Abstract: Re-bouncing collision model between steel ball and glass plate is established, the equations for the measurement of both coefficient of restitution and acceleration due to gravity are obtained. The pulsed acoustic signals with the assistant of acoustic sensor while each collision is acquired. Finally, the measurements of both coefficient of restitution between steel ball and glass plate and free-fall acceleration are performed.

Key words: restitution coefficient, gravitational acceleration, falling ball, DISLab