| 摘要 |
A voice communication unit for communicating though a barrier includes an outer audio unit including an outer voice sensing device and an outer voice reproducing device, an inner audio unit including an inner voice sensing device and an inner voice reproducing device, and a signal processing unit which connects the inner/outer audio units and includes a extraneous-sound reducing unit. The input/output sound paths respectively from the outer voice sensing/reproducing devices are separated by a predetermined distance to minimize the interference. In addition to the noise elimination, the invention provides a voice communication unit with weatherproofness by adjusting the size of and disposing the openings for the sound paths. The voice communication unit can be adapted to a two-way communication channel that carry information in both directions, but not at the same time, or to a two-way communication channel that carry information in both directions at the same time.
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