acoustic reflectometry

acoustic reflectometry

Diagnostic technique for the detection of middle ear effusion. It measures the level of sound transmitted and reflected from the middle ear to a microphone located in a probe tip placed against the ear canal and directed toward the tympanic membrane.
References in periodicals archive ?
Acoustic reflectometry is a non-invasive technique based on the capture and later analysis of reflections produced by impedance changes in cylindrical pipes.
In the case of a flat readout, the tie breaker should come from the visual exam and/or the use of spectral gradient acoustic reflectometry (code 92567).
The 80 papers consider such topics as combining color constancy and gamma correction for image enhancement, haptic guidance using primitives for executing virtual robotic tasks, a neighborhood hybrid structure for optimizing mechanical properties of a microalloyed steel based on its chemical composition, the robust fractional digital control of a first-order plus integrator process, an experimental platform of a physical model for a quadrotor helicopter, a simulation model to solve the forward problem in acoustic reflectometry, and three basic geometries of rings containing microstrip antennas.
Marcy prefers acoustic reflectometry using the EarCheck device, which gives a sonar picture of the tympanic membrane.
Exclusion criteria were the presence of a tympanic membrane perforation and/or a pressure equalization tube and a failure to undergo all testing, which included diagnostic audiometry (including tympanometry), pneumatic otoscopy, and acoustic reflectometry.
While EarCheck is for home use, it is based on the same patented and proven technology, acoustic reflectometry (or sound waves), used in doctor's offices since 1997 and included in the American Academy of Pediatrics' and American Academy of Family Physicians' Clinical Practice Guideline for the Diagnosis and Management of Acute Otitis Media (middle ear infection).
The guidelines were not written to apply to infants younger than 6 months, and in the youngest infants, tympanometry and acoustic reflectometry may be less accurate.
Acoustic reflectometry (EarCheck) detects middle ear fluid via sound reflections from the middle ear.
MDI Instruments was founded in 1994 to commercialize applications of patented acoustic reflectometry technology for detection of middle ear fluid (otitis media with effusion - OME) and ear infection (acute otitis media - AOM).
Both tympanometry and spectral gradient acoustic reflectometry (EarCheck Pro) can detect middle ear effusion in about two-thirds of patients with documented effusions.
To be included in the study, the patients had to have clinical evidence of an ear infection as well as evidence of middle ear fluid by acoustic reflectometry, and they could not have ear tubes.
Tympanometry or acoustic reflectometry cannot diagnose AOM for you either.