EAR MUFFLER

摘要

A passive semi-insert noise reducing device configured for insertion into the ear of a subject includes at least one muffler tube having a closed end and an opposing open end, the muffler tube being configured to be secured to the head of a subject. The at least one muffler tube is defined by an elongate hollow tubular section, including the closed end, and a transverse hollow tube at the open end that is configured for placement in the outer ear of the subject. The at least one muffler tube is defined by a length that produces quarter wave resonance in low audible sound frequencies. A soft sealing member disposed onto an exterior surface of the hollow connecting tube has a distal end surface that is substantially flush with the open end of the muffler tube.

主权项

1. A passive semi-insert device that engages against the ear canal, for reducing the effect of ambient noise, the semi-insert device comprising:
at least one muffler tube having a closed end and an opposite open end, the at least one muffler tube being configured to be secured to the head of a subject and comprising:
an elongate hollow tubular section including the closed end;a transverse hollow tube extension at the open end which is configured to engage against the ear canal of the subject, the at least one muffler tube being defined by a length that provides quarter wave resonance in low audible sound frequencies; and a sealing member disposed onto an exterior surface of the transverse hollow tube extension, the sealing member having a distal end surface that is substantially flush with the open end of the muffler tube in order to create a seal against the ear canal and in which the sealing member is held against the ear canal using a head band that provides a compressive force.