background severe birth asphyxia (apgar < 7 at the 5th minute of birth) is recognized as a hearing loss risk factor by the joint committee on infant hearing (jcih). about half of the newborns with hearing loss do not indicate any sign and risk factor at birth. accordingly, the joint committee recommended performance of hearing screening test in 2000, especially for babies born with risk factors...

LONGITUDINAL OUTCOMES OF DISTORTION PRODUCT OTOACOUSTICEMISSIONS AND WIDEBAND REFLECTANCE IN INFANTSbyVIRGINIA RAMACHANDRANDecember 2012Co-Advisors: Dr. Jean E. Andruski and Dr. Kenneth R. BouchardMajor: Communication Sciences and DisordersDegree: Doctor of PhilosophyClinical practice has shown that some infants are born with, or develop atemporary conduc...

UNLABELLED Infants should be submitted to hearing screening upon birth, and for the results to be complete, it is necessary to assess middle ear conditions. OBJECTIVE To check whether the type of breastfeeding in infants between zero and four months can impact middle ear conditions my means an ENT assessment and acoustic immittance comparing neonates who were submitted to hearing screening wi...

Background: The possible role of cochlear function in tinnitus generation is still a matter of debate. To assess the role of outer hair cell dysfunction in tinnitus and its possible relationship with ultra-high frequency (UHF) hearing sensitivity, transient evoked otoacoustic emissions (TEOAE) and UHF hearing thresholds were investigated in normal hearing individuals with and without tinnitus. ...

Reflection-source otoacoustic emission phase-gradient delays are widely used to obtain noninvasive estimates of cochlear function and properties, such as the sharpness of mechanical tuning and its variation along the length of the cochlear partition. Although different data-processing strategies are known to yield different delay estimates and trends, their relative reliability has not been est...

The siliceous nature of the Mowry Shale distinguishes it from many well-studied organic-rich mudstones Cretaceous Western Interior Seaway. Available models organic enrichment in rarely incorporate detailed biomarker, bulk organic, inorganic, and mineralogy data. Here, we used these data to evaluate how variations matter source, productivity, dilution, preservation modulated accumulation during ...

Objective: To evaluate the frequency of hearing impairment and prenatal, antenatal, postnatal variables associated with in neonates at Indus hospital Karachi. Study Design: Prospective, Observational, Cohort study. Setting: Department Pediatrics Neonatology, Sheikh Saeed Memorial Campus (SSMC) Hospital Health Network (IHHN) Karachi, Pakistan. Period: July 2020 to June 2022. Material &amp; Metho...

DFNB1 locus has been linked to a nonsyndromic “invisible disability” called congenital sensorineural hearing loss and deafness. Mutations of GJB2 and GJB6 genes are associated with deafness at the DFNB1 locus. The diagnosis of DFNB1 is made with molecular genetic testing. DNA-based testing can be used both prenatally and postnatally. Purpose: To get evidence for implementation of newborn hearin...

A pervasive theme in the literature for the transient evoked otoacoustic emission (TEOAE) measured from the human ear canal has been one of the emission arising solely (or largely) from a single, place-fixed mechanism. Here TEOAEs are reported measured in the absence of significant stimulus contamination at stimulus onset, providing for the identification of a TEOAE response beginning within th...