论文部分内容阅读
25.声波作用于大气使大气压强发生变动的变动量称为声压。() 26.正常人刚刚能听到的最微弱声音的声压为20Pa,称为人耳的“听阈”。() 27.使人耳产生疼痛感觉的声音的声压为2×10~(-5)Pa,称为人耳的“痛阈”。() 28.声源在单位时间内向外辐射的总能量称为声功率,单位为W。() 29.与声波传播相垂直的方向上单位面积、单位时间内通过的声能量,称为声强。()
25. Sound waves acting on the atmosphere to make changes in atmospheric pressure change is called sound pressure. () 26. The weakest sound that a normal person can just hear is sound pressure of 20 Pa, called the “hearing threshold” of the human ear. () 27. The sound pressure that makes the human ear feel pain is 2 × 10 -5 Pa, which is called the “pain threshold” of the human ear. () 28. The total energy radiated by the sound source in unit time is called sound power in W. () 29. Acoustic wave propagation perpendicular to the unit area, the unit of time through the sound energy, known as the sound intensity. ()