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20 Cards in this Set
- Front
- Back
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What is white noise?
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White noise is sound containing all audible frequencies
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Sound frequency is measured in what?
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hertz = Hz
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What is pitch?
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Pitch is the human sensation or perception of highness or lowness of tone.
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Sound intensity is measured in what?
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dB
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Doubling the sound power will raise the sound pressure level how many dB's?
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3 dB
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Human ear is ___ sensitive to low frequency sound and ___ sensitive to high frequency sound
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Less
More |
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What is the function of the outer ear?
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Funnels noise
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What is another word for the tympanic membrane?
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Ear drum
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What are the 3 bones in the middle ear called?
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The hammer
The anvil The stirrup |
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What is the main function of the middle ear?
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Protects inner ear
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What is another name for the inner ear?
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The cochlea
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What is the Inverse Square Law as it relates to Sound Intensity?
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Every time the distance from the sound doubles, the level of sound decreases by 6 dB.
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What is stereophony?
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The ability to localize the direction from which sound waves are emanating
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What is the ability to localize the direction of sound?
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Stereophony
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What is unwanted sound called?
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Noise
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What are two technical ways hearing is lost?
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Nerve deafness: damage/degeneration of hair cells in organ of corti
Conduction deafness: some condition of the outer or middle ear that affects trasmission to inner ear |
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By OSHA regulations, exposure to any sound at or above ____ dB causes the listener to incur a partial noise dose
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80 dBA
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An employer is required to implement a hearing plan at an 8-hour TWA of _____ dBA
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85
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An employer is required to take steps toward noise reduction at ___ dBA
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90
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When warnings are sent, or when the message calls for immediate action what type of display should be used?
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Auditory
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