| 摘要 |
PURPOSE: A user recognition type signal switching device of a handsfree system is provided to enhance a speech quality by comparatively judging an intensity of a sound in a car, sensing a position of a user where the strongest voice signal is generated and operating an audio speaker closest to the user. CONSTITUTION: When signals are inputted through signal input units(10), each being formed as a microphone installed at each seat in a car, a comparator(70) compares the amplitude of each input signal and selects a signal with the largest amplitude. A controller(30) connected to a mobile phone by a jack receives a signal from the mobile phone and transmits a signal outputted from the comparator(70) to the mobile phone. As a contact connected to an audio unit(50) is separated by signals from the comparator(70) and the controller(30), a switching unit(40) connects a circuit to an audio reproducing speaker(60). The switching unit(40) includes a plurality of relays(40a-40n) respectively connected to the speaker(60).
|
