Background: Congenital malformations of the auricle are often combined with atresia of the outer ear canal and malformations of the ossicles, representing aesthetic as well as functional deficits. Optimal treatment should therefore address both aspects equally. This report describes a new approach, combining the reconstruction of the auricle with implantation of an active middle ear hearing aid...

Title of Document: MICROELECTRONIC CIRCUITS FOR NONINVASIVE EAR TYPE ASSISTIVE DEVICES Koranan Limpaphayom, Ph.D., 2009 Directed By: Professor Robert W. Newcomb Department of Electrical and Computer Engineering An ear type system and its circuit realization with application as new assistive devices are investigated. The auditory brainstem responses obtained from clinical hearing measurements ar...

The Veria operation is a non-mastoidectomy technique for cochlear implantation. It uses the transcanal approach to the middle ear and the cochlea. The steps of the procedure are: (1) endaural approach, that offers a wide accessibility to the middle ear structures; (2) inspection of the middle ear anatomy; (3) straightening of the postero-superior bony canal wall, which is usually concave; (4) p...

Longitudinal studies of hearing in workers in selected industries in Canada have shown that the effect of continuous high-level noise exposure is an increase in detection threshold of about 1 1/2 decibels per year. This is in contrast to 1/2 dB per year for non noise-exposed office workers in the same plants. Personal hearing protectors, in the form of ear plugs and muffs, have been chosen as a...

the exposure to electromagnetic field emitted by mobile telephones is increasing rapidly worldwide that causes side effects, including thermal and non thermal side effects. ear proximity to electromagnetic source may lead to greater damage and side effects, including hearing loss. this study was performed to assess the chronic effect of exposure to electromagnetic field of mobile telephones on ...

introduction: to reduce incidence of residual cholesteatoma following ear surgery; and to reduce the need for second look “open” mastoidectomy using endoscopic mastoidotomy. ten-year retrospective chart review of 249 primary cholesteatoma cases (1994-2004) with a minimum follow-up of two years.  the first objective was to evaluate the effectiveness of otoendoscopy in reducing the incidence of “...

BACKGROUND Noise-induced hearing loss (NIHL) is one of the most common occupational diseases and the second most common cause of workers' claims for occupational injuries. OBJECTIVE Due to high prevalence of NIHL and several reports of improper use of hearing protective devices (HPDs), we conducted this study to compare the effect of face-to-face training in effective use of earplugs with app...

A large-signal equivalent circu it for t he E saki or tu nn el diode is presented that characterizes t he dynamic a nd static response of t his semi condu ctor device. Nonlin ear differentia l equations are written on the model a nd a graphical-numerical solu t ion technique is described. An alog compu ter solut ions for t he nonlinear equ ations a re also discussed for various modes of operation.

Until recently, noise suppression for telecommunications has been associated, almost exclusively, with corded and mobile phones. These small hand-held devices assumed particular use-cases; where voice generally entered from a microphone near the mouth, while an output stream exiting from the other end of the device reached only one ear. Over the years, the need for ambient noise suppression for...