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Correct Answer: C) 20Hz.
Correct Answer: E) All of the above.
Correct Answer: D) Noise pollution.
Correct Answer: A) Noise pollution.
Correct Answer: A) Sleeplessness.
Correct Answer: D) Air pollution.
Correct Answer: A) Decibel.
Correct Answer: C) Indoor air pollution.
Correct Answer: C) Aircraft.
Correct Answer: C) Everyone uses insulation for their home.
Correct Answer: A) True.
Correct Answer: A) Prevent hearing loss.
Correct Answer: D) Deffness.
Correct Answer: A) The sound of an object falling from above.
Correct Answer: C) Hearing Loss.
Correct Answer: D) All of the above.
Correct Answer: C) Illness such as colds and flu.
Correct Answer: A) Hearing loss.
Correct Answer: B) Noise Pollution.
Correct Answer: C) Musical sounds.
Correct Answer: C) Wet Waste.
Correct Answer: A) Natural resource.
Correct Answer: C) Velvet cloth.
Correct Answer: A) Rise.