Use of Pressure Gradient Receivers in a Correlator Receiving System
Melvin J. Jacobson, Robert J. Talham · The Journal of the Acoustical Society of America · 1959
An analysis is made of a steerable correlator receiving system which contains two directional receivers of the pressure gradient type. The axes of the receivers are oriented in the broadside direction. The output signal-noise ratio is computed and compared with that of a system employing two omnidirectional receivers. The directional receiver system gives a maximum improvement in output ratio for broadside signal sources which increases as the orders of the receivers increase. The range of improvement over source direction is also studied. Other results include the fact that the maximum output signal-noise ratio of the directional receiver system containing two receivers of order 1 (2,3,4,⋯) is equal to that of an array correlation system requiring the use of 6 (10,14,18,⋯) omnidirectional receivers.