at the ears. With the closure of the ears, the inertial force component perpendicular to the eardrum surface disappears, allowing the inertial force to more easily lift the eardrum. As a consequence, the eardrum will be less likely to be damaged by vibrations, particularly by high frequency ones.
Another purpose of this invention is to provide an inertial lock for the eardrum-in-the-ear-canal, which is easy to operate, and yet 6add127376 bertmaki
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