Why do throat mics almost always have 2 elements?

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SUMMARY

Throat microphones, such as the Assault MOD Waterproof Tactical Throat Mic, typically utilize two transducers to enhance sound capture and noise cancellation. The dual transducer setup allows for effective ambient noise reduction while ensuring that the primary vocal signal remains intact. The transducers are likely connected in series opposition, enabling the cancellation of external noise while capturing vibrations directly from the vocal cords. This design leverages the throat's unique properties as a vibration sensor, making it more effective than traditional microphones in noisy environments.

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  • Basic knowledge of noise cancellation techniques
  • Familiarity with electrical circuit concepts, particularly series circuits
  • Awareness of human anatomy related to sound production
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theycallmevirgo
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Most things like this

https://www.coderedheadsets.com/Assault-MOD-Waterproof-Tactical-Throat-Mic-p/assault-mod-wp.htm

generally have 2 transducers. Why? If for phased array noise cancellation, can someone give a broad outline of the "summing" circuit?
 
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I would guess that the two transducers are connected in series opposition. As both are subject to ambient noise, it will be cancelled. But only one transcuder is coupled to the vocal cords, to that signal is not cancelled.
 
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Try this search. Noise cancelling does not seem to be needed.The skin at the throat being much thicker than the eardrums, likely doesn't vibrate nearly as much... and some sites describe a throat mic as a vibration sensor.

https://www.google.com/search?&q=throat+mics
 
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