Article

Evaluation of Active Occlusion Effect Cancellation using Subjective, Probe Tube and Coupler Measurements (en)

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* Presenting author
Day / Time: 07.03.2023, 15:40-16:20
Room: Foyer Z, Posterinsel K
Typ: Poster
Session: Audiologische Akustik (Posterinsel K)
Information: Die Poster werden durchgängig von Dienstag bis Donnerstag im Foyer auf Ebene Z ausgestellt (3.OG vor dem Plenarsaal Z), sortiert nach thematischen Zusammenhängen in der hier angegebenen Posterinsel (siehe Sitzungstitel). Das Posterforum zur angegebenen Zeit bietet die Möglichkeit, mit den Autor*innen in Diskussion zu kommen.
Abstract: Users of hearing aids, headphones and other ear-worn devices frequently experience an unnatural or "boomy" sound of their own voice. This is caused by the occlusion effect, i.e., an amplification of body-conducted voice components at low frequencies, and an attenuation of air-conducted high-frequency components. While the classic method to reduce the occlusion effect is to partially open the ear canal, previously demonstrated active control of the ear canal sound pressure to improve own-voice perception, referred to as Occlusion Effect Cancellation (OEC), is now provided by several commercial active noise control earphones. We evaluated the OEC functionality of four earphones by means of subjective ratings, probe tube measurements in real ears and measurements in a prototype coupler that features a simulation of body- and air conducted own voice components. Results show substantial benefits of OEC that differ between the devices, and that the various effects of ear canal occlusion across the whole frequency range have to be compensated for satisfactory own-voice quality. Measurements in the prototype coupler approximate the occlusion effects measured in real ears and may be a useful complement to tedious and potentially unrealiable probe tube measurements in human subjects.
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