| 摘要 |
PROBLEM TO BE SOLVED: To excite pleasure mind of user or to increase a range of the uses of a microphone by measuring and displaying inputted voice. SOLUTION: A voice signal adjusted in the level by a microphone amplifier 4 is rectified to DC voltage by a rectifier 5, and a DC quantity inputted to a microcomputer 6 is logarithmically transformed into a sound pressure value. A voice level 'high score' recorded in the past is stored in a memory with which the microcomputer 6 is provided. A measured value of an input voice level 'high score' is compared with the 'high score' stored in the memory at the moment for being updated. A measured sound pressure value is displayed on a monitor 3 screen like 'sound pressure level 5dB', etc., as well as 'high score' by controlling an on-screen display processor 8 by means of the microcomputer 6. Further, it is also displayed on a main body display part 10 through a display driver 9 connected with the micro computer 6. |
