naturerecordists
[Top] [All Lists]

Re: mic spacing vs spatial veracity

Subject: Re: mic spacing vs spatial veracity
From: "Klas Strandberg" klasstrandberg
Date: Sun Aug 4, 2013 2:27 pm ((PDT))
Here is one of the most revealing tests that I know:
Headphones required.

http://klas.telinga.com/demo/walkinginacircle.mp3

Klas

At 11:25 2013-08-04, you wrote:
>Any stereo array can easily be tested for efficacy by the simple
>expedient of (while recording) walking across the soundfield in an
>arc equidistant from the mic array. If the spatial representation is
>accurate as captured, when the recording is played back over
>properly positioned loudspeakers (=B130=BA for conventional stereo; =B145=
=BA
>for X-Y Blumlein crossed figure-of-eight) the footsteps should
>progress evenly from one side to the other. You could be forgiven
>for thinking this would be the result in most cases, but in fact it
>seems to work only with crossed figure of eights and M-S arrays,
>both coincident. All spaced arrays produce extremely aberrant
>results with this experiment.
>For most nature sound recordings I don't think it matters much -
>especially of animal sounds - but to me it does matter when I am
>trying to capture what might be called an acoustic, such as a stream
>or a beachfront with waves (to realistically capture the movement of
>the breaking part of the wave).
>
>------------------------------------
>
>"While a picture is worth a thousand words, a
>sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
>
>Yahoo! Groups Links
>
>
>
Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email: 
website: www.telinga.com









<Prev in Thread] Current Thread [Next in Thread>
Admin

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU