Definition
A partial or complete reduction in the ability to detect or understand sound, which in the aviation environment can be caused or worsened by prolonged exposure to high noise levels from engines, propellers, slipstream, and cockpit equipment. It may be temporary or permanent, and it interferes with the reception of radio communications, instructor voice, alerts, and aircraft auditory cues.
Plain English
A drop in how well a person can hear. In aviation, it is often caused by long exposure to loud aircraft noise and can make it harder to hear radio calls, instructions, and warning sounds.
Context Anchor
Seen in human factors and external factors discussions, especially around aircraft noise, headset use, radio communication, and cockpit workload.
Why Pilots Care
It can reduce the ability to understand ATC instructions and other aircraft, increasing the risk of miscommunication and safety incidents.
Intuition Check
Hearing loss does not always mean being unable to hear at all. In aviation, even partial or temporary hearing loss matters if it makes important sounds harder to notice or understand.
Example Sentence 1
The instructor wore a noise-cancelling headset on every flight to reduce the risk of hearing loss over a long teaching career.
Example Sentence 2
During the medical exam the pilot reported no noticeable hearing loss that would affect radio communications.