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Re: looking for ultrasonic source

Joe Pompei wrote

>         As some of you know, I am wanting to take high frequency HRTF
> measurements, and have settled on the Knowles microphone, which is pretty flat
> up to 80-100kHz.
>         Now I'm looking for a good ultrasonic source, something that can
> frequencies in the 30-100kHz range (or as close as I can get).  B&K mics go
> distance, but aren't very powerful.  Radio Shack (yes, rs) has a tweeter that
> goes to 40kHz.
>         Does anyone know of any others that might go higher?  Narrowband is
> too...
> Thanks,
> Joe Pompei
> Northwestern University

Some years ago Xiang Ning made his doctorate in our lab, and he worked on
miniature modeling techniques for the evaluation of concert hall acoustics,
usually in scale 1:10. Besides a miniature dummy head in that scale he also
developed loudspeakers. He is now employed by Head acoustics and continues
to work on that topic, so he will be able to give you concrete information
about that topic or even sell his speakers...

The email address of the company is "head-gr@infoac.rmi.de".


Markus Bodden

 Dr.-Ing. Markus Bodden
 Ruhr-Universitaet Bochum                             _/     _/_/_/_/     _/
 Lehrstuhl fuer allg. Elektrotechnik und Akustik,   _/_/    _/          _/_/
 D-44780 Bochum, Germany                          _/_/_/   _/_/_/     _/_/_/
 Phone: +49 234 700 6662 or 2496                _/    _/  _/        _/    _/
 FAX  : +49 234 709 4165                      _/      _/ _/_/_/_/ _/      _/
 email: bodden@aea.ruhr-uni-bochum.de
 WWW:   http://www.ruhr-uni-bochum.de/www-public/parejfbs/www/aea/aea.htm