If one lawn mower causes an 80-dB sound level at a point nearby,four lawnmowers together would cause a sound level of ____________ at that point.
A)92 dB
B)84 dB
C)86 dB
D)none of the above

Question

Quizplus · Accepted Answer

When four lawnmowers are running together, the sound level they produce would be 6 dB higher than the sound level produced by a single lawnmower. This is because the sound levels add up logarithmically. Thus, 80 dB + 6 dB = 86 dB. Therefore, the correct answer is option C) 86 dB.

If One Lawn Mower Causes an 80-DB Sound Level at a Point