In transmission-line models of cochlear mechanics, predictions about otoacoustic-emission delays depend on the place- or wave-fixed nature of the emission generation mechanism. In this work, transient evoked otoacoustic emissions (TEOAEs), recorded at different stimulus levels in 10 young subjects, were analyzed using wavelet-based time-frequency analysis to determine the latency of each freque...

A number of commercial distortion product otoacoustic emission (DPOAE) systems are available. Each system uses a slightly different signal processing approach . As a result, calculations commonly used to quantify the quality of collected DPOAE data (such as noise level and signal to noise ratio) differ across systems. In this report, the theory underlying DPOAE noise estimation is reviewed and ...

Active cochlear micromechanisms, involved in auditory sensitivity, are modulated by the medial olivocochlear efferent system, which projects directly onto the organ of Corti. Both processes can be assessed non-invasively by means of evoked otoacoustic emissions. Animal experiments have revealed top-down control from the auditory cortex to peripheral auditory receptor, supported by anatomical de...

Millions of people have the perception of sounds when no external sound is present: for many of them the“TINNITUS” (medical word from Latin) or “ACUFENE” (from Greek) is the trouble so severe to alter their quality of lifedeeply. Starting from 1998 we are carrying on with success an integral program of diagnosis, medical and rehabilitant treatment of the Tinnitus with a new multi therap...

background and aims: this is a pilot study investigated the prevalence of hearing impairment and the impact of the known risk factors for hearing loss on infants at risk born in kuwait. methods: two hundred infants with risk of hearing impairment who met the joint committee on infants hearing (1990) criteria were screened. all newborns were included in this study if they had hospital stay for m...

This critical review evaluated eight studies examining otoacoustic emissions (OAEs) in normal hearing individuals with Type I diabetes mellitus (DM) to determine if they are effective for characterizing subclinical auditory impairment as a result of the disease. All were prospective, non-randomized clinical cohort studies. Results indicate that despite normal hearing thresholds, otoacoustic emi...

Click-evoked otoacoustic emission (CEOAE) input/output (I/O) functions were measured in ears with normal hearing and in ears with sensorineural hearing loss above 2000 Hz. The low- to midfrequency CEOAEs obtained from the ears with high-frequency hearing loss were significantly reduced in level compared to the CEOAEs obtained from the ears with normal hearing even though there were no significa...

Two studies were aimed at developing the auditory steady-state response (ASSR) for universal newborn hearing screening. First, neonates who had passed auditory brainstem response, transient evoked otoacoustic emission, and distortion-product otoacoustic emission tests were also tested with ASSRs using modulated tones that varied in frequency and level. Pass rates were highest (> 90%) for amplit...

Click-evoked otoacoustic emissions (CEOAEs) and acoustical responses evoked by bandlimited Gaussian noise (noise-evoked otoacoustic emissions; NEOAEs) were measured in three normal-hearing subjects. For the NEOAEs the first- and second-order Wiener kernel and polynomial correlation functions up to the sixth order were calculated by cross correlating the noise stimulus and the emission response....

Cigarette smoking is a well known health problem affecting various body organs. There is a dearth of literature on early changes in auditory functioning at high frequency due to smoking. Hence, the present study aimed to investigate the audiological parameters for 100 chronic smokers. Their results were compared to 50 non smokers. Audiological test battery included conventional pure tone audiom...