A speaker is playing music at 75 decibels. A second speaker playing the same music at the same decibel reading is placed beside the first. What is the decibel reading of the pair of speakers?
A)150 decibels
B)180 decibels
C)98 decibels
D)78 decibels

Question

Quizplus · Accepted Answer

When two sound sources of the same level are placed together, the total sound level only increases by about 3 decibels, in this case giving a total decibel reading of 78. Option A and B are incorrect as they involve doubling or more than doubling the sound level, which is not accurate in this scenario. Option C is also incorrect, as two sound sources of the same level do not add up to exactly the same level.

A Speaker Is Playing Music at 75 Decibels