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Horn speaker and method for producing low distortion sound

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Horn speaker with linear grooves in a front surface of a pole pi

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Horn type loudspeaker

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Housing acoustical amplifier

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Housing shell for an in-the-ear hearing aid

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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