| 摘要 |
A compact telephone, which may be fastened to a user's wrist by means of a strap 310, 320, includes a case 100 having an upper portion 110 that is hinged along one edge to a lower portion 210. A receiver transducer 140 is embedded within the upper portion on the side opposite the hinge, and a microphone transducer 240 is embedded within the lower portion on the side opposite the hinge so that the distance between them is maximized when the case is opened. By providing such separation, inter-transducer distance is increased, and this results in improved signal-to-noise performance. Such performance is further improved by using a directional microphone which is more responsive to sounds coming from the direction of the user's mouth than from other directions. |
