The Zoom H2 measurements were done by Richard Mudhar. The Zoom H4n measurements were done by John Lundsten. The Roland R-05 measurements were done by Per Baekgaard. The SONY Hi-MD MZ-RH1 Measurements were done by John Beale. The dynamic range figure at the maximum available gain setting alone should not be interpreted as an indicator for the performance of a recorder because these numbers will of course depend on the individual maximum gain of the various recorders (a higher maximum gain tend to result in a lower dynamic range figure). Note that the dB gain figures that are often specified by the manufacturers do not represent a meaningful characterization of the relevant input sensitivities that would be needed in practice. The input (clipping) level at the maximum available gain setting represents the maximum input sensitivity (or "gain") of the recorder. The errors of the measurements should be less than +-2dB ![]() When available, the figures in brackets indicate the manufacturer's specifications. Increasing the sample rate would also not improve the results because the decimation filters in the delta-sigma A/D converters already average the oversampled signals. Note that a bit-depth of 24 bit would not improve the noise level figures at these high gain settings. PIP, limiter and noise cancelation options were disabled. All parameters were measured at the maximum available gain setting (at which the lowest possible noise floor can be obtained), except where indicated otherwise. Recording format: 44.1 KHz, 16 bit (unless indicated otherwise), mono (left channel). Bat echolocation and communication calls.Ultrasonic vocalizations in laboratory rats and mice.Common audio recording (50 Hz … 20 kHz). ![]()
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