4. Electrical audio signal processing systems and devices
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Data compression circuit of a digital audio tape recorder

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

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Device for connecting external sound generator

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

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Device for reproducing 2-channel sound field and method therefor

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

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Dipole speaker for producing ambience sound

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

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Dual-chamber multi-channel speaker for surround sound stereo aud

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

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Dynamic equalizing of powered loudspeaker systems

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

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