Dynamic Range
The span between a listener's threshold of hearing and their uncomfortable loudness level, representing the usable range for amplification.
Full Definition
In aural rehabilitation contexts, dynamic range refers to the difference in decibels between the softest sound a person can detect (hearing threshold) and the level at which sound becomes uncomfortably loud (uncomfortable loudness level, or UCL). A reduced dynamic range, common in sensorineural hearing loss with loudness recruitment, constrains the space within which hearing aids must deliver amplification. Rehabilitation clinicians use this measure to guide compression settings and counsel patients on listening expectations. Editors working on hearing aid literature should ensure that 'dynamic range' is not conflated with signal-to-noise ratio or frequency range.
Usage
Usage note: Always expressed in decibels (dB). Do not abbreviate to 'DR' without first defining the acronym in clinical documentation.
In Context
- "The patient's dynamic range of only 30 dB HL made wide dynamic range compression essential for comfortable amplification." — Hearing aid fitting report
- "The rehabilitation program notes must specify whether 'dynamic range' refers to the acoustic or perceptual measurement." — Program documentation review