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一、声现象概述声现象过程如图1所示。知识梳理物体的振动是发声的本质。物体及其结构决定声的音色,振动的幅度决定响度,振动的频率决定音调。声依靠介质(固、液、气)传播能量与信息,传播的速度v_固>v_液>v_气,在15℃,空气中的声速v_(空气)=340 m/s。人的听觉(耳朵接收声音的频率范围)为20~20 000 Hz远大于发声范围85~1 100 Hz,应用有声纹锁、消声器、钢琴与长笛等;而
First, the sound phenomenon Overview Sound phenomenon process shown in Figure 1. Knowledge combing the vibration of objects is the essence of vocalization. The object and its structure determine the tone of the sound, the amplitude of the vibration determines the loudness, and the frequency of the vibration determines the pitch. Sound relies on the medium (solid, liquid, gas) to spread energy and information, the speed of propagation v_ solid> v_ liquid> v_ gas, at 15 ℃, the air velocity v_ (air) = 340 m / s. Human hearing (the frequency range over which the ear receives sound) ranges from 20 to 20,000 Hz, which is much larger than the sounding range from 85 to 1 100 Hz, with vocal locks, mufflers, piano and flute;