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12 Cards in this Set
- Front
- Back
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Sound |
The effect of pressure changes in air caused by vibration or turbulence |
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Noise |
Unwanted sound |
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Amplitude |
The amount of sound pressure measured in decibels |
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Frequency |
The rate of vibration. Per unit time measured in cycles per second, more commonly known as hertz range of normal perception for young person is 20-20,000 Hz |
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Decibel (dB) |
Scale is a log-based scale developed to quantify sound |
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Effects of noise |
Hearing loss- noise will first produce a temporary loss of hearing, but gradually with more exposure, this loss becomes permanent Tinitisz a continual ringing in the ears |
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Non-auditory effects |
A while set of body responses with unknown long-term consequences: Quickening pulse rate Narrowing of blood vessels Higher blood pressure Secretion of hormones Muscle contractions |
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Noise regulation 1910.95 |
* Employee exposure to noise is limited. Duration is regulated according to sound pressure level *if the 8-hour time weighted average noise exposure exceeds 85 NBA then a gearing conservation program must be created and administered |
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Hearing conservation Amendment to PEL |
Hearing conservation Amendment (HCA) 1981-1983 *recognition the PEL was not protective *action level =50% of PEL = hearing conservation program require * criteria level= 90dBA *threshold level= 80dBA *exchange rate = 5dBA |
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NAPA 704 |
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Means of egress |
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Oshawa standards to become familiar with... |
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