Abstract: Loudspeaker parameters are measured separately for various forward and rearward cone displacements, using a test signal that permits measurement of parameters at various degrees of either forward or rearward cone movement. The test signal uses a brief frequency sweep signal such as a logarithmic sweep signal, in combination with a very low frequency (VLF) audio tone having a fundamental frequency below, e.g., 10 Hz. The very low frequency audio tone may have a sine wave shape, a square wave shape or a clipped sine wave shape.

Abstract: A wall mounting device for a flat panel display includes a wall bracket and a mounting bracket. The wall bracket is adapted to be directly coupled to a wall and includes a top rail and a bottom rail. The mounting bracket is adapted to be coupled to the flat panel display, and includes first and second plate members connected to each other and defining an upper end and a lower end. At the upper end, the mounting bracket includes a hook to engage the top rail of the wall bracket. At the lower end, the mounting bracket includes a spring clip that selectively engages the bottom rail of the wall bracket.

Abstract: A wall mounting device for a flat panel display includes a wall bracket and a mounting bracket. The wall bracket is adapted to be directly coupled to a wall and includes a top rail and a bottom rail. The mounting bracket is adapted to be coupled to the flat panel display, and includes first and second plate members connected to each other and defining an upper end and a lower end. At the upper end, the mounting bracket includes a hook to engage the top rail of the wall bracket. At the lower end, the mounting bracket includes a spring clip that selectively engages the bottom rail of the wall bracket.