Some BTE hearing aids house the hearing aid receiver in the component worn behind the ear. Other BTE hearing aids actually house the receiver right in the earmold! These hearing aids are called receiver-in-ear (RIE) hearing aids.
Most earmolds are manufactured with either small or large open vents–depending on the needs of the patient. Earmolds with larger vents are known as open fit, and are recommended for patients with good hearing in the low pitches. The vents allow the low frequencies to exit the hearing aid naturally. Large venting also contributes to more natural sound quality and less occlusion, or “stuffy” feeling.
It's important that your earmolds fit well, work with your hearing loss and hearing aids, match your level of dexterity, look cosmetically appealing, and feel comfortable for an extended period of time.
Custom earmolds are also worn for reasons besides hearing loss. They can be worn to prevent hearing damage during “loud” activities such as playing or listening to music, racing cars, hunting, and so on. Also, they're used by certain professionals, such as doctors, pilots and newscasters. Custom-fit Bluetooth® earmolds give everyone the benefits of hands-free and comfortable phone conversation. And earmolds paired with MP3 players let you move freely without “losing” your earbuds.