Which is correct option for ear protection equipment?
A) Headphone
B) Use of cotton in ears
C) Ear defeders ,Ear plugs
D) All the above
Correct Answer:
Verified
Q1: Main sources of noise pollution are
A)Transportation equipment
Q2: The sound can travel in air when:
A)Particles
Q3: White noise is random noise that has
Q4: Which among the following has a constant
Q6: The technique or method to absorb undesirable
Q7: When sound interacts with materials and boundaries,
Q8: Soft materials absorb a large amount of
A)Heat
Q9: Reflection coefficient (?) is the rario of
Q10: Absorption coefficient (?) is the rario of
Q11: Which best describe the sound wave?
A)It may
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