Re: Determining peak frequencies - bats

["Avocet" madl74]

> However I would again stress the need to make the original recording
> of insects (especially katydids) with a recording sample rate set
> MUCH HIGHER than 44.1.   96 kHz would be a better bet, and would
> capture insect sounds up to 48 kHz.

Vicky,

This is assuming that the mic and recorder analogue circuits can 
handle these higher frequencies and also are not introducing higher 
harmonics into the recording.

Mics that handle bat frequenies are either hissy or expensive, and 
many bat detectors introduce spurious frequencies, including 
subharmonics. Thus you can often pick up 110KHz Lesser Horseshoes at 
an HD setting of 55KHz.

Has anyone used a USB Ultramic?
www.dodotronic.com/acoustic-devices/ultramics
If so, what are they like? 

David

David Brinicombe
North Devon, UK
Cogito cogito ergo cogito sum - Ambrose Bierce