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人耳听音的频率范围为20Hz～20kHz。在声学测量中不可能测量这个范围中的每一个频率,而总是在某一频率区间取特定值进行测量,这个频率区间称为频带。频带由上限频率f2和下限频率f1确定,f2,f1又称为截止频率。f2、f1的间隔可以用频率比或以2为底的对数表示,称为频程。若一个频带中上限频率
Human ear listening frequency range of 20Hz ~ 20kHz. It is impossible to measure every frequency in this range in acoustic measurement, and always take a specific value in a certain frequency range for measurement. This frequency range is called frequency band. Frequency band by the upper limit frequency f2 and lower limit frequency f1, f2, f1, also known as the cut-off frequency. f2, f1 interval can be frequency ratio or logarithm of the base 2, known as the frequency range. If the upper limit of a frequency band