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Science - Grade 5: Noise Pollution
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11/03/23
WHAT IS NOISE POLLUTION? Not all sound is considered noise pollution. The World Health Organization (WHO) defines noise above 65 decibels (dB) as noise pollution. To be precise, noise becomes harmful when it exceeds 75 decibels (dB) and is painful above 120 dB.
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Gidemy Educational Video Network
11 Lượt xem · 22/12/24
Gidemy Educational Video Network
5 Lượt xem · 22/12/24
Gidemy Educational Video Network
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Gidemy Middle School
28 Lượt xem · 11/03/23
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