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225 results about "Audio feedback" patented technology

Audio feedback (also known as acoustic feedback, simply as feedback, or the Larsen effect) is a special kind of positive loop gain which occurs when a sound loop exists between an audio input (for example, a microphone or guitar pickup) and an audio output (for example, a power amplified loudspeaker). In this example, a signal received by the microphone is amplified and passed out of the loudspeaker. The sound from the loudspeaker can then be received by the microphone again, amplified further, and then passed out through the loudspeaker again. The frequency of the resulting sound is determined by resonance frequencies in the microphone, amplifier, and loudspeaker, the acoustics of the room, the directional pick-up and emission patterns of the microphone and loudspeaker, and the distance between them. For small PA systems the sound is readily recognized as a loud squeal or screech. The principles of audio feedback were first discovered by Danish scientist Søren Absalon Larsen, hence the name "Larsen Effect".

Apparatus for determining multi-bit data via light received by a light receiver and coupled to spectral sensors that measure light in spectral bands

Optical characteristic measuring systems and methods such as for determining the color or other optical characteristics of teeth are disclosed. Perimeter receiver fiber optics preferably are spaced apart from a source fiber optic and receive light from the surface of the object/tooth being measured. Light from the perimeter fiber optics pass to a variety of filters. The system utilizes the perimeter receiver fiber optics to determine information regarding the height and angle of the probe with respect to the object/tooth being measured. Under processor control, the optical characteristics measurement may be made at a predetermined height and angle. Various color spectral photometer arrangements are disclosed. Translucency, fluorescence, gloss and/or surface texture data also may be obtained. Audio feedback may be provided to guide operator use of the system. The probe may have a removable or shielded tip for contamination prevention. A method of producing dental prostheses based on measured data also is disclosed. Measured data also may be stored and/or organized as part of a patient data base. Such methods and implements may be desirably utilized for purposes of detecting and preventing counterfeiting or the like. Low cost and small form factor spectrometers, and methods for manufacturing the same, also are disclosed. Spectrometers and spectrophotometers embedded in printing and scanning and other type devices, as well as computer companion devices, scope-type devices and the like, also are disclosed. Data encoding based on such devices also may be implemented.
Owner:RPX CORP

Apparatus and method for measuring optical characteristics of an object

InactiveUS20060023218A1Minimizing heightMinimizing problemsSurgeryScattering properties measurementsFiberFluorescence
Optical characteristic measuring systems and methods such as for determining the color or other optical characteristics of teeth are disclosed. Perimeter receiver fiber optics preferably are spaced apart from a source fiber optic and receive light from the surface of the object / tooth being measured. Light from the perimeter fiber optics pass to a variety of filters. The system utilizes the perimeter receiver fiber optics to determine information regarding the height and angle of the probe with respect to the object / tooth being measured. Under processor control, the optical characteristics measurement may be made at a predetermined height and angle. Various color spectral photometer arrangements are disclosed. Translucency, fluorescence, gloss and / or surface texture data also may be obtained. Audio feedback may be provided to guide operator use of the system. The probe may have a removable or shielded tip for contamination prevention. A method of producing dental prostheses based on measured data also is disclosed. Measured data also may be stored and / or organized as part of a patient data base. Such methods and implements may be desirably utilized for purposes of detecting and preventing counterfeiting or the like. Low cost and small form factor spectrometers, and methods for manufacturing the same, also are disclosed. Spectrometers and spectrophotometers embedded in printing and scanning and other type devices, as well as computer companion devices, scope-type devices and the like, also are disclosed. Data encoding based on such devices also may be implemented.
Owner:RPX CORP +1

Remote wellness monitoring system with unversally accessible interface

This embodiment of the invention consists of an apparatus or home appliance unit embodied in a hardware entity running an embedded software program connected to a server computer via a phone line or high-speed internet. At home, the apparatus communicates with an optional set of medical health monitoring devices such as but not limited to, blood pressure monitors, blood glucose meters, and pulse oximeters using wired or wireless communications methods in order to perform wellness measurement. The illustrated embodiments of the invention provide a novel user interface on the home appliance to make the system accessible to people with disabilities. The simple user interface is designed to be accessible to people who are blind or deaf or people who cannot use their hands and require an alternative interface device such as a sip & puff controller. For the hearing impaired, the interface duplicates all speech and informational sounds with text or graphic cues. For the Blind, a Rotary knob provides tactile and audio feedback as the user navigates the system options. As every clockwise or counter-clockwise rotation of the knob brings a new option into focus, the user feels the click of the knob, and hears several audio cues including an audible click, a unique musical chime and a spoken description of the selectable option. For people who cannot use their hands to rotate the knob, alternative input controller devices, (such as a sip & puff controller) are supported through wired (such as but not limited to USB) or wireless (such as but not limited to Bluetooth, Zigbee IEEE 802.15.4, Z-Wave, Wi-Fi) connections. The home unit can further monitor wellness activity of the care recipient by pegging the number of times the care recipient passes by a infra-red motion sensor. The filtering of the latter information and subsequent integration over time and comparison with historical counts per unit of time within a 24 hour period can determine the normal activity pattern for the care recipient over the previous 24 hours.
Owner:FARHAN FARIBORZ M +1
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