Posted by: "Adam Liberman"
> Make sure that the 150 ohm resistor is mounted inside a metal
> connector with the case on it -- if it is open, you will pick up hum
> and interference.
One can get far enough away from sources of hum and interference for
this not to be a problem when nature recording. One of the reasons I pay
more attention to results gotten out at regular nature recording sites.
I do agree, good practice shields everything even if it might not be needed=
.
> What signal level is relevant to nature recording? That
> complicates things, as the record gain will depend on what you are
> recording, and the output level of your microphone. And then, another
> factor is to determine the noise level of the microphone, and at what
> point that swamps out the recorder's preamp noise.
I've always wanted to see tests of mics when recording ambient levels
around 20dBA. That level is common in nature recording, though at times
the ambient background can be much lower. I expect a lot of difference
from working with the standard test level which is 74dBA higher.
Standard test levels correspond well with music recording, not nature
recording. It's about time to come up with a testing protocol for nature
recording that's as precisely applied and measured as standard tests.
Walt
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