[bct] information on binaural mikes

  • From: "Neal Ewers" <neal.ewers@xxxxxxxxxxxxxx>
  • To: "Bct" <blindcooltech@xxxxxxxxxxxxx>
  • Date: Mon, 20 Feb 2006 10:27:30 -0600

People have been asking about the exact position of binaural mikes,
especially the ones Larry uses.  Perhaps this bit of information will
help.  There are many technical articles written on this, but I'm not
going to go there.  So, this is information according to Neal which you
can take with a bit of salt.

There is binaural recording and there is quasi binaural recording.  The
first one, binaural recording, is quite strict about the shape of the
mike, the roll off of the capsule and where you place them.  The
microphones from Sound professionals will not give you true binaural
sound even if you use them correctly.  Now, I am nitpicking, because
they actually come quite close.  If you place them in your ears with the
curved piece going up the inside of the back of your ear, you will get a
close to binaural sound as you will get with those mikes.  However,
binaural sound works much better when listened to with headphones.  It
does not work nearly as well when listened to via speakers.  This is why
Crown and other companies have gone to a lot of trouble to come up with
a very close approximation to binaural sound but one which sounds good
in both speakers and head phones.  Once again, there are some rather
specific specifications for this, but again, we aren't going to go
there.  The short of it is this.  If you wear microphones in or near the
ears, and the microphones are pointing straight out to the right and
left, you will bet a very nice stereo separation because your head is
acting as a baffle.  Tri it sometimes.  Hole the microphones in your
hands and space them as far apart as you can and talk into the middle of
them.  The sound has a rather defuse quality in that you can't really
easily tell where it is coming from.  Putting an object between the
mikes does everything to give you a much better separation.  So, you can
play around with where you place the mikes either in your ears or on
glasses, or taped to the sides of your head, or worn in a hat band, etc.
You're probably get a nice recording whatever you do and if you don't
place them in your ears, the recording you get may actually sound better
through speakers.  It may not have quite the same effect as binaural
when heard through headphones, but it is a very nice compromise.
I hope this helps.  OK, now you can put away the salt shaker, I'm done.
Neal Ewers
Ravenswood Productions
Local phone:  608-277-1995
Toll Free:  888-544-8332
Email:  neal.ewers@xxxxxxxxxxxxxx
http://www.ravenswood.org <http://www.ravenswood.org/> 

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