In this way, hearing level and speech discrimination can be tested.
通过这种方式,可以测试听力水平和言语辨别能力。
英语百科
Hearing level
Hearing level is the sound pressure level produced by an audiometer at a specific frequency. It is measured in decibels with reference to audiometric zero. Hearing of speech is considered to be impaired when the hearing level is shifted 25 dB or more.