Hi Raimund,
Thank you very much, great info. I certainly will try it (again) - As, I ha=
ve fooled around with your software in the past.
Well, I sure will be busy today! At some point in the future, I will write =
a review of the various applications available to us, in the Nature Sound c=
ommunity.
My first order of business, is to complete a detailed review of the new Ult=
ramic200K, to be submitted to a couple of places.
I plan on reviewing each new bat detector, as they become available to the =
public.
What I am most curious about, is the new, lower-cost bat detecting package =
that you mentioned. I wonder what the ETA will be for it?
(or, in other words, when you will have it available).
Regards,
Al
--- In "Raimund" <> wrot=
e:
>
> > I'll also be doing comparisons, to my current (Frequency division &
> Heterodyne) detectors.
>
> Hi Al,
>
> You might also try the free Avisoft-SASLab Lite software (http://www.avis=
oft.com/setup3.exe, http://www.avisoft.com/SASLabPro.pdf).
>
> There is an interesting feature in it that might help to become familiar =
with the differences between time expansion and frequency division bat dete=
ctor technology: The menu 'File'/'Specials'/'Frequency Division Bat Detecto=
r Emulation' can convert high sample rate recordings (such as those made wi=
th a USB ultrasound microphone) to a waveform that corresponds to the outpu=
t signal that you would hear if you recorded the bat by using a frequency d=
ivision bat detector.
>
> Use the Command 'File'/'Playback setting...' to play your bat recording a=
t lower speeds (option 'other sample rate.'). You could also try the unders=
ampling option (undersampl:) that performs a real-time broad-band conversio=
n. This is probably the same mechanism that Gianni is going to implement no=
w.
>
> Note that I (probably first) introduced this principle to bat detector te=
chnology in 1993 (implemented in the Laar Bridge Box time expansion detecto=
rs). It is now also available in the (more expensive) UltraSoundGate USB mi=
crophones supported both by hardware and software. The hardware implementat=
ion has the advantage that there is virtually no delay between the occurren=
ce of the ultrasounds and the converted output signal (just like in a conve=
ntional bat detector). This can be very important as the delay caused by a =
software solution can be annoying.
>
> Regards
>
|