Most Comfortable Level
Also written as: MCL — Most Comfortable Level
The intensity level at which a patient judges speech or a tone to be most comfortable to listen to, expressed in dB HL.
Full Definition
Most Comfortable Level (MCL) is the sound-pressure level, measured in dB HL, at which a listener perceives speech or a test signal to be optimally comfortable—neither too soft nor too loud. It is determined through ascending and descending intensity sweeps or through patient-directed adjustment, and it serves as a reference point for setting hearing aid gain and for deriving the dynamic range of hearing. MCL typically falls roughly midway between the speech recognition threshold and the uncomfortable loudness level. Editors must distinguish MCL from threshold measures and ensure it is not conflated with 'preferred listening level,' which may differ across signal types.
Usage
Usage note: Abbreviate as MCL only after first-use expansion; do not confuse with 'minimum cognition level' in neuropsychology documents.
In Context
- "The audiologist established an MCL of 55 dB HL before proceeding with suprathreshold word recognition testing." — Diagnostic audiology report
- "MCL and UCL measurements were recorded to define the patient's dynamic range for amplification fitting." — Hearing aid candidacy documentation