| 摘要 |
A mobile phone has a transmitter coil forming a first part of an inductive link for forwarding sound signals received by the mobile phone and an earpiece for fitting into an ear canal and having a housing of which at least a proximal portion can fit within the ear canal. The housing contains a receiver coil forming a second part of the inductive link for receiving sound signals from the transmitter, an amplifier for amplifying the sound signals received by the receiver coil, a transducer for reproducing the received sound signals; and a space for a battery. The amplifier has means responsive to received signal level for squelching its output at low levels of detected signal.
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