper frequencies. How is
the attenuation of the spoken word?
For example, if you were interviewing
a person and off to the side there were
two people talking amongst themselves,
would their vocal frequencies be in the
the range that a mic would attenuate?
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Old December 24th, 2003, 12:00 AM   #2
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some light reading
http://www.schoeps.de/E/overview-mic-types.html#shotgun

look at the polar patern and frequencies of this cardoid, the higher frequencies are attenuated more so. The frequency range of two old bats gossiping isn't that high.
http://www.gefell-mics.com/specs_m300.htm

A hypercardoid will be tighter yet
http://www.gefell-mics.com/specs_m200_pg2.htm#hyper
click on the pattern symbol on the bottom right and the graphs will change.
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Old December 24th, 2003, 02:14 AM   #3
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Very informative, especially the frequency
response graphs. From them it appears as if,
for those mics anyways, there is no off-axis
attenuation of speech. So what *do*
directional mics attenuate, if not speech?
Does anyone know the frequency range
of the human voice?
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Old December 24th, 2003, 05:38 AM   #4
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I couldn't find the polar response for a Sanken shotgun

The cardoid Gefell atenuates 5 db at 90 deg for most freq and around 12 db at 16 khz. past 120 there is a really extensive and consistant drop accrosss the board.

I'm having trouble finding a good graph of a short shotgun showing all frequencies. If the Shoep[s writup is to be taken seriously, there is minimal difference.

Keeping the mic as close as posible and booming it from above will help isolate the sound..
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Old December 24th, 2003, 02:12 PM   #5
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Polar Response for Sanken CS-1 shotgun
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Old December 24th, 2003, 02:48 PM   #6
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This may be of interest:

Rycote has published a Microphone Data CD-ROM with lots of info on nearly a thousand microphones and more than sixty manufacturers. It is updateable as new mics are being brought out.

It is available at B&H for just $14.95.
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