Raimund, Klas and all,
I just compared 16 and 24 bit noise-wise in a quiet room, and I could=A0
hear no difference in noise between them.=A0 However there is a big=A0
difference (as mentioned previously) between high sense 2 and low=A0
sense 10, the latter being MUCH quieter.=A0 I hear this difference for=A0
both the Telinga stereo mic and the ME66.
Conclusion: I will stick with low sense 10 as my default setting for=A0
LS-10 with external mics, and stick with 16 bit.=A0 Unless I am working=A0=
with a difficult bird with soft calls (e.g. Regent Honeyeater) where=A0
my default settings would be high sense 5, 16 bit.
cheers,
Vicki
PS Klas, I am listening to all my tests through headphones.
On 13/08/2009, at 5:22 PM, Raimund Specht wrote:
> Hi Vicky,
>
> I can confirm your observations regarding the noise levels on the=A0
> different SENSE HIGH / LOW settings on the LS-10. The input noise=A0
> 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=A0
> settings provide the same input clipping level of -30 dBu.
>
> So, the bottom line is that one should better not use the SENSE=A0
> HIGH setting for recording louder sounds that require to turn down=A0
> the LEVEL setting. Instead one should use SENSE LOW, LEVEL 10 at 24=A0
> bit resolution.
>
> Regards,
> Raimund
>
>
>
>
>
> --- In vickipowys=A0
> <> 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).=A0 There has been a previous
>> discussion on naturerecordists re this.=A0 Using add on mics, including
>> the Telinga and a Sennheiser ME66, I find that there is more fizz
>> when using high sensitivity.=A0 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.=A0 At these settings the
>> ticking levels of the metronome matched exactly.=A0 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.
>
>
>
> ------------------------------------
>
> "While a picture is worth a thousand words, a
> sound is worth a thousand pictures." R. Murray Schafer via Bernie=A0
> Krause
> Yahoo! Groups Links
>
>
>
------------------------------------
"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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