University of Rochester

Robert Boschgmbh

Robert Bosch Security Systems, Inc.

David Allan Anderson

Mark Frederick Bocko

Michael Charles Heilemann

Jeffrey M Swan

William DiPoala

Dennis M Caler

Mark F Bocko

Systems and methods of driving plate loudspeakers with different parameters based on frequency region in a way similar to typical cone driver crossover networks are described. These systems and methods may be implemented using arrays of independently controlled drivers which allow a designer to emphasize or de-emphasize certain modes in certain frequency bands. Tuning the characteristics of the plate's motion can also affect the acoustical properties in a larger space rather than just at a single location. The systems and methods described herein can grant a designer a degree of control over the characteristics and performance of the plate.

Systems and methods for controlling plate loudspeakers using modal crossover networks

A method, system and devices to selectively control modal vibrations in an elastic panel with a number of force actuators distributed throughout the surface of the elastic panel to excite/depress the response of one or more vibrational resonant modes included in a prescribed subset. The force actuators are disposed such that prescribed modal excitation/depression may be realized when the actuators are driven by a common source signal.

Method, system and devices for selective modal control for vibrating structures

A loudspeaker system with viscoelastic material affixed between two flexible panels is disclosed. The loudspeaker system dissipates the energy of motion, resulting in less pronounced resonant peaks. The effect may be especially evident at high frequencies, where energy is dissipated over many cycles in a shorter period of time. Also disclosed are the method of making the loudspeaker system and a method of using the loudspeaker system.

Panel loudspeakers constructed of panels with viscoelastic damping material

A security system and method of operation thereof stores information related to a plurality of detected events and determines an activity pattern based on the stored information. The system and method then determines a type of alarm, if any, to issue in response to a detected trigger event based at least in part on the determined activity pattern.

Security system with activity pattern recognition

A security sensor apparatus senses movement of an object. The sensor apparatus includes an electronics arrangement having an optical emitter and an optical receiver. The optical receiver has an axis of reception. The optical emitter emits a first beam along an axis of emission in an emission direction. The axis of emission diverges in the emission direction from the axis of reception at an angle of at least two degrees. The electronics arrangement is mounted in association a first surface of the object or a second surface of a structure disposed in opposition to the first surface. A reflector arrangement includes at least one reflective surface and is mounted in association with the other of the first surface and the second surface. The at least one reflective surface receives at least a portion of the first beam and produces a second beam directed at and received by the optical receiver.

Offset optical security sensor for a door

A security assembly includes a first building structure at least partially defining a building opening. The first building structure has a first surface. A movable building structure is movable between a closed position in which the movable building structure covers the opening and an open position in which the movable building structure uncovers the opening. The movable building structure has a perimeter with a second surface disposed in opposition to the first surface when the movable building structure is in the closed position. An optical sensor apparatus includes an electronics module mounted in association with the first surface or the second surface. The electronics module has an optical emitter and an optical receiver. The optical emitter emits a first beam. A reflector arrangement is mounted in association with the other of the first surface and the second surface. The reflector arrangement provides a plurality of sequential reflections of the first beam to thereby produce a second beam directed at the optical receiver.

Growing community of inventors

Rochester, NY, United States of America

David Allan Anderson