<p>In various embodiments, a system is used to provide an apparatus configured to measure sound in an ear canal of a wearer's ear at a distance from a tympanic membrane of the ear. The sound is measured and received by the apparatus to produce a signal. A frequency analysis is performed on the signal to determine output as a function of the frequency and to determine the frequency of the minima (null). Further, a distance equal to a quarter wavelength of the null frequency is calculated. A correction factor associated with the quarter wavelength is retrieved and applied to the output to generate a corrected output. An estimated sound pressure level at the tympanic membrane from the corrected output is produced.</p>
申请公布号
WO2010016925(A1)
申请公布日期
2010.02.11
申请号
WO2009US04528
申请日期
2009.08.07
申请人
STARKEY LABORATORIES, INC.;RECKER, KARRIE, LARAE;ZHANG, TAO;LIN, WEI LI