| 摘要 |
PURPOSE:To allow a user to select an output speaker freely by providing a changeover switch for automatic and manual modes and a speaker changeover switch selecting directly the output speaker respectively to the changeover device. CONSTITUTION:The mode changeover means 12 provided with a changeover switch switch 12a for automatic and manual modes for switching test tone and with a speaker changeover switch 12b selecting the output speaker of a test tone in the manual mode is provided to the test tone changeover device. That is, the changeover switch switch 12a for automatic and manual modes is set to the manual mode and the user operates the speaker changeover switch 12b selecting an output speaker 16. Thus, a speaker outputting a test tone freely is selected and the changeover speed of the speaker is selected freely. |
