Hi Bernard and welcome to the list. This time of year, recordists in
North America are out in the field quite a bit.
I suggest searching the List Archives to get a sense of the expertise
and which aspects of your research are best explored here. Several
are, but there's no better quick, way of finding them than searching.
I prefer to use:
http://bioacoustics.cse.unsw.edu.au/archives/html/naturerecordists/
but its been "on the blink" for me the last couple of months. (Anyone
know why?)
The other search option is the group's section in Yahoo Groups.
One March subject, "Research Project" discussed some polar
pattern/array micing questions pertaining to FFT and other analysis.
I hope to learn more about Hilbert spectrum & EMD theory and folks
using C++ or Python. Rob D.
At 3:50 PM +0200 4/17/09, Bernard Swart wrote:
>Hi All
>
>I live in a town called George in the Western Cape province of South Africa.
>
>Have been attempting nature recording for about 40 years - used inferior
>equipment. Recording mostly of birds and insects and some mamals in
>Southern Africa.
>
>I am interested in analysing bird calls - applying techniques used in speech
>analysis - do a bit of DSP, FFT, wavelet analysis, pattern recognision, HMM
>and all that.
>
>I am interested in gathering recordings for analysis - so need advice on
>equipment.
>
>Prefer to use "shotgun" type mic.
>
>Looking at Sennheiser MKH-70 and Neuman KM82i; Any comments about these?
>Is there a Sennheiser 8000 series mic alternative for MKH-70?
>
>What recorder would you suggest to complement the mic?
>
>(I noticed that the Sennheiser 8000 series has a frequency responce of 35 Hz
>- 50 KHz so this would then require a sampling speed of slightly more than
>100 KHz te record the higher end frequecy, more than the "high resolution"
>of the Marantz 661 recorder which I have just read about.)
>
>I am looking forward to suggestions.
>
>The sort of questions that I would like to investigate with sound analysis
>is inter alia:
>
>1. How easy to recognise an individual from its call? If possible how
>does individuals call change with age?
>
>2. How close is the calls of certain species? Is there more variation
>within a specy than between closely related species/
>
>3. Soes sound analysis perhaps suggest that a specy should actually be
>split into seperate species?
>
>4. Have noticed that certain calls, but not all the calls in particular
>species change with distribution - what patterns are in these?
>
>5. What common characteristics are there between species in same genus ext?
>
>So I require good recordings to enable any attempt at answering the
>above.
>
>Many Thanks
>
>REgards
>
>Bernard Swart
>
>
>
>
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