Re: My MZ-RH1 mic in: -122.8 dBu noise floor

["Raimund Specht" animalsounds]

J. Beale wrote:

> I redid the measurement with a different attenuator, with Z=3D150 ohms
> out this time; all the rest of the setup was the same. The total noise
> floor was improved by 1.6 dB. Some small noise spikes also appeared,
> eg. around 15 kHz. I am not sure if that is internal to the unit or
> not. I took down the setup, reassembled it, and re-ran the test. I got
> the same results again to within 0.1 dB.
>
> Measured MZ-RH1 input noise level (150 ohm source)
>
> -122.2 dBu (unweighted)
> -124.4 dbu (A weighted)
>
> http://beale.best.vwh.net/measure/audio/MZ-RH1_Mic_30_150Z.htm

Thanks. So, your original prediction was correct. The small noise
spikes (that obviously limit the noise floor figure) probably
originate from the digital section of the recorder. However, this is
no reason for complaint in such a compact unit.

Regards,
Raimund