We measured the amplitude of the tuning fork by laser time-averaged holographic interferometry and the frequency by Vibration Meter Type & 2511 and observed the vibration mode with photoelectric scanning method .

我们尝试了用音叉作为一个简单的空间频率调制器，用时间平均全息干涉法测量了 音叉的振幅，并测量了它的频率，用光电扫描法观测了其振动模式。