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

["Raimund Specht" animalsounds]

Hi Rob,

On your interesting page
http://www.uwm.edu/~type/audio-reports/HiMD/index.htm
you say that the HiMD recorders would provide 32 dB more gain than a
Tascam HD-P2. However, I believe that the differences in the absolute
input levels are much smaller (you might notice that I'm a fan of the
HD-P2 ;-).

The gain specifications (expressed in dB) provided by the
manufacturers are almost irrelevant (TASCAM specifies a maximum gain
of only 46.2 dB) because there is no absolute reference declared (the
absolute reference would be the input level of the A/D converter chip).

The only relevant figure that can be reliably compared across the
various brands is the input level specified in dBu.

Tascam specifies an input level (at Trim max) of -60dBu and John
measured an input level of nearly -64 dBu for his RH1 (at High, +30).

Regards,
Raimund