| 摘要 |
PURPOSE:To surely detect the chatter of acoustic apparatus without operating the apparatus itself by applying vibrations from the outside by way of a vibrating bar which vibrates under desired frequencies and detecfting the chatter. CONSTITUTION:The vibrating bar 9 of a vibrator 1 which is provided with voice coil, etc. vibrating according to the output frequency of a low frequency oscillator 16 having been requlated to an arbitrary frequency is contacted to the desired position of the cabinet 18, etc. of an acoustic apparatus, then the vibrations of the bar 9 are transmitted to the cabinet 18, etc. In case said cabinet 18 etc. has chatter, the high frequencies differing from the number of vibrations having been applied to the cabinet 18 etc. are generated. Hence, the detection of chatter may be readily and surely performed without operating the electronic apparatus itself. |
