[Top] [All Lists]

Re: Ultrasound playback setup (from Raimund Specht)

Subject: Re: Ultrasound playback setup (from Raimund Specht)
From: David Mountain <>
Date: Wed, 12 Feb 2003 12:22:45 -0800
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
 Website: <a  href=""; 
 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=""; 
 > rel="nofollow"></a>
 > SoundBlaster Audigy 2 : <a  
 > href=""; 
 > rel="nofollow"></a>
 > A suitable amplifier would be the TEAC A-H300 stereo amplifier. Its frequency
 > range goes up to 80 kHz: <a  href=""; 
 > rel="nofollow"></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
 > 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=""; 
 > rel="nofollow"></a>.
 > Regards,
 > Raimund
 > ----------------------------------------------
 > Raimund Specht
 > Hauptstr. 52
 > 13158 Berlin
 > Germany
 > phone/fax : +49 30 9163758
 > ----------------------------------------------

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the Bioacoustics-L mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU