Review Conceptual Example $8$ as background for this problem. A loudspeaker is generating sound in a room. At a certain point, the sound waves coming directly from the speaker $($without reflecting from the walls$)$ create an intensity level of $78\mathrm{.}4$ dB $.$ The waves reflected from the walls create, by themselves, an intensity level of $66\mathrm{.}2$ dB at the same point. What is the total intensity level? $($Hint: The answer is not $144\mathrm{.}6$ dB $.$