| 摘要 |
PURPOSE:To enable mutual communication with guaranteed private call, by locating a receiver and a transmitter in the housing having the ear hook part and hooking the housing on the ear. CONSTITUTION:A receiver 2 and a transmitter 3 are located in the housing 4 providing an ear hook section 1 hooked to the ear and an ear insertion hole 101 to which the ear is clipped. The privacy of call is assured through mutual talking by hooking the housing 4 to the ear. Except the cord 5 of the housing 4, a dial button 6, sounder 7, hook switch 8, and unit cord 9 are mounted on the housing 4 and dial function is given to the housing 4. Variable loss circuits 12, 13 and comparison circuit 11 are provided with the audio switch circuit 10 to constitute the side tone 15 at the anti-side tone circuit 14 less than 0 dB. Further, the telephone set is made small in size and light in weight for the ease of ear hook, and the removal is made free with free hands. |
