| 摘要 |
PURPOSE:To broadcast voice and music individually or mixedly with an easy procedure by incorporating a tape recorder in a part of an electric megaphone and coupling these inputs and outputs. CONSTITUTION:An output from a microphone 2 is inputted to a mixer 8 through an operating switch 6 for a pre-amplifier 7 and an output from the tape recorder 5 is also inputted to the mixer 8 through the operation switch 6. The output of the mixer 8 is inputted to a trumpet type speaker 1 through a power amplifier 9. When an operation switch 6a is turned on a contact position, voice from the microphone is broadcasted similarly to the ordinary speaker. When an operation switch 6b is turned on the contact position, reproduced sound from the tape recorder is amplified and broadcasted from the speaker. When an operation switch 6c is turned on the mixed contact position, the voice signal from the microphone is mixed with the reproduced signal from the tape recorder and the mixed signal is broadcasted from the speaker. When an operation switch 6d is turned on the contact position and the tape recorder is turned on the recording state, the output of the microphone is recorded on a tape by the tape recorder. |
