Hearing protector

A - Human Necessities – 61 – F

Patent

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Details

A61F 11/14 (2006.01) H04R 1/10 (2006.01)

Patent

CA 2546859

A hearing protector comprises a hearing hood (2), a microphone (7), a loudspeaker and an amplifier. The hearing hood (2) has passive noise damping. The microphone (7) is disposed exteriorly on the hearing protector, while the loudspeaker is disposed inside the hood. The amplifier amplifies and transmits the signals from the microphone (7) to the loudspeaker. The noise damping of the hearing hood (2) is broad band. The frequency range of the amplifier corresponds to the frequency range of human speech. The amplification of the amplifier is variable and the greatest amplification is such that the sum total of the sound levels that are caused, on the one hand, by ambient sound passing through the hood (2) and, on the other hand, by sound from the loudspeaker amounts to a maximum, predetermined value.

La présente invention concerne un protecteur d'oreille comportant un capuchon d'écoute (2), un microphone (7), un haut parleur et un amplificateur. Le capuchon d'écoute (2) est caractérisé par un amortissement passif du bruit. Le microphone (7) est disposé à l'extérieur sur le protecteur d'oreille, tandis que le haut parleur est disposé à l'intérieur du capuchon. L'amplificateur amplifie et transmet les signaux du microphone (7) vers le haut parleur. L'amortissement du bruit du capuchon d'écoute (2) est à large bande. La plage de fréquences de l'amplificateur correspond à la plage de fréquences de la parole humaine. L'amplification de l'amplificateur est variable et l'amplification la plus importante est telle que la somme totale des niveaux sonores générés, d'une part, par le son ambiant traversant le capuchon (2) et, d'autre part, par le son provenant du haut parleur, est équivalente à une valeur prédéterminée maximale.

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