Anechoic chamber
The laboratory contains a large (64 m3) anechoic chamber which is equipped for a whole range of bioacoustic, psychophysical and neurophysiological investigations. This chamber has an insertion loss of better than 30dB for sound frequencies greater than 100Hz rising rapidly to greater than 60dB above 500Hz. It is anechoic down to 200Hz (better than 99% absorption). The anechoic chamber is equipped with a robot arm carrying a small speaker that can be placed at almost any location on the surface of an imaginary sphere (radius 1.2 m) surrounding a test subject located in the middle of the chamber. The robot arm is fully automated with micro-stepper motor controllers and has a placement accuracy of better than 0.1 degrees.
