Ways To Reduce Reflections And Interference - TDT Medusa4Z User Manual

c (m/s) f (Hz)
- -
343.2 4000
343.2 8000
343.2 16000
343.2 32000

Ways to Reduce Reflections and Interference

To reduce reflections and interference:
1. Increase the distance of travel for the reflections by changing the angle of incidence. If the
angle of incidence is near a corner but not focused directly at a corner, the reflections will
bounce off both walls and scatter throughout your chamber rather than bounce off one wall
before converging at the center of the chamber.
2. Increase the damping factor by covering hard surfaces (metal, tile, wood, plastic, etc.) with
soft, spongy, non-reflective, sound absorbing materials (carpet, foam, etc.).
The walls and table top in Figure 4 are covered by 1 inch foam pads with 1 inch tall pyramid
projections (total thickness of 2 inches) for increased scattering.
λ (mm) ∆ (mm)
c/f
λ/4
85.8 21.45
42.9 10.725
21.45 5.3625
10.725 2.68125
Figure 4 - A sound chamber used for testing and calibrating speakers
Sound Chamber Fundamentals | 52