Another possibility that's somewhat more expensive, but with greater
bandwidth, is a "Bioacoustics Workstation" package from Tucker-Davis
Technologies (TDT). The workstation is based on their RP2.1 signal
processor, which uses a 50 MHz Sharc DSP, has two A/D channels and two
Sigma/Delta D/A channels, a recording/playback bandwidth of about 90 kHz,
and a 110 dB S/N ratio. The equipment interfaces with a PC (workstation or
laptop) via USB, and is programmed directly with a graphical interface much
like Labview (RPvds). The devices can also be controlled with Active-X via
Matlab, Delphi, Visual C++, etc.
<a href="http://www.tdt.com/T2Main/Bioacoustics_wk.htm";
rel="nofollow">http://www.tdt.com/T2Main/Bioacoustics_wk.htm</a>
TDT equipment is widely used in the field of auditory neurophysiology and
psychacoustics. We use it in our lab for studies on bat audition, and one
of my former students with extensive experience in ultrasound (Willard
Wilson) works for them as a development engineer.
*************************************
William E. O'Neill, Ph.D.
Bat Auditory Research Lab
Dept. of Neurobiology & Anatomy
Univ. of Rochester Sch. of Med. and Dent.
Rochester, NY 14642-8603 USA
Phone: (585) 275-4023
FAX: (585) 756-5334
> -----Original Message-----
> From: Dave Mellinger [<a href="[EMAIL PROTECTED]"
> rel="nofollow">[EMAIL PROTECTED]</a>]
> Sent: Monday, February 10, 2003 6:57 PM
> To: [EMAIL PROTECTED]
> Subject: Ultrasound playback setup (from Raimund Specht)
>
>
>
> From: [EMAIL PROTECTED] (Raimund Specht)
> Subject: Re: Ultrasound playback setup
>
> Recently, several relatively inexpensive sound cards
> supporting playback
> rates of up to 192 kHz (new DVD audio standard) appeared on
> the market:
>
> Audiotrak Prodigy 192 : <a href="http://www.audiotrak.net/eng/prodigy.html";
> rel="nofollow">http://www.audiotrak.net/eng/prodigy.html</a>
> SoundBlaster Audigy 2 : <a
> href="http://www.soundblaster.com/products/audigy2";
> rel="nofollow">http://www.soundblaster.com/products/audigy2</a>
>
> A suitable amplifier would be the TEAC A-H300 stereo
> amplifier. Its frequency
> range goes up to 80 kHz:
> <a href="http://www.teac.co.uk/teac/index.html";
> rel="nofollow">http://www.teac.co.uk/teac/index.html</a> (go to "AMPS"
> and "Stereo Amplifier A-H300"). If you need a more compact
> and portable
> device, the Avisoft Bioacoustics ultrasound amplifier would
> be a better
> choice. That device is powered either by a 5 V or 12 ...36 V DC power
> source and has an integrated over-modulation (clipping)
> indicator in order
> to prevent distortion. Detailed specifications will be available at
> www.ultrasoundgate.com in a few days.
>
> An appropriate dynamic speaker that covers the frequency
> range from 1 to 70
> kHz is also available from Avisoft Bioacoustics. It is compact
> (80*120*65mm), rugged (aluminium housing and SPEAKON
> connector) and can
> produce high sound levels. In fact, the frequency range goes
> beyond 70 kHz,
> but the sound levels at these frequencies will be lower. See also
> <a href="http://www.ultrasoundgate.com/desktop.htm";
> rel="nofollow">http://www.ultrasoundgate.com/desktop.htm</a>.
>
> Regards,
> Raimund
>
> ----------------------------------------------
> Raimund Specht
> Hauptstr. 52
> 13158 Berlin
> Germany
>
> phone/fax : +49 30 9163758
> [EMAIL PROTECTED]
> www.avisoft.info
> ----------------------------------------------
>
>
>
>
>
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