2.1 Microphone

The device is a general low-cost electret microphone. See the table below for technical parameters.

It is highly recommended to keep the microphone at least 10cm away from the sound source to avoid peak clipping or distortion of the signal.

Table 2-1. Microphone Parameters
ParametersValue
Manufacturer part numberBL-MP6022P-2C-44DB
Standard operation voltage (DC)2V
Active current<0.5mA
Sensitivity (1kHz, 0dB=1V/Pa)-44dB ±3dB
S/N ratio58dB
Impedance< 2.2kΩ
Frequency (Hz)20-16,000
DirectivityOmnidirectional