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14 questions
Find the word which has different sound in the underlined part.
measure
leather
algea
feather
What cause noise pollution?
People take public transport.
People turn down TV.
The traffic makes too much noise.
The traffic makes too many fumes.
Choose an image with noise pollution
What causes noise pollution?
sounds of cars
factories noise
harmful gases
loud concerts
A sound absorbing material
paper
polystyrene
metals
................should be created around hospitals
schools
silent zone
ground
Extremely harmful sound for human health
above 20 decibels
above 60-65 decibels
above 80 decibels
above 30 decibels
Sound which is pleasant to the years is a result of .............
reflection of sound
Non uniform periodic vibrations
Uniform periodic vibrations
The quality of sound is known as
timbre
pitch
frequency
amplitude
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