分贝(db):在声学测量中,经常使用分贝作为度量声压级、声强级、声功率级的单位,其定义:声强比的常用对数单位的十分之一,称为一分贝(db)。 赫芝:频率单位,频率是每秒钟振动的次数。 声压:声波在空气中传播,引起周围空气周期住的压缩和稀疏,产生了压力变化,单位面积上的压力变化 Decibel (db): In acoustic measurements, decibels are often used as the unit of measurement of sound pressure level, sound intensity level and sound power level, and its definition is that one tenth of the common logarithmic unit of sound intensity ratio is called decibel (db). Hertz: Frequency unit, frequency is the number of vibrations per second. Sound pressure: sound waves in the air, causing the surrounding air cycle live compression and sparse, resulting in pressure changes, pressure changes per unit area