[bct] Re: information on binaural mikes

  • From: "Phil Vlasak" <phil@xxxxxxxxxxxx>
  • To: <blindcooltech@xxxxxxxxxxxxx>
  • Date: Mon, 20 Feb 2006 13:23:37 -0500

MessageHi Neal,
Real binaural mikes are placed inside an artificial head that has rubber ears 
to simulate real ears.
But like you said, they produce sound that works well if you hear it through 
headphones.
Phil


  ----- Original Message ----- 
  From: Neal Ewers 
  To: Bct 
  Sent: Monday, February 20, 2006 11:27 AM
  Subject: [bct] information on binaural mikes


  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

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