Directional reception of broadband signals by means of ultrasonic transducer arrays

This paper presents a new approach to the theory and technique of ultrasonic transducer arrays, which makes it possible to obtain their directional beam patterns for receiving broadband acoustical signals. The general formulae were derived for the beam pattern of the array, and as an example the beam patterns of the end-fire array have been computed and plotted, for signals of different correlation function. For experimental verification of the theory the simple processor solution is proposed. This technique is based on spatial/temporal signal processing for beamforming of the directional response of an end-fire array.