| 摘要 |
PURPOSE:To make talk reception of high quality possible by providing each of input signal systems, which correspond to two receivers for right and left ears, with at least not less than one of a reverberating circuit, phase-shifting circuit and amplifying circuit. CONSTITUTION:A received input signal from terminal 1 is branched to both right and left ear systems and then inputted to reverberating circuits 2 and 3 differing in reverberating characteristics. Output signals of circuits 2 and 3 are inputted to phase-shifting circuits 4 and 5 and delayed in time with control signals from terminals 6 and 7. This delay time changes according to time and the phase difference between signals of both right and left ear systems reaches a fixed value at a certain frequency. Output signals of circuits 4 and 5 enter amplifying circuits 8 and 9, where the gain difference between both right and left ear systems is changed at constant cycles with control signals from terminals 10 and 11. Thus, a called subscriber can receive the sound of a calling subscriber and the sound image of an acoustic signal with localization and sense the movement of the sound image, so that reception of high quality can be attained. |
