Acoustic Microphone Specifications

  • Directional Characteristic: Omnidirectional

  • On-Axis Sensitivity: +12 ± 4 dB FS re: 1 Pa at 1 kHz, measured at 18 dB gain setting

The following charts reflect default gain (+18 dB), 48 kHz sample rate, calibrated sound source one meter from the recorder, perpendicular to microphone axis.

Figure 1. Sensitivity and Noise Floor, Linear Frequency Scale
The sensitivity is roughly flat with minor ripples at 12 dBFS/Pa from 100 Hz to about 18 kHz. From 18 kHz to 20 kHz, the sensitivity falls from 15 dBFS/Pa to about 5 dBFS/Pa. The noise floor is at its highest at 100 Hz, about -77 dBFS/square root Hz. Between 500 Hz and 20 kHz, the noise floor falls roughly linearly from -92 dBFS/square root Hz to -107 dBFS/square root Hz.
Figure 2. Sensitivity and Noise Floor, Logarithmic Frequency Scale
The same information as the previous plot is shown here. The logarithmic frequency scale emphasizes the extent of the flat portion of the sensitivity curve, before sensitivity rolls off between 18 kHz and 20 kHz.