A transparent operation plate is disposed on the operation panel of an input device in correspondence with tone information to be input. A pair of touch contacts are formed exposed on the surface of each transparent operation plate. A liquid crystal display element is disposed immediately below the transparent operation plate. The liquid crystal element displays characters representing the tone in...

The invention relates to a sound damping material in the shape of foils or strips comprising open-pored foam material impregnated with different quantities of a viscoelastic compound, which is intended for application to attenuated structures, particularly automobile body panels.

A digital signal processor uses a RAM for signal processing. This allows the transfer function to be easily changed by either hardwired circuitry or a microprocessor. Two RAMs per channel can be used, one processing the signal, while the other has its transfer function changed. The operations of the RAMs can be changed during a portion of the input signal, e.g. blanking times, when the switch over...

An optical imager includes a sensor and a diffraction lenticular array. The sensor includes a substrate of a semiconductor material having a pair of opposed major surfaces and a plurality of photodetectors arranged in a plurality of columns along one of the major surfaces. The diffraction lenticular array includes a plurality of stripes of a material which will diffract the radiation being sensed....