256 Essentials of Industrial Hygn What is the maximum noise level in decibels of

Question

256 Essentials of Industrial Hygn What is the maximum noise level in decibels of a 200 W per channel? er that is rated a 9. receiver is rated a from this s 10. The root-mean-square sound pressure level (SPL) of the 11. The NRR for a pair of earplugs is 24 dBA, and ts ye in a work area is 100 dBA. At how many decibels will., Weighed 8o N/m2. What is the maximum noise level in decibels f reduce the noise level using ACGIH's safety factor of 22 heeaplue levels listed 12. If you want to install five machines with the individual no below, what would the total noise level be? Machine SPL (SBA) 86.0 88.1 88.1 82.2 84.5 13. What is the frequency of the sound emitted from a fan with 35 bl ades operating at 4,000 rpm? 14. What perce nt of the OSHA criterion allowable dose does a worker receive if she works in an area with 100 dB for 0.5 hours, 70 dB for 4 hours, 90 dB for 3.0 hours, and 10S dB for 0.5 hours? 15. What is sensorineural hearing loss, and why is it typically irreversible? 16. The audible range of an average young person with unimpaired hearing is a. 4,000-8,000 Hz b. 1,000-10,000 Hz c. 16,000-20,000 Hz d. 2,000-4,000 Hz 17. OSHA requires audiograms for all employees exposed to an 8 dBA. weighted average of to an 8-hour time

Explanation / Answer

Problem 15)

Sensorineural hearing loss results from damage to the tiny hair cells in the inner ear. Causes of sensorineural hearing loss can be age, noise and diseases.

Everybody loses these tiny hair cells in the cochlea throughout life, while the hearing gradually becomes less acute. However, the hair cells can also be damaged by excessive noise. As a result of prolonged exposure to high intensity noise either from the work environment or from listening to loud music, sensorineural hearing impairment is becoming more common.

It is irreversible since it can't be treated and it is permanent deafness.

Problem 16)

Audible range for average young person is 16000 - 20000 Hz

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