Acoustic sensor for use in breathing masks

A - Human Necessities – 62 – B

Patent

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Details

A62B 18/08 (2006.01) A62B 7/14 (2006.01)

Patent

CA 2674459

A breathing mask adapted to be placed over a wearer's face, comprises a mask body including a gas inlet port to be disposed in flow communication with the wearer's breathing passage for flow of a gas in a predetermined flow stream there through upon inhalation by the wearer; a communications microphone (30) mounted to said mask body to capture the voice of the wearer, said communications microphone generating sound signals; an attenuation device (34) for attenuating said sound signals; a sound monitor (36) for monitoring the intensity of sound near the communications microphone in a predetermined frequency range, connected to a controller device (38) for activating the attenuation device when the sound intensity monitored by the sound monitor is in a predetermined level range.

La présente invention concerne un masque respiratoire pouvant être placé sur le visage de l'utilisateur, qui comprend : - un corps de masque comprenant un orifice d'entrée de gaz à placer dans une communication de flux avec le passage respiratoire de l'utilisateur pour le flux d'un gaz dans un débit prédéterminé en cas d'inhalation par l'utilisateur, - un microphone de communications (30) fixé sur le corps de masque pour capturer la voix de l'utilisateur, le microphone de communication générant les signaux sonores, - un dispositif d'atténuation (34) pour atténuer les signaux sonores, - un moniteur du son (36) pour surveiller l'intensité du son près du microphone de communication dans une plage de fréquences prédéterminée, raccordé à un dispositif de contrôleur (38) pour activer le dispositif d'atténuation lorsque l'intensité sonore surveillée par le moniteur sonore se trouve dans une plage de niveau prédéterminé.

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