Abstract: There is disclosed an acoustic driver having a phasing and compression plug and its direct coupling to an acoustic waveguide having an entry throat with a non-unity aspect ratio, such as a rectangular diffraction slot. The phasing and compression plug has an input end with an input surface having a plurality of input apertures configured in a parallel array of spaced-apart chordal slits. The opposite, output end of the plug has a like plurality of output apertures contained in an output region having unequal length and width dimensions such that the area of the output region is less than that of the input surface. A plurality of passages through the plug body connect each respective input aperture to the corresponding output aperture wherein the relative lengths of the passages are preselected to provide an acoustic wavefront which is concave at its major (vertical) axis and planar or convex across its minor (horizontal) axis.

Abstract: The disclosure relates to what may aptly be termed "genderless", or "hermaphroditic", or perhaps "unisex" electrical connectors, and more particularly to such an electrical connector having a keying system which minimizes the chance of two incompatible cables being connected together.

Abstract: A time domain panner samples a single analogue audio input signal and digitizes it into a 16-bit linear PCM representation which is fed into a memory array having a plurality of memory locations. A multiplexer feeds this memory array and continuously cycles in response to an address counter which repetitively counts to a maximum count. Address words produced by the address counter may address the array with or without add words, and a selected channel of the multiplexer points to a value stored in the memory array at a location established by the address counter plus an offset. Analogue output signals provided from left and right analogue output channels are time shifted selectively with respect to the analogue input signal and with respect to each other. Accordingly, analogue audio input signals are provided by a single signal source, fed into a memory array, and left and right analogue output channels are time-shifted with respect to the input excitement, and with respect to each other.