Investigations on the physical factors influencing the ear canal occlusion effect caused by hearing aids

The occlusion effect refers to the altered perception of one's own voice when the ear canal is fully or partially obstructed. While the loudness increase due to body conducted sounds requires an assessment by psychoacoustic methods, the ratio of sound pressure inside the ear canal with occluded versus open ear canal for the same internally generated signal can be measured physically. This paper aims at better understanding the occlusion effect from a physical viewpoint and at determining the influence of different physical factors on the own voice perception, introducing a simple and intuitively understandable model for this phenomenon. Based on this model, the dependency of the occlusion effect on (i) the geometries of the individual ear canal and the vent, (ii) the insertion depth of the occluding object and (iii) vocalization are discussed.


Published in:
ACTA ACUSTICA UNITED WITH ACUSTICA, 100, 3, 527-536
Year:
2014
Publisher:
Stuttgart, Hirzel Verlag
ISSN:
1610-1928
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2013-06-27, last modified 2018-03-17

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