Bone conduction sensor
The vibration signals generated by the vocal cords are propagated in two ways: one is through the air medium outwards, and the other is through the human skull bones and muscles outwards, causing the auricle to vibrate. The bone conduction sensor utilizes the latter propagation method to detect the vibration signals of the auricle and pick up the wearer's speech information. Bone conduction sensors are insensitive to airborne sound wave signals and have a natural inhibitory effect on airborne sound signals. Therefore, the call noise reduction algorithm is simpler, more natural, and more effective in noise suppression, providing better uplink call quality.
Category:
MEMS acoustic sensor
Product Description
Technical parameters:
| PARAMETER | CONDITIONS | MIN | TYP | MAX | UNIT |
| Supply voltage（Vdd） | 1.6 | 2.5 | 3.6 | V | |
| Current consumption（Idd） | 150 | μA | |||
| Sensitivity (X direction) | @1kHz | -26 | dBV/g | ||
| Acceleration range | for THD <10% @ 4kHz | 4 | g | ||
| Peak position (resonance freq) | 3.5 | 4 | 4.5 | kHZ | |
| Noise floor | 20 Hz to 20 kHz, A-weighted, rms | -82 | dBV | ||
| DC Output | 0.8 | V |
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