Damage during development. Damage can also occur after birth as a result of severe jaundice. Long-term exposure to loud noise can also damage the cochlea and labyrinth, causing sensorineural hearing loss. Certain drugs, such as streptomycin and gentamycin, can damage the auditory nerve. The most ...
MINISTRY OF EDUCATION AND TRAINING MINISTRY OF HEALTH NATIONAL INSTITUTE OF HYGIENE AND EPIDEMIOLOGY NGUYEN TAI DUNG CURRENT STATUS OF HEARING IMPAIRMENT, SOME RELATED FACTORS AND EFFECTIVENESS OF PREVENTION BY Mg-B6 SUPPLEMENTATION IN SOLDIERS ARMOR 2017-2018 Major: Sociology and ...
Varies with the temperature and pressure of the material medium. The speed of sound at standard temperature and pressure is measured as 333m/s. - In reality, sound is created from many different sources. In space, sound waves travel freely in all directions. In a narrow space or with obstacles, ...
Presbycusis can reduce the hearing of a person over 50 years old by 0.5 to 1dB. In the study of the group > 50 years old, there were 2 cases accounting for 0.63%, so the effect of presbycusis on the rate of hearing loss is not much. 4.1.2.2. Prevalence of hearing loss a, General hearing loss ...
3.2.5. Degree of hearing loss in each ear in the study groups before and after intervention Table 3.34. Degree of hearing loss by ear in the study groups SGTL Intervention group (n = 100) Control group (n = 100) p (1,2) Before CT After CT (1) Before CT After CT (2) n % n % n % n % Right ear Normal ...
Figure 2.8. American AuDX cochlear sound meter Figure 2.9. GSI Pello Base audiometer (USA) Figure 2.10. Karl – Storz (Germany) ENT endoscopy system Figure 2.11. 350S Acoustic Booth - Amplivox (UK) 2.1.8.2. Standards for classifying hearing loss levels [35],[93] dB intensity Classify ≤ 20 Normal ...
In this study, the following measures were taken to attempt to limit errors: - The person conducting the hearing test is a technician from 108 Military Central Hospital who has been trained and practiced in hearing test procedures according to a unified process. - Audiometers are highly accurate ...
