this paper deals with an inspection of defects including corrosion and leakage by acoustic emission (ae) in an oil tank floor. in contrast to intrusive methods such as magnetic flux leakage, eddy current or ultrasonic, there is no need to emptying and entering the tank in ae method in order to inspection. in this research ae investigation and ae source location is presented in detail. the resul...

In this study, the longitudinal and hoop tensile strengths of an industrial ±55° Glass Reinforced Epoxy (GRE) pipe with eighteen layers as well as the associated failure mechanisms are determined. To obtain the longitudinal and hoop tensile strengths values, three specimens are cut from the studied GRE pipe in each direction. A comparison is done between both the strength values, and the fractu...

1. Balkany TJ, Connell SS, Hodges AVet al. Conservation of residual acoustic hearing after cochlear implantation. Otol Neurotol 2006;27:1083-8. 2. von Ilberg C, Kiefer J, Tillein Jet al. Electric-acoustic stimulation of the auditory system. New technology for severe hearing loss. ORL; journal for oto-rhino-laryngology and its related specialties 1999;61:334-40. 3. Gantz BJ, Turner CW. Combining...

As a result of the cochlea's nonlinear mechanics, stimulation by two tones results in the generation of distortion products (DPs) at frequencies flanking the primary tones. DPs are measurable in the ear canal as oto-acoustic emissions, and are used to noninvasively explore cochlear mechanics and diagnose hearing loss. Theories of DP emissions generally include both forward and reverse cochlear ...

Complaints of noise annoyance are increasing in several areas of the working environment, particularly in open offices, schools and kindergartens. The noise levels seldom reach noise levels with risk of noise induced hearing loss, but the cause emerges from a complex interplay between the level and the character of the noise, the acoustics of the workplace, psychosocial stress-factors, and indi...

Consideration of a source of oto-acoustic emission in a cochlear model implies consideration of the types of waves that such a source can emit. One wave travels in the normal, forward, direction. As any other forward wave it undergoes little or no reflection and it eventually disappears completely because of dissipation. The other wave travels in the reverse direction and it appears to undergo ...