Abstract: This invention provides a signal synchronizer that is capable of minimizing the effects of multi-path reception. The signal synchronizer provides signal samples from a first signal source and a second signal source for generating an output signal. The signal synchronizer includes a memory for storing signal samples obtained from a first signal source and for storing signal samples obtained from a second signal source. Circuitry in the synchronizer determines a signal transit time difference between the first signal source and the second signal source. A readout controller then determines a memory offset from the signal transit time difference. The memory offset specifies a location in the memory from which to begin reading the signal samples obtained from the second signal source.

Abstract: This invention provides a spring loaded mounting mechanism for easily mounting and removing a loudspeaker housing within an opening in a surface. The mounting mechanism includes a shaft connected to the loudspeaker housing. Attached to the shaft is a spring actuated arm. The actuated arm is compressed inward toward the housing by the side walls of the surface surrounding the opening when the housing is being positioned within the opening. At a certain point when the housing is inserted far enough into the opening, the actuated arm will lose contact with the side walls of the surface surrounding the opening and will expand to its open position. In its open position, the arm is positioned just behind or against the back face of the surface surrounding the opening, locking the housing into the opening in the surface. The invention further allows for the spring actuated arm to be tightened against or moved away from the back face of the surface by adjusting the positioning of the shaft.

Abstract: An alignment jig that creates a plurality of parallelograms may be used to align an external alignment line with an internal target path. The internal target path is within the patient's body and may be defined by two guide pin tips. The alignment jig may be created so that it creates the external alignment line to be co-linear with the internal target path or the external alignment line may be parallel to the internal target path by offset a distance from being co-linear. The external alignment line may be used in the provision of therapy such as the delivery of a screw to a precise location in the provision of therapy to a portion of the spine.

Abstract: A loudspeaker mounting assembly for mounting a loudspeaker in an isolated relation to a structure includes an enclosure and a plurality of interface elements composed of a vibration-damping material. The enclosure has an interior for receiving the loudspeaker and includes at least two spaced-apart support members. Each of the at least two support members includes a support member outer surface and an inner surface extending from the support member outer surface into the support member. The inner surface defines a support member bore. Each interface element includes an interface element outer surface. Each interface element is disposed in a corresponding one of the support member bores and at least partially extends out from the respective support member outer surface, where each interface element outer surface contacts the respective inner surface of the support member.