| 摘要 |
The present invention is a headphone or earmuff unit that has two main parts. The first main part is the stationary enclosure, which fits over the ear of the user. This part also has holes in it for the passage of exterior sound. The second main part is the movable enclosure, which fits over the holes of the stationary enclosure. Both enclosures are padded for sound suppression. The two enclosures are tied together by a screw mechanism with a knob. When the knob is turned the enclosures separate. This allows exterior sound to enter the stationary enclosure, and thus the ear of the user, in a controlled manner.
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