| 摘要 |
PURPOSE:To provide the electric machine with a sound eliminating function which can eliminate a sound with good adaptivity without ineffective power consumption. CONSTITUTION:When the machine is stopped, a driving control means makes an indication so that the operation of an active sound elimination device 1 is also stopped, and an electroacoustic transducer is controlled corresponding to the output of a sound elimination monitor to perform proper sound elimination, eliminate the generation of an abnormal sound, and evade ineffective power consumption. |
