Xref: utzoo sci.electronics:5982 rec.ham-radio:10399
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!wasatch!martens
From: martens@wasatch.utah.edu (William G Martens)
Newsgroups: sci.electronics,rec.ham-radio
Subject: Re: ultrasonic mics/transducers
Summary: National Semiconductor has a device...
Keywords: ultrasonic microphones
Message-ID: <1666@wasatch.utah.edu>
Date: 26 Apr 89 14:44:31 GMT
References: <1989@otis.oakhill.UUCP> <328@val.UUCP>
Organization: University of Utah CS Dept
Lines: 15

In article <328@val.UUCP>, ben@val.UUCP (Ben Thornton) writes:
> 
> >I am looking for something to use as an ultrsonic microphone.
> >I have a little 25KHz ultrsonic transducer but it is resonant
> >at 25KHz and offers a very narrow bandwidth around 25.  I'd like
> >to have something with a broader response.  I tested a cheapie


In a small 1977 edition of their 'Pressure Transducer Handbook' National Semi.
lists a pressure transducer recommended fr audio use, p/n LX1701G or LX1701A,
that they claim is good from dc to 50khz! I don't know if they are available
now, (12 years later)?

William Martens
UofUtah Comp Sci Dept.