Re: looking for ultrasonic source

[Mail-Account auditory <auditory@xxxxxxxxxxxxxxxxxxxxxx>]

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
 create
> frequencies in the 30-100kHz range (or as close as I can get).  B&K mics go
 the
> 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
 ok,
> 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".

Regards

Markus Bodden

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 Dr.-Ing. Markus Bodden
 Ruhr-Universitaet Bochum                             _/     _/_/_/_/     _/
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 email: bodden@aea.ruhr-uni-bochum.de
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