Design and characterization of parabolic acoustic dish

Usually, a reflector dish with a loudspeaker or a microphone placed at its focal point is used in directed acoustic systems to determine the direction in which the acoustic wave is transmitted or received, in addition to improve the gain in the acoustic transmission or reception. As the parabolic reflector dish with an oval aperture has significant advantages, and there is no relationship between parameters of this dish and some variables that have direct influence on acoustical emission or reception of this dish, this work is intended to find this relationship, and this is achieved by carrying out a theoretical and experimental study to find the optimum utilization of this dish in directed acoustic systems.

Study and characterization of acoustic gain of parabolic reflector

The parabolic reflector is used in directed acoustic systems, with the aim of gettingdirectivity, as well as increasing the gain in transmission and reception. Therefore, a theoretical study was carried out to describe the factors that affect the gain of the parabolic dish in the acoustic field. The frequency-gain relationship was experimentally obtained using a parabolic dish with an elliptical aperture, in addition to the analysis of the factors that led to the deviation of the experimental relationship from the theoretical relationship.