The acoustic compliance value is the static acoustic compliance value in acoustic impedance testing, which can be analyzed in conjunction with the tympanogram and acoustic reflex threshold measured with an acoustic conductance impedance meter in acoustic impedance testing to assist in diagnosing the nature of deafness. Acoustic impedance testing can be used to identify conductive and mixed hearing loss, as well as to assist in the diagnosis of otitis media and abnormal eustachian tube function. It includes static acoustic compliance value, tympanogram, and acoustic reflex threshold. Among them, the normal range of static acoustic compliance value is between 0.3 and 1.6 ml, reflecting the structural activity of middle ear sound transmission and the ability to accept sound. If the test result of the static compliance value is abnormal, it represents the possibility of otitis media effusion, abnormal Eustachian tube function, auditory ossicular chain adhesion and other diseases.