hearability

Hearability is a term used to describe how easily a person can hear sounds, especially speech, in a given acoustic environment. It combines audibility—the ability to detect a sound at a given level—with intelligibility—the ability to understand it—and is influenced by the listener’s hearing thresholds, dynamic range, cognitive processing, and the signal’s spectral and temporal properties as well as background noise.

Although not a formal diagnostic category in standard audiology, hearability is used in clinical and consumer contexts as a practical shorthand for the accessibility of audible information in everyday listening.

Assessment related to hearability includes pure-tone audiometry for audibility, and speech audiometry or speech-in-noise tests for intelligibility. Speech intelligibility indices, real-ear measurements, and aided thresholds help quantify how amplification or processing affects audibility. Self-report measures of listening effort and ease of listening capture functional aspects of hearability.

Factors influencing hearability include the degree and configuration of hearing loss, age, cognitive function, attention, and auditory processing; environmental factors such as noise and reverberation; and assistive devices like hearing aids and cochlear implants, whose processing aims to maximize audibility and minimize listening effort.

In some markets, hearability is used in marketing to describe a device’s ability to convey speech in typical environments, but it is not standardized and its meaning can vary.

See also: audibility, speech intelligibility, hearing loss, hearing aid, cochlear implant, audiometry, noise, reverberation.