4. Electrical audio signal processing systems and devices
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Acoustic receiver having improved mechanical suspension

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Housed microphone
Reexamination Certificate

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Acoustic recognition system using accumulate power series

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent

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Acoustic reflector

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
Patent

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Acoustic regenerator

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent

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Acoustic replay device

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Patent

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Acoustic reproducing apparatus

Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
Patent

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Acoustic reproducing apparatus

Electrical audio signal processing systems and devices – Headphone circuits
Patent

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Acoustic resonator having mode-alignment-cancelled harmonics

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – By modifying fluid flow
Patent

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Acoustic sensor and electric stethoscope device...

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With piezoelectric microphone
Reexamination Certificate

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Acoustic sensor using curved piezoelectric film

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electrostrictive – magnetostrictive – or piezoelectric
Reexamination Certificate

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Acoustic shock prevention

Electrical audio signal processing systems and devices – Audio transducer protection circuitry
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Acoustic signal enhancement system

Electrical audio signal processing systems and devices – Having microphone
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Acoustic signal level limiter

Electrical audio signal processing systems and devices – Noise or distortion suppression – Peak limiting or pulsive noise compensation
Reexamination Certificate

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Acoustic signal processing apparatus

Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Adjacent ear
Patent

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Acoustic signal processing apparatus and method, and audio...

Electrical audio signal processing systems and devices – Noise or distortion suppression – Spectral adjustment
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Acoustic signal processing method and apparatus

Electrical audio signal processing systems and devices – Sound effects
Patent

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Acoustic signal processing unit

Electrical audio signal processing systems and devices – Sound effects
Patent

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Acoustic signal processing unit

Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent

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Acoustic signal reproducing apparatus

Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
Patent

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Acoustic signal reproducing apparatus

Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
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