4. Acoustics
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Electro-acoustic transducers

Acoustics – Plural diaphragm sound sources
Patent

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Electro-acoustical structure

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Electro-dynamic speaker

Acoustics – Diaphragm – With damping means
Patent

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Electro-hydraulic dipole vibrator

Acoustics – Geophysical or subsurface exploration – Well logging
Patent

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Electro-mechanical reproduction of sound

Acoustics – Diaphragm and enclosure – Rounded enclosure
Patent

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Electroacoustic device with broad frequency range directional re

Acoustics – Plural diaphragm sound sources – Plural chambers
Patent

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Electroacoustic diaphragm and method for making same

Acoustics – Diaphragm – Critically defined material or coating
Patent

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Electroacoustic public address unit with acoustic horn or...

Acoustics – Sound-modifying means – Intensifying horn
Reexamination Certificate

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Electroacoustic transducer

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Electroacoustic transducer

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Electroacoustic transducer

Acoustics – Diaphragm – With resonant chamber
Patent

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Electroacoustic transducer comprising a membrane with a...

Acoustics – Diaphragm – Particular shape
Reexamination Certificate

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Electroacoustic transducer filter assembly

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Electroacoustic transducer frame and method of making the same

Acoustics – Diaphragm – Critically defined material or coating
Reexamination Certificate

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Electroacoustic transducer having a variable thickness diaphragm

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Electroacoustic transducer with mechanical impedance transformer

Acoustics – Geophysical or subsurface exploration – Well logging
Patent

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Electroacoustic transducers

Acoustics – Diaphragm
Patent

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Electroacoustical converter

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Electroacoustical transducing with at least three cascaded subch

Acoustics – Plural diaphragm sound sources – Plural chambers
Patent

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Electrodynamic loudspeaker

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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