Lê Quốc Trần Anh Coordinator
06/04/2018 at 11:10-
¤« 07/04/2018 at 14:39The difference between the loud rock concert and the normal conversation is 120-60=60 dB. It's 3 times of 20 dB. Because every increase of 20 dB corresponds to sound becoming 10 times as loud, the rock concert must be 10 × 10 × 10 = 1000 times as loud as the normal conversation.
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FC Alan Walker 07/04/2018 at 04:25
The difference between the loud rock concert and the normal conversation is 120-60=60 dB. It's 3 times of 20 dB. Because every increase of 20 dB corresponds to sound becoming 10 times as loud, the rock concert must be 10 × 10 × 10 = 1000 times as loud as the normal conversation.