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Sound is made by ...
vibration
Loud volume is made by ... vibrations.
big
Soft volume is made by ... vibrations.
small
High-pitched sound is made by ... vibrations.
fast
Low-pitched sound is made by ... vibrations.
slow
We can make a guitar produce sound by ... the string.
plucking
We can make a flute produce sound by ... the flute holes.
blowing
To make a beautiful sound on guitar, we need to ... the strings.
tune
To make different pitches in the flute, we need to ... some holes in the flute.
close
The sound that is too loud, we called ...
noise pollution
Give me an example of noise pollution.
Examples of noise pollution are traffic, horns, etc.
We use ... to prevent noise pollution at home.
curtains
Construction workers use ... to prevent noise pollution.
ear mufflers
Unit measurement of sound is ...
decibel
dB means ...
decibel
The average sound that we can hear is ... dB.
85
