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Re: Artifacts in recordings?

Subject: Re: Artifacts in recordings?
From: "froggologist" froggologist
Date: Tue Sep 25, 2012 12:22 am ((PDT))
Hi, thank you both for your answers. No, the recordings are in .wav format. 
They have not been modified in any way as far as i know. 


--- In  Peter Shute <> wrote:
> What format are these recordings in? Is it possible that you're looking at 
> mp3 artefacts?
> Peter Shute
> --------------------------
> Sent using BlackBerry
> ________________________________
> From: 
> To: 
> Sent: Sun Sep 23 02:54:57 2012
> Subject: [Nature Recordists] Artifacts in recordings?
> Hello everyone!
> I am new to this forum, i have looked around the topics, but have not found 
> the answer to my problem, so here it is:
> I got these recordings from other people i am collaborating with, and i don't 
> know exactly the recording equipment or the recording conditions (like 
> mic-animal distance for example). I get 2 types of odd things in the 
> recordings i suspect are artifacts:
> - very asymetric oscillogram, and a "smir" on the spectrogram, above and 
> under the frequency band
> - a less marked "smir" in the spectrogram, only above the DF, but going all 
> the way to the max frequency of the recording, and extra harmonics
> The second case looks a bit like what i get with a saturation, but none of 
> those recordings are saturated. I thought, the second case might be a "near 
> effect"? if the person put a recorder simply too close from the source. 
> However, for the first case, i just dont know!! In addition those recordings 
> are from species i have not necessarely worked with before, so i can't really 
> tell what should be a "normal" spectrogram for those species....
> Does anyone of you have an idea of what it may be? And whether i can still 
> use these recordings in some way?
> Thank you!
> Sandra.

"While a picture is worth a thousand words, a 
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.

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