[LAU] OT - impulse response recording

[Arnold Krille]

On Sunday 30 January 2011 11:34:31 Hartmut Noack wrote:
> Am 28.01.2011 13:23, schrieb fons at kokkinizita.net:
> > On Fri, Jan 28, 2011 at 01:40:00AM -0500, Michal Seta wrote:
> >> A friend of mine would like to record some impulse response of various
> >> spaces.  I don't know the details nor the ultimate goal of this
> >> undertaking but the problem was about the bst equipment for such
> >> recordings.  I know a loud signal is needed (she has a starter gun for
> >> that purpose) but unclear about what kind of microphones should be
> >> used.  Any tips?  Ideas? experiences?
> > 
> > Starter guns, electric sparks, exploding balloons or preservatives,
> > etc. are not the best way to do this. You get a much more accurate
> > result and a much better S/N ratio using a sine sweep and deconvolution
> > instead.
> 
> This is true if you want perfectly exact, high fidelity, realistic
> response-files of real rooms.
> 
> But if you just want files, that produce interesting sounding
> reverb-effects, enything that fits, fits.
> 
> I use to record rooms using my mobile-phones puny videofunction, the
> built-in micro and finger snapping ;-)
> Not hi-fi at all and I would distribute these files claiming they would
> be something like tools to reproduce the original rooms. But I like,
> what I hear, if I load them into a convolver....

Using a mobile phone to play the sinus-sweep and record it with a small mp3-
player should give you the ability to "measure" different source and target 
positions in the acoustic space :-)

Gotta try that some day.

Have fun,

Arnold
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