on the outputs so it may not be possible to take full advantage of the
high sampling rates unless there is a way of disabling or bypassing the
filters. For example, the Audigy2 card is listed as having a frequency
response of 46 kHz. I would be interested in hearing what sort of
frequency response people have actually achieved with these new
high-performance sound cards. Also, do they really give you 24 bits of
signal-to-noise ratio? A common problem with high resolution A/D and D/As
is that electronic noise pervents you from getting the last few bits of
performance out of the board.
--------------------------------------------------------------------
David C. Mountain, Ph.D.
Professor of Biomedical Engineering
Boston University
44 Cummington St.
Boston, MA 02215
Email: [EMAIL PROTECTED]
Website: <a href="http://earlab.bu.edu/dcm/";
rel="nofollow">http://earlab.bu.edu/dcm/</a>
Phone: (617) 353-4343
FAX: (617) 353-6766
Office: ERB 413
On Mon, 10 Feb 2003, Dave Mellinger wrote:
>
> 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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