Design otolaryngology chair's up-down assemble by applying link mechanism. And analysing the speed and accelerate of mechanism in CATIA's motion mechanism module to verify its actual running status. Draw the effective design, make the successful prototype.
Equipment Design ; Otolaryngology ; instrumentation

Exposure to intense noise has been identified as a potential risk in the development of hearing impairment. Social concern about excessive noise is increasing and this also extends to the operating room. A noise level study was performed in the operating room during mastoidectomy with a sound level meter and it was analyzed by a sound-analyzing program. The drilling instruments used included the Stryker, Midas, M.P.S. and Med-Next. The operator was exposed to sound levels from 69 to 83 dBA. The loudest drilling instrument was the Midas and it produced an average sound level of 83 dBA to the operator. The mean exposure time was 41 minutes during mastoidectomy. This is below the occupational noise-level regulations in Korea. However, considering that individual susceptibility to noise varies and that the otologic surgeon is repeatedly exposed to prolonged drilling noise, ear protection is recommended for the operators of high-speed drilling instruments.
Chronic Disease ; Human ; Mastoid/surgery* ; Noise*/adverse effects ; Otitis Media/surgery ; Otolaryngology/instrumentation*

In order to reduce the test time in real ear hearing-aid fitting for children, the validity of applying the average real ear to coupler differences (RECDs) in prefitting procedure using a 2cc coupler measurement system was evaluated by checking whether the majority of people's RECDs might occur within 5 dB of the average RECDs (N = 116) in each test frequency and age group. The percentages of occurrence were around 90% in test subjects' RECDs in saturation sound pressure levels (SSPLs) and around 70% in gain in each important test frequency. Appropriate test frequencies in prefitting are 500, 1000, 1500 and 2000 Hz.
Adolescence ; Adult ; Aged ; Child ; Child, Preschool ; Ear ; Hearing Aids* ; Human ; Infant ; Middle Age ; Otolaryngology/methods* ; Otolaryngology/instrumentation* ; Prosthesis Fitting/methods* ; Time Factors

This paper presents to you the principles, composition, features and applications of ET-100 measuring-training device for eustachian tube opening function.
Computers ; Deglutition ; physiology ; Equipment Design ; Eustachian Tube ; physiology ; Humans ; Otolaryngology ; instrumentation ; Signal Processing, Computer-Assisted ; Software ; Sound