earmold

An earmold, or ear mold, is a custom-fitted shell or insert that sits in the outer ear and, when needed, extends into the ear canal. It is used to interface acoustic devices such as behind-the-ear hearing aids and in-ear monitors, and can also serve as protective earplugs for noise reduction or water activities. Custom earmolds provide a secure, sealed fit that helps control acoustics and reduce feedback.

Manufacture begins with an ear impression taken by a clinician using a quick-setting silicone or alginate material. The impression captures the shape of the outer ear and canal to create a negative mold. A laboratory then pours acrylic resin or silicone elastomer into the impression to form the positive earmold, trims it for comfort, adds vents or tubing as required, and finishes the surface to match skin tone or device.

Common configurations include full-shell earmolds, which cover the concha and canal; half-shell molds, and canal-only inserts. Earmolds can be vented or non-vented to balance pressure, moisture, and sound transmission. Materials include hard acrylic for durability and softer silicone for comfort, with options for color and grip.

Applications include fitting behind-the-ear hearing aids, in-ear monitors, and specialized hearing protection. Earmolds improve device retention, seal, and acoustic performance, reduce feedback, and can customize low-frequency response. For musicians and swimmers, earmolds may be used with plugs designed for sound attenuation or moisture protection.

Care involves regular cleaning with mild soap and water, avoiding alcohol or solvents, and drying thoroughly. Inspect for cracks or deformations and replace worn or grown molds as advised by a clinician, typically on a schedule that reflects ear growth and device use.