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Re: Ultrasonic recordings in rats
Dear Jeremy,
I am looking to make some recordings of ultrasonic rat
vocalizations... [to] around 50 kHz. I would assume that a good
high frequency condenser microphone and preamp are in order...
It depends (as does almost everything) on what your requirements
are. If you want to measure moderate sound levels to great accuracy,
then a laboratory standard is appropriate; if your requirements of
accuracy are less stringent, or if you want to measure low-level
sounds, there are much cheaper alternatives. We've had good results
recently with some new microphones from Knowles Acoustics - their
FG23652 or FG23629 both have good sensitivity and a low noise floor,
and their SPM0204UD5 ultrasonic MEMS mic might also be sufficient. I
think we got them from Digi-Key. They'll need phantom power (which
can be from a battery), and you can use any instrumentation amplifier
with them.
Mike Ravicz, Eaton-Peabody Lab., Mass. Eye & Ear Inf., Boston MA
02114 USA
+1 (617) 573-5591; FAX +1 (617) 720-4408; mike_ravicz@xxxxxxxxxxxxxxxx
"In theory, there is no difference between theory and practice,
but in practice, there is." - Charles Wells