3pEA5. Energy flow and intensity flux in sound fields.

Session: Wednesday Afternoon, December 4

Time: 3:00

Author: Jiri Tichy
Location: Acoust. Dept., Penn State, University Park, PA 16802


The radiation and propagation of sound energy is represented by time-dependent instantaneous intensity. The concept of sound energy particles and their trajectories is discussed. The time-averaged flux of acoustic energy is represented by acoustic intensity. When measuring sound power radiation the knowledge of intensity fields is important for the selection of measurement points to achieve the desired precision of sound power determination. The near-field intensity of typical sound radiators is shown and the issues of sound power measurements are discussed.

ASA 132nd meeting - Hawaii, December 1996