Acoustic Microphone Specifications

Attribute Value Notes
Directional Characteristic Omnidirectional
On-Axis Sensitivity +12 ± 4 dB FS re: 1 Pa at 1 kHz Measured at +18 dB gain setting
Signal-to-Noise Ratio (SNR) 78dB Typical at 1kHz (1 Pa, A weighted) 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 15 dBFS/Pa from 200 Hz to about 10 kHz. From 10 kHz to 18 kHz, the sensitivity falls to -15 dBFS/Pa, where it stays until 20 kHz, the upper end of the plot. The noise floor starts around -95 dBFS/square root Hz at 200 Hz and falls to -115 dBFS/square root Hz at 20 kHz.
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 10 kHz and 20 kHz.