| 摘要 |
Certain embodiments of the present technology provide a sound attenuator for reducing high level sounds within the ear canal while maintaining high audibility for lower level sounds. The sound attenuator comprises a housing with a passageway for passing external sound, a damping member to restore resonance within a plugged ear, and a disc interposed across the passageway. The disc comprises a cavity, at least one hole through said disc and a flexible diaphragm positioned across the cavity. At a sound pressure level less than that of a predetermined value the flexible diaphragm expands upon an increase in the external sound pressure level maintaining a near constant level of attenuation. For sound pressure levels at or greater than that of the predetermined value the diaphragm contacts the interior surface of the cavity, thereby limiting the flexibility of the diaphragm and increasing the level of attenuation provided by the attenuator.
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