earmould
A custom-made coupling device fitted to the ear canal and concha that connects a behind-the-ear hearing aid to the ear and influences the acoustic properties of amplification.
Full Definition
An earmould is an individually fabricated shell, typically of acrylic or silicone, that is seated in the outer ear to deliver amplified sound from a behind-the-ear (BTE) hearing aid into the ear canal. Its design—including vent diameter, bore shape, and material—significantly affects the frequency response received by the listener. Venting, for example, allows low-frequency sound to escape, reducing occlusion and modifying the aided response. Editors should note the preferred British spelling is 'earmould' while the American spelling is 'earmold'; consistency within a document must be maintained according to the target audience. The term should not be confused with a dome, which is a non-custom pre-formed coupling used in open-fit devices.
Usage
Usage note: 'Earmould' (British) vs. 'earmold' (American) — ensure consistency throughout the document per the target style guide. Distinguish from non-custom domes used with receiver-in-canal devices.
In Context
- "The audiologist ordered a new earmould with a 2 mm vent to reduce the occlusion effect reported by the patient." — Hearing aid fitting note
- "Earmould tubing should be replaced every six months to prevent acoustic degradation." — Patient maintenance guide