Abstract: Systems and methods for actuating optical elements steer a beam in two degrees of freedom in order to efficiently align the beam between a selected input and output. These systems include actuator configurations that have piezoelectric and electromagnetic components, servo control systems, and optical cross connect configurations. The actuable optical elements include reflective surfaces (e.g., mirrors), prisms, lenses, and optical fibers.

Abstract: A system for enhancing sound signals at a relatively high sonic level power input and a comparatively low signal power level output which are relatively adjusted so that the signal is enhanced when reproduced. The input includes a capacitor for creating a reverberation effect in the signal and an adjustable power level varying device for causing a second harmonic effect in the signal. When the system is used in a multichannel sound system, a low pass filter is connected between channels for causing a phantom center channel effect in the sound signal.