SONY M10 works great and uses little power, the main limit is storage max
Message: 32GB.
Subject: I would avoid MP3, at least for scientific work.
A solution is to use a pocket recorder with SDXC cards, now available up to
512GB, and external powering. I'm now using an OLYMPUS LS100 with EM172
mics, a 256GB SDXC card, and 250Wh external battery. All put in a small
pelicase, with a cable exiting though a hole sealed with some glue. This
way I get 14 days of continuous stereo recording at 48kHz, 16 bit. It is
important to set the internal clock correctly to segment the recordings
into more usable file lengths.
I'm now searching for a pocket recorder cheaper and simpler than the LS100,
but with SDXC cards. Any hint ?
Gianni
2016-02-26 10:51 GMT+01:00 Peter Shute [naturerecordists]
<>:
>
>
> Another option is to use a consumer recorder like a Sony M10, etc, in MP3
> mode with an external battery pack to do long continuous recordings, and
> just throw away the bits you don't want. Depending on the bitrate, you
> should be able to get 10 days or more onto a 32GB card. I think a single
> pair of D cells should last 4 or 5 days.
>
> The challenge is to weatherproof it enough. I put mine in a clip lock box
> that also holds the extra batteries, and the box sits inside a cooler bag
> for extra protection. I use external EM-172 microphones, that don't have
> much protection other than a plastic lid held down with elastic. It's
> survived overnight downpours, but I try to avoid rain.
>
> Please let us know what you come up with, I'm interested to know about
> other possible solutions.
>
> Peter Shute
>
> Sent from my iPad
>
> On 20 Feb 2016, at 1:01 AM, Tom Williams <mailto:
> > [naturerecordists] <
> <>=
>
> wrote:
>
>
>
> Hi Andrew,
>
> Ultrasonic versions of what you describe are used extensively for bat
> research and monitoring and there are ones designed for use in the audibl=
e
> frequency range as well. The Wildlife Acoustics Song Meter range should b=
e
> suitable for the kind of work you want to do:
> http://www.wildlifeacoustics.com/
>
> They're pretty expensive though - hopefully someone else on the group may
> know of a cheaper option!
>
> All the best,
>
> Tom
>
> On 19 February 2016 at 13:41, <mailto:
> > [naturerecordists] <=
m
> <>> wrote:
>
>
> Hi,
>
>
> I was wondering if the group has experience with remote sound recorders
> analogous to camera traps that you can leave for about one month. I would
> want to record nocturnal owls, bats, hyrax, bushbabies here in East Afric=
a.
> Either one that can be triggered by sound or programmed to record a sound
> window of say 2 hours per day to limit battery time. Does anyone have any
> recommendations?
>
>
> Regards Andrew
>
>
>
>
>
>
--
Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
Universit=E0 degli Studi di Pavia
Via Taramelli 24, 27100 Pavia
http://www.unipv.it/cibra
http://mammiferimarini.unipv.it
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