Home » If threshold of hearing is 0.0002 bar, what will be the SPL in decibels if sound pressure is 200 μ bar? Noise Pollution MCQs If threshold of hearing is 0.0002 bar, what will be the SPL in decibels if sound pressure is 200 μ bar? May 4, 2022 44 Views Q. If threshold of hearing is 0.0002 bar, what will be the SPL in decibels if sound pressure is 200 μ bar? A. 110 B. 120 C. 130 D. 140 Answer: 120