People Development & Environment Environmental Issues Pollution

જો ધ્વનિ ________ થી વધુ હોય તો ધ્વનિ પ્રદૂષણ સર્જાય છે.

1

80 - 100 dB

2

50 - 60 dB

3

70 - 75 dB

4

70 - 75 dB

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