– The omnidirectional (or non-directional) microphone’s response is considered to be a perfect sphere in three dimensions, in fact the smallest diameter microphone gives the best omnidirectional characteristics at high frequencies. Being pressure-sensitive they also have a very flat low-frequency response.
Pressure-sensitive microphones also respond much less to wind noise and plosives than directional (velocity sensitive) microphones.
Back Electret ø4×1.5mm HBO0402D-62 : 2V, <=0.5mA, -42±3dB, 100~10000Hz
Back Electret ø6×1.6mm HBO0602K-65 : 2V, <=0.5mA, -45±3dB, 100~16000Hz
Back Electret 5.8×2.2mm HBO0603Z-53 : 3V, <=0.5mA, -33±3dB, 100~10000Hz