Subjective tinnitus is the perception of sound in the absence of an external source. Tinnitus is often accompanied by hearing loss but not everyone with hearing loss experiences tinnitus. We examined neuroanatomical alterations associated with hearing loss and tinnitus in three groups of subjects: those with hearing loss with tinnitus, those with hearing loss without tinnitus and normal hearing...

Distortion product otoacoustic emissions (DPOAE) were measured in normal-hearing and hearing-impaired human subjects. Analyses based on decision theory were used to evaluate DPOAE test performance. Specifically, relative operating characteristic (ROC) curves were constructed and the areas under these curves were used to estimate the extent to which normal and impaired ears could be correctly id...

BACKGROUND The Auditory steady state response (ASSR) provides a frequency-specific and automatic assessment of hearing sensitivity and is used in infants and difficult-to-test adults. OBJECTIVES The aim of this study was to compare the ASSR thresholds among various types (normal, conductive, and sensorineural), degree (normal, mild, and moderate), and configuration (flat and sloping) of heari...

In animals with bilaterally normal hearing, olivocochlear pathways can protect the cochlea from the temporary shifts in hearing sensitivity (temporary threshold shifts; TTSs) caused by short-duration intense loud sounds. The crossed olivocochlear pathway provides protection during binaural loud sound, and uncrossed pathways protect when monaural or binaural loud sounds occur in noise background...

the low-frequency speech information is because low frequency information may also be carried by high frequency fibers through temporal coding. Thornton & Abbas compared the speech recognition ability of 3 subjects who were identified with a low frequency dead region and 5 normal-hearing individuals in various filtered conditions. In the unfiltered condition, the speech scores were 56% to 88% f...

introduction: hearing impairment and hearing loss are kinds of latent handicap in children. any abnormality in hearing can affect different aspects of life. otoacoustic emissions have been accepted as an appropriate method for screening of hearing loss in neonates. in this study we assessed the hearing status of infants admitted in icu wards in yazd.materials and methods: this was a cross-secti...

In this study, the performance of 48 listeners with normal hearing was compared to the performance of 46 listeners with documented hearing loss. Various conditions of directional and omnidirectional hearing aid use were studied. The results indicated that when the noise around a listener was stationary, a first- or second-order directional microphone allowed a group of hearing-impaired listener...