Free Acoustic Bass Trap Depth Calculator
Calculate quarter-wave (λ/4) absorber thickness, air gap placement, and optimal material flow resistivity to absorb room modes and standing waves.
🔊 Room Resonance & Problem Frequency
📊 Optimum Absorber Thickness & Air Gap
Recommended Tools & Equipment
Tested hardware and components for high reliability
Frequently Asked Questions
Why are corner bass traps more effective than flat wall panels?
In an enclosed room, all three axial room modes (length, width, height) terminate simultaneously in the trihedral room corners, concentrating maximum low-frequency pressure in the corners.
Does an air gap behind an acoustic panel improve bass absorption?
Yes! Mounting a 4-inch panel with a 4-inch air gap behind it performs nearly as well as an 8-inch solid panel, because it positions the absorbing material out in the high-velocity zone without the added cost of insulation.
Can acoustic foam absorb low bass (under 100 Hz)?
No. Standard 1-inch and 2-inch acoustic foam wedges only absorb high and upper-mid frequencies (above 500 Hz). They have virtually zero absorption below 150 Hz and will make a room sound dark and boomy.
What is the speed of sound used for acoustic calculations?
At 68°F (20°C) at sea level, the speed of sound in air is approximately 1,125 feet per second, or 343 meters per second.