TDT Medusa4Z User Manual page 53

Important
The external shell is metallic and tied to earth ground, which doubles as a Faraday cage that will shield against
electromagnetic radiation.
The floor and walls in Figure 5 are covered in soft, absorbing surfaces (1.75 inch foam
padding) with significant damping power. The speaker and subject are aligned slightly off-axis
with the wall to maximize scattering.
The speaker orientation in Figure 6 is an example of poor sound chamber preparation for two
reasons. First, the speaker is angled directly at the floor, so the stimulus will be reflected
Figure 5 - An example of a good sound chamber
Figure 6 - An example of a bad sound chamber
Sound Chamber Fundamentals | 53