Problem 1: Noise (15 Points) A core cutter located near the wall of a core shack 5 m x 5 m x 2.5 m in dimension. Due to the noise coming from the core cutter, the room was built of concrete walls and floor and an acoustic material in the ceiling. The sound power level is in the room is 110 dB. a. Calculate the room constant if the reverberation time is 0.35 second. (3 points) b. Calculate the sound pressure level at door located 3.75 m opposite the core cutter and at the middle of the room 1.5 m from the core cutter. (6 points) If a ventilation fan is located on the wall near the door just below the ceiling opposite the core cutter with a sound power level of 98 dB, what is the combined sound pressure level at the center of the room? (6 points) C