| 摘要 |
An ear bud earphone for use with a feedback noise cancellation system has a speaker and a microphone positioned anteriorly of the speaker. A cushion is provided exteriorly of a housing of the earphone. The cushion has a first region having a first acoustic transmission property, and a second region having a second acoustic transmission property comprising a greater impedance to transmission of audible sound than the first acoustic property. In one embodiment the first region is provided for contact with an inner ear surface, and the second region is provided between the first region and the housing. The cushion can be provided as a separate article.
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