| 摘要 |
PURPOSE:To collect sound without intermission by providing a switching means which uses a voice signal from a wireless microphone as an output signal when a discrimination signal inputted from a reception state discrimination means representing an excellent reception state and uses a voice signal from a wire microphone as the output signal when the signal represents a defective reception state. CONSTITUTION:A detection section 19 judges that a carrier reception state is defective when an output level of a rectifier section 18 is higher than a set level. A signal representing the discrimination result in the detection section 19 is converted into a switch changeover signal by a switching signal output section 21 and fed to a changeover switch 14. The changeover switch 14 following a switching signal from a squelch section 10 selects an input signal (c) to a recording and reproduction section 15 into a signal (a) from a wireless microphone 1 or a signal (b) from a built-in microphone. When the reception of a carrier is restored normal and the noise component level in the low frequency signal of a frequency discrimination section 9 is lower than the set level, the changeover switch 14 selects the connection of the signals (a) and (c). |
