The tests I did were based on those suggested by rob danielson using
loudspeakers and pink noise and various other sounds, I compared single
and double capsules with the Olympus ls10, capsules supplied by mike
rooke, and the double capsules were better/ more sensitive by about 3db.
I also tested battery boxes but found no difference, using with or
without.
Vicki
On 29.06.2015 02:25, rightwhales
[naturerecordists] wrote:
> I tried both single capsules and double capsules. I tried using the
> LS-11 PIP and a battery box. I tried the PCM-M10 because it has
> higher
> input impedance than the LS-11 (and the impedance of the EM172 is
> very
> high). I spent hours and hours chasing the best possible noise
> performance. In the end, I couldn't hear any difference, or the
> differences were so minute as to be meaningless even in my quietest
> recording locations. Others might have been able to hear a
> difference,
> but I couldn't.
>
> regards,
>
> john
>
> John Crockett
>
> Let us live in harmony with Earth
> And all creatures
> That our lives may be a blessing
>
> On Jun 28, 2015, at 5:08 AM, co.uk
> [naturerecordists]
> wrote:
>
> Hi Peter,
>
> The noise performance of the EM172 depends on both the pip voltage
> and
> the input impedance of the recorder, there is discussion of this in
> the micbuilders yahoo group, this graph in particular is most
> interesting, I am not sure of its origin but someone has done a lot
> of
> work on it.
>
> Nick Roast.
>
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