| 摘要 |
An earpiece adapted to transmit acoustic sound into an year, the earpiece having a flexible ear canal engagement member that is adapted to be repositioned longitudinally inwardly by way of some form of an extension member. When the extension member is released, the member contracts to a first position, thereby increasing a portion of its cross-sectional diameter at some portion thereof to engage the ear canal of a user's ear to securely fit the device to the user's ear.
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