Acoustic Immittance, Absorbance, and Reflectance in the Human Ear Canal
نویسندگان
چکیده
منابع مشابه
Acoustic Immittance, Absorbance, and Reflectance in the Human Ear Canal.
Ear canal measurements of acoustic immittance (a term that groups impedance and its inverse, admittance) and the related quantities of acoustic reflectance and power absorbance have been used to assess auditory function and aid in the differential diagnosis of conductive hearing loss for over 50 years. The change in such quantities after stimulation of the acoustic reflex also has been used in ...
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OBJECTIVE Accurate ear-canal acoustic measurements, such as wideband acoustic admittance, absorbance, and otoacoustic emissions, require that the measurement probe be tightly sealed in the ear canal. Air leaks can compromise the validity of the measurements, interfere with calibrations, and increase variability. There are no established procedures for determining the presence of air leaks or cr...
متن کاملMeasurement of acoustic impedance and reflectance in the human ear canal.
The pressure reflectance R (omega) is the transfer function which may be defined for a linear one-port network by the ratio of the reflected complex pressure divided by the incident complex pressure. The reflectance is a function that is closely related to the impedance of the 1-port. The energy reflectance R (omega) is defined as magnitude of [R]2. It represents the ratio of reflected to incid...
متن کاملCharacterizing the ear canal acoustic impedance and reflectance by pole-zero fitting.
This study characterizes middle ear complex acoustic reflectance (CAR) and impedance by fitting poles and zeros to real-ear measurements. The goal of this work is to establish a quantitative connection between pole-zero locations and the underlying physical properties of CAR data. Most previous studies have analyzed CAR magnitude; while the magnitude accounts for reflected power, it does not en...
متن کاملEstimation of Stapedius-Muscle Activation using Ear Canal Absorbance Measurements
The stapedius muscle, which is located in the middle ear, goes into contraction when the ear is exposed to high sound intensities. This muscle activation is called 'the acoustic reflex'. Measurement of the acoustic reflex is clinically of importance since it can reveal diagnostic information about the middle ear's pathologies. Moreover, this muscle-activation alters the acoustic characteristics...
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ژورنال
عنوان ژورنال: Seminars in Hearing
سال: 2015
ISSN: 0734-0451,1098-8955
DOI: 10.1055/s-0034-1396924