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Re: 3032 capsules & bats

Subject: Re: 3032 capsules & bats
From: "Gianni Pavan" gpavan1960
Date: Sun Jun 15, 2014 2:04 am ((PDT))
Hi David,
     next time I'll go there I'll fill my backpack with both high quality
audio and ultrasonic recording gear !   I was fascinated by the "sound" of
the wings !

2014-06-15 1:08 GMT+02:00  [naturerecordists] <

> > About silence, just recently I had a wonderful experience in the
> abandoned
> > tunnels (a 12 km network) of a chalk cave. Absolute silence improved by
> > soft sound absorbing chalk powder and very irregular tunnel surfaces.
> Next
> > time I go there with my microphones and recorders for doing some tests.
> In
> > some larger tunnels we found bats colonies, their social calls were
> > fascinating, but the most impressive noise was those of the wings of th=
> > bats flying when disturbed. I did some recording with a phonometer but
> its
> > noise floor was higher than the ambience noise, probably I'd need the
> > microphone to make measures there.
> > Next time I'll go there with my usual microphones and recorders for doi=
> > some recordings.
> Gianni,
> This afternoon I was back with the bat roost I have been monitoring with
> IR
> cameras and ultrasound for some time. Try to get hold of a cheap
> heterodyne
> bat detector to hear all the ultrasounds you are missing. It's a whole ne=
> world of sound.
> These bats are a maternity roost of Lesser Horseshoe bats, and they are
> surprisingly active in the daytime in a dark loft space. More fun will
> come
> later as the youngsters learn to fly.
> It's not just bats that you can hear with a detector, but many insects an=
> small mammals also emit ultrasound.
> David Brinicombe

Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
Universit=C3=A0 degli Studi di Pavia
Via Taramelli 24, 27100 Pavia

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