The highest and lowest ranges in the animal kingdom are typically
mammalia, Ivano.
At the hightest, the blind Ganges Dolphin (reported now to be either
extinct or nearly so), has been detected at around 356kHz. The lowest
are also Cetaceans, probably Right or Blue Whales, with signatures
detected well below 10Hz.
For each of these you may want to consider a higher bit rate.
Bernie Krause
On Dec 2, 2008, at 3:55 AM, Ivano wrote:
> Hi all,
>
> I'm new in this group.
> I'm an italian biologist expert in electronics.
> About 10 years ago I did my first analog bat detector and now (with a
> friend of mine) we have produced our first DSP based bat detector.
> Here you can find some feature:
> http://www.dodotronic.com/index.php?center=11&left=1
> this image is our prototype, as soon as it'll be available I'll put
> the final product.
> Now we are planning a recorder for high frequencies sounds.
> Mainly it'll have a 16 bit 1 mega sample per second with a recording
> time limited only by SD card capacity.
> The true bandwith will be about 400 KHz so it can be used both for
> bats and for cetacean (with an external Hydrophone)
> Since it's still a project (even if we have done a prototype with 200
> khz sampling) I'd like to receive all informations from field users
> in order to do the best for this device.
> Every comment and information is well accepted!
>
> Thanks all
> Ivano Pelicella
> Italy
>
>
>
Wild Sanctuary
POB 536
Glen Ellen, CA 95442
707-996-6677
http://www.wildsanctuary.com
Google Earth zooms: http://earth.wildsanctuary.com
SKYPE: biophony
|