Question

23. In a class of 100 students each shouting at
100 dB. Find noise level of class?
1) 10dB 2) 100dB 3) 12dB 4) 120dB​

Answer 1

Answer:

10 dB represents a tenfold increase in intensity.So, in case of 10 students, the noise level will be (100+10) dB and when the students are 100, the noise level will be 100+10+10 i.e 120 dB..............

Answer 2

total dB of 100 students is 100dB.

so one student dB is 100/19