【摘要】 利用运动物体反射声波与原声波合成后产生拍 ,用数字存储示波器测定拍频 ,从而测定空气中的声速或运动物体的速度 ,并给出了相应的实验装置、实验方法 .更多还原

【Abstract】 The reflected sound wave from moving object and original sound source are compounded, then the beat wave frequency is produced and processed through a digital memory oscilloscope, at last, the velocity of the object is gotten using this method, and the corresponding device structure is also given.更多还原