中文说明：主要是针对声压级的时域计算。引起人耳听觉的可听声频率范围为20~20000Hz，在此频率范围内人耳可听到的声压或 声强相差很大。从听阈声压到痛阈声压，其声压值相差100 万倍。为了把上述宽广的范围压缩为使用中容易处理的范围，并考虑到人耳听觉响应通常与声音强度的对数成正比的关系，在声学中普遍使用对数标度来度量声压，称为声压级，其单位用分贝表示
English Description：
Is mainly aimed at time-domain calculation of the sound pressure level. People hearing the audible frequency range for 20~20000Hz, this frequency range sound pressure of human ears to hear orSound intensity varies. Threshold sound pressure pain threshold sound pressure, sound pressure level difference of 1 million times. In order to incorporate the broad range of compression to use in a manageable range, taking into account the human auditory system response usually sound intensity is proportional to the logarithm of the relationship, generally use a logarithmic scale to measure in acoustic sound pressure called sound pressure level, expressed in decibels