| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of improving the sound quality for simultaneous use of an incoming transmitting function with vibration and an incoming transmitting function with voice in transferring the incoming through a vibration actuator usable for portable telephones, etc. SOLUTION: A controller of a vibration actuator previously records the frequencies and the quantities of distortions caused when a vibration signal and a voice signal are superposed one on the other and inputted to the controller. Based on the data the controller has recorded, distortions are removed from the superposed signals to output vibration signals and voice signals, thus improving the quality of reproduced sounds.
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