REHS Exam – Noise- Questions and Answers 100% Accurate(RATED A+)
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Course
REHS
Institution
REHS
Sound - ANSWER-Amplitude: loudness
Frequency: pitch
Time pattern
Loses energy as it travels
Noise - ANSWER-unwanted sound
Noise pollution - ANSWER-noise that has characteristics and duration injurious to public health & welfare
-unreasonably interferes with life and property
Decibel ...
REHS Exam – Noise- Questions and Answers 100% Accurate(RATED A+)
Sound - ANSWER-Amplitude: loudness
Frequency: pitch
Time pattern
Loses energy as it travels
Noise - ANSWER-unwanted sound
Noise pollution - ANSWER-noise that has characteristics and duration injurious to public
health & welfare
-unreasonably interferes with life and property
Decibel - ANSWER-express intensity of sound
Noise level - ANSWER-measurement in dBA by sound meter
dB scales - ANSWER-dBA: loudness in normal situations
dBC: loudness in noisy situations
dBD: effect of airplane noise
Combining 2 sound sources - ANSWER-difference between sound level
0 difference: add 3
>10 difference: insignificant
Noise dosimeter - ANSWER-measures amount of potentially injurious noise exposure over time
Noise control - ANSWER-1. Source
2. Transmission path
3. Where received
drops 6dB each time distance from source to received is doubled
Noise threshold of pain - ANSWER-120 dBA
Source control - ANSWER-Engineering
-planning and design
-isolation
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