Noise And Vibration

Question 1

Noise is…

Answer 1

Unwanted sound

Question 2

Frequency is _____referred to as _____

Answer 2

Sound waves, Pitch

Question 3

A hertz is one oscillation per

Answer 3

Second

Question 4

Intensity is the _____ or ____ of an acoustic event

Answer 4

Loudness or magnitude

Question 5

What is a decibel

Answer 5

Ratio of sound measured as the lowest sound pressure detectable by a normal human ear at 1000 hertz

Question 6

Intensity threshold at which humans are susceptible to permanent hearing loss

Answer 6

85db

Question 7

The threshold for pain due to loud noises is

Answer 7

130db

Question 8

Physical damage to the ear occurs at noise levels of

Answer 8

150db and above

Question 9

Conductive hearing loss occurs when

Answer 9

One of the parts of the year that is designed to transmit mechanical energy fails. An example is a ruptured eardrum

Question 10

Sensorineural hearing loss occurs when

Answer 10

The hair cells of the cochlea are damaged destroyed or degenerated due to overexposure to noise

Question 11

Temporary threshold shift is a

Answer 11

Non-permanent loss of hearing and a frequency range of frequencies after exposure to loud noises

Question 12

Permanent threshold shift occurs when

Answer 12

the cochlea is unable to convert a certain frequency or frequencies to electrical signals is loss because of hair cell damage

Question 13

Excessive noise can increase

Answer 13

Fatigue levels, irritability, distraction and uncooperativeness

Question 14

The best protection from noise uses a

Answer 14

Combination of protective devices

Question 15

Symptoms of exposure to vibration include

Answer 15

Loss of appetite, complacency, perspiration, salivation, nausea, headache and vomiting

Question 16

We can reduce the effects of vibration by

Answer 16

Stretching, changing position, lumbar support, seat harnesses, and physical fitness levels