The Sound Level at 1

Multiple Choice

The sound level at 1.0 m from a certain talking person talking is 60 dB.You are surrounded by five such people,all 1.0 m from you and all talking equally loud at the same time.The threshold of hearing is .What sound level are you being exposed to? You can neglect any absorption,reflection,or interference of the sound.The threshold of hearing is 1.0 × 10^-12 W/m².

A) 300 dB
B) 60 dB
C) 74 dB
D) 67 dB
E) 81 dB