Abstract: A three-dimensional control system includes an input device, a computing device, and a tracking assembly. The input device can include an input sensor, an inertial measurement unit sensor, and an ultrasonic speaker. The tracking assembly can include a plurality of ultrasonic microphones and an inertial measurement unit disposed on or with the computing device. The plurality of ultrasonic microphones can include three microphones in a first plane and at least one other ultrasonic microphone disposed out of the first plane. The ultrasonic microphones can be configured to detect ultrasonic waves output by the speaker of the input device and the computing device can triangulate the position of the input device relative to the computing device in space.

Abstract: A computer input system includes a mouse including a housing having an interior surface defining an internal volume and a sensor assembly disposed in the internal volume. A processor is electrically coupled to the sensor assembly and a memory component having electronic instructions stored thereon that, when executed by the processor, causes the processor to determine an orientation of the mouse relative to a hand based on a touch input from the hand detected by the sensor assembly. The mouse can also have a circular array of touch sensors or lights that detect hand position and provide orientation information to the user.

Abstract: An input device can include a housing defining an internal volume and a lower portion, the lower portion defining an aperture, an input sensor disposed in the internal volume, and a haptic assembly disposed in the internal volume. The haptic assembly can include an actuator and a foot coupled to the actuator and aligned with the aperture. The actuator can be configured to selectively extend the foot through the aperture to vary a sliding resistance of the input device on a support surface.

Abstract: A communication device (12) transmits a communication signal during repetitive time slots. The communication device (12) includes a duty-cycle adjustment signal generator (82) that generates an adjustment signal based on a proximity signal. A controller (54) in response to the proximity signal, adjusts a transmission duty cycle relating to the repetitive time slots for transmitting a communication signal during a time slot. The communication signal is then radiated via an antenna (70).

Abstract: A communication device (12) transmits a communication signal during repetitive time slots. The communication device (12) includes a duty-cycle adjustment signal generator (82) that generates an adjustment signal based on a proximity signal. A controller (54) in response to the proximity signal, adjusts a transmission duty cycle relating to the repetitive time slots for transmitting a communication signal during a time slot. The communication signal is then radiated via an antenna (70).

Abstract: A selective call receiver (100) uses a method of partial address correlation to decode a portion of a selective call signal transmitted by a radio communication system so as to reduce energy consumption of the selective call receiver (100). The selective call receiver (100) is programmed to receive the portion of the selective call signal from the radio communication system, determine a first probable energy E.sub.1 that would be dissipated by the selective call receiver if it were to use partial address correlation, and compare the first probable energy E.sub.1 to a second probable energy E.sub.2 that would be dissipated by the selective call receiver if it did not use partial address correlation. If E.sub.1 is less than E.sub.2, then partial address correlation is used.

Abstract: An electronic device having operational parameters comprises a receiver (11) for receiving a signal and a microprocessor (12) for monitoring (21) the status of the operational parameters. An output device (15) presents (31) a voice message when the status of one of the operational parameters exceeds a threshold.