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US 2019/0159702 A1Published application
Methods for Correcting Otoacoustic Emission Measurements
OwnerKarolina Charaziak, Christopher Sherainventors
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OwnerKarolina Charaziak, Christopher Sherainventors
Estimating the term…
The methods disclosed herein enable calculating otoacoustic emission (OAE) pressure independent of the acoustic load imposed by the ear canal and the OAE probe measurement system, e.g., for hearing tests. The OAE pressure is calculated in a form of either the first outgoing wave at the eardrum, referred as emitted pressure level (PEPL), or as a Thvenin-equivalent OAE source pressure level (PTPL) at the eardrum, as derived from a simple tube model of an ear canal. In both methods the OAE sound pressure level (PSPL), ear canal reflectance (REC), OAE probe source reflectance (RS), and one-way ear canal delay (τ) are measured at the entrance of the ear canal with the OAE probe. In contrast to PSPL, both methods result in an emission pressure that is not confounded by the effects of the residual ear canal space or the impedance of the OAE measurement system.
A method for measuring otoacoustic emissions (OAEs) in a subject using an OAE probe, wherein the measurement is corrected for the subject's ear canal acoustics and for the OAE probe, the method comprising:
A method for calculating complex otoacoustic emission (OAE) emitted sound pressure (PEPL) at the eardrum, equivalent to a complex OAE pressure measured in an anechoic ear canal, the method compromising:
A method for calculating a load-independent Thévenin-equivalent complex OAE source pressure at the eardrum (PTLP), the method compromising:
Dependencies are inferred from the claim text.