Vibration sensors /
Skin conduction microphones

This is an acceleration sensor made using electret condenser microphone technology. It has higher sensitivity than general piezoelectric element acceleration sensors and can pick up signals such as biological information.

Vibration sensors / Skin conduction microphones

Model	Diameter (mm)	Height (mm)	Sensitivity (dB)	Resonance frequency (Hz)	Remarks
S17	20.8	7.2	- 46	3200 ~ 3800	Skin conduction mic Transmitting calls under high noise conditions, etc.
S26NS5C1	5.8	2.2	- 34	1000 ~ 2000	Vibration sensor Compact size / Micro vibration sensing / High sensitivity
S27NS5C1	5.8	2.2	- 50	6000 ~ 7500	Vibration sensor Compact size / Micro vibration sensing / Wideband
S28NS5C1	10	3.65	- 25	1000 ~ 2000	Vibration sensor Micro vibration sensing / High sensitivity
S29NS5C1	10	3.65	- 48	5500 ~ 6500	Vibration sensor Micro vibration sensing / Wideband