Gerald,
I failed to note that the recording level was set yo 127 the max
level. I have not tried this test at other levels but maybe that would
be informative. I did vary the resistor value over a range of 10 ohms
to 10,000 ohms and did not notice any significance. I think I'll add
that recording level info to the data file.
Can you give me a link to Rob's web page of the data you referenced?
I'll see if I can correlate.
The data I collected would represent a level of noise around 60 db
below the maximum recording level just below the clipping level.
There is variation based on frequency. The low frequencies are worst
of all reaching -50db but that is in a region that is not a problem.
The values in the 2000 to 6000 hz range are most important to me.
Ted
--- In G W <> wrote:
>
> Ted,
> I struggle with interpreting test numbers so perhaps your test is
self explanatory, please help me get a handle on your test.
> I looked at Rob's web page where he describes the self-noise of the
HIMD and find it difficult to relate that info to yours. If the HIMD
numbers in Rob's information were represented as -db, what would that
be? Or the point of my question is what is the difference between the
two units? Would the gain setting on the H-2 make a difference with
the external mic shorted with the resister or does that produce max gain?
> Gerald White Muscatine, IA
> ----- Original Message ----
> From: Ted Coffey <>
> To:
> Sent: Monday, October 8, 2007 2:00:41 PM
> Subject: [Nature Recordists] Zoom H2 Self-Noise Test
>
> I just uploaded 2 files to the members file folder:
> 1. Zoom H2 Self-Noise.Wav
> 2. Self-Noise Test Data.txt
>
> Conditions for the test are listed in the txt file with the data values.
> I used Audacity to analyze the spectrum.
> Recorder serial number 5926
>
> Ted
>
>
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>
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>
> Be a better Globetrotter. Get better travel answers from someone who
knows. Yahoo! Answers - Check it out.
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