What does the term "occlusion effect" refer to in hearing aids?

The term "occlusion effect" in the context of hearing aids refers to a sensation often experienced by wearers, characterized by a feeling of pressure or blockage in the ear. This phenomenon occurs when sounds that would normally escape from the ear canal, such as the wearer's own voice or certain environmental noises, are instead blocked by the hearing aid. The occlusion effect can create an unnatural auditory experience, leading to discomfort or the perception of one's voice sounding different than it typically does.

Understanding this effect is crucial for hearing aid fitting and orientation, as it highlights the importance of selecting the appropriate ear mold or device configuration to minimize discomfort and optimize the user's experience. It emphasizes the need for audiologists and dispensers to evaluate and adjust hearing aids properly to minimize the occlusion effect and ensure that users find their devices comfortable and effective.