| 摘要 |
A headset receiver comprises a cartridge (10) containing all electronic receiving functional parts, and a passive case (32) which serves a protective envelope for the cartridge while conducting sound from the cartridge through acoustical stems (52) to a listener's ears. The case, which contains no active components and is a low cost disposable item, is designed to serve as a sanitation envelope for the cartridge. It is to be separated from the cartridge at the end of an airplane flight, removed from the aircraft, and disposed of or, alternatively, sanitized and repackaged with a new battery and fresh earpads, and returned to another passenger. To secure the cartridge from theft or misplacement, a lanyard (26) tethers the cartridge to a passenger's seat (28).
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