Hi Vicky,
I can confirm your observations regarding the noise levels on the different
SENSE HIGH / LOW settings on the LS-10. The input noise levels I measured are
as follows (see also http://www.avisoft.com/recordertests.htm):
SENSE HIGH, LEVEL 10 (16 or 24 bit):
-122dBu(A) -119dBu(unweighted)
SENSE HIGH, LEVEL 2 (16 or 24 bit):
-103dBu(A) -100dBu(unweighted)
SENSE LOW, LEVEL 10 (24 bit):
-121dBu(A) -118dBu(unweighted)
SENSE LOW, LEVEL 10 (16 bit):
-113dBu(A) -110dBu(unweighted)
Note that both the SENSE HIGH, LEVEL 2 and SENSE LOW, LEVEL 10 settings provide
the same input clipping level of -30 dBu.
So, the bottom line is that one should better not use the SENSE HIGH setting
for recording louder sounds that require to turn down the LEVEL setting.
Instead one should use SENSE LOW, LEVEL 10 at 24 bit resolution.
Regards,
Raimund
--- In vickipowys <> wrote:
> Re self noise, I don't think I AM hearing Telinga self noise.
> Someone contacted me off-group to query my setting of low sensitivity
> 10 (rather than say, high sensitivity 3). There has been a previous
> discussion on naturerecordists re this. Using add on mics, including
> the Telinga and a Sennheiser ME66, I find that there is more fizz
> when using high sensitivity. Note that this applies to add on mics
> and not just the LS-10 inbuilt mics.
>
> I did a test this morning, using a metronome on front verandah rail
> (quiet, rural background), standing back 5 metres, with settings on
> LS 10 at high sens. 2.5 versus low sens. 10. At these settings the
> ticking levels of the metronome matched exactly. With both the
> Telinga mic (used open) and the ME66, there was more fizz with the
> high sensitivity setting, and when I later boosted the low sens
> recordings by 6 dB, the fizz level still did not equal the high sens.
> fizz.
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