The active earcanal
Oliveira, R.J.
Journal of the American Academy of Audiology 8(6): 401-410
1997
ISSN/ISBN: 1050-0545 PMID: 9433686 Document Number: 477584
In the past, the human earcanal has primarily been thought of as a passive conduit for sound. Several studies, reported here, explored evidence of how active the earcanal is. The "active earcanal" is conceptualized and aspects of it are viewed through three timeframes: jaw-induced canal change in seconds/minutes, cerumen production in weeks/months, and aging in years. The influence of each of these aspects on hearing aid performance and resulting patient satisfaction is explored. A new self-assessment tool, a Profile of Hearing Aid Physical Fit, is proposed that focuses on measuring patients' perceptions of those benefits that depend on the interface between earcanal and hearing aid.
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