4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Thermal response to, or generation of, sound vibration
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Noise cancelling microphone

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Thermal response to – or generation of – sound vibration
Patent

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Noise cancelling microphone for full coverage style helmets

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Thermal response to – or generation of – sound vibration
Patent

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Noise removing apparatus using a microphone

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Thermal response to – or generation of – sound vibration
Patent

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