Environmental Science And Engineering2D
Noise Pollution and Control - Theory & Concepts
Fundamentals of acoustics, sound pressure levels, and decibel addition for environmental engineering.
Open the complete lessonDecibel Addition Simulator
Sound Pressure Levels (SPL) are logarithmic. You cannot simply add decibels together (e.g., 70 dB + 70 dB ≠ 140 dB). Instead, you must convert them to intensity ratios, add them, and convert back.
1
70 dB
2
70 dB
Total Combined Sound Pressure Level
73.0 dB