| 摘要 |
An ear bud type earphone 1 comprises a cushion with first 7 and second 8 regions having different acoustic properties. The second region may have greater acoustic impedance than the first region and may be located between the first region and the housing 3 of the earpiece. The cushion may be provided as a separate unit. The intra aural earphone may comprise both a speaker 4 and a microphone 2 and the microphone may be provided in front of the speaker and adjacent (in use) to the user's ear canal. A noise cancelling system for an earphone comprising both a speaker and a microphone is also disclosed. |
