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. 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.