Harman International Industries, Inc.

University of Utah Research Foundation

Jeffrey L Hutchings

Richard Allen Kreifeldt

James M Kirsch

Ajay Sundaram Iyer

Aaron Gelter

Russell H Lambert

Robert Boatright

Josh Hunsaker

Craig Gunther

V John Mathews

Brian R Parker

Shreyas Srikanth Payal

Russell Lambert

One or more embodiments set forth an audio processing system for a personal listening device that includes a set of microphones, a noise reduction module, an audio ducker, and a mixer. The set of microphones is configured to receive a first set of audio signals from an environment. The noise reduction module is configured to detect when a signal of interest is present in the first plurality of audio signals, and, upon detecting a signal of interest, transmit a ducking control signal. The audio ducker is configured to receive the ducking control signal, and receive a second plurality of audio signals via a playback device. The audio ducker is further configured to reduce an amplitude of a second plurality of audio signals relative to the signal of interest based on the ducking control signal. The mixer combines the first plurality of audio signals and second plurality of audio signals.

Sports headphone with situational awareness

In an audio system, an audio signal is preprocessed to provide an input signal to a fast detector and a slow detector, the input signal comprising alert signals and ambient sounds. The slow detector determines the ambient sound level of the input signal which is output to an alert signal detector. The alert signal detector uses the ambient sound level to compute an adaptive threshold level using an adaptive threshold function. The fast detector determines the envelope level of the input signal which is output to the alert signal detector. The alert signal detector compares the envelope level to the adaptive threshold level to determine if an alert signal is present in the input signal. The adaptive threshold level varies depending on the ambient sound level of the input signal and the alert signal detection of the audio system automatically adapts to changing acoustic environments having different ambient sound levels.

Approach for detecting alert signals in changing environments

Digital filters for processing an input audio signal for extending the audio capabilities and reducing distortion of a loudspeaker. Such extension may include a general sound pressure level (SPL) extension or a more targeted low frequency (LF) extension. This may be accomplished by modifying an original frequency response of the loudspeaker to achieve a particular extension, and applying a digital linear filter based on the modified frequency response to the audio signal. A nonlinear digital filter may also be applied to the audio signal reduce nonlinear distortions of the loudspeaker. The nonlinear digital filter may be based on an inverse of an electro-mechanical model of the loudspeaker. In this manner, a loudspeaker may be driven close to its maximum theoretical power capability without increasing distortion in the loudspeaker output.

Digital signal processor for audio extensions and correction of nonlinear distortions in loudspeakers

In one embodiment, a computer-program product embodied in a non-transitory computer readable medium that is programmed for performing an automatic speaker setup is provided. The computer-program product includes instructions for wirelessly receiving, via Near Field Communication (NFC), speaker information for at least one speaker in a speaker system. The computer-program product further includes instructions wirelessly transmitting the speaker information to an audio control unit that transmits audio data to the at least one speaker based on the speaker information.

Automatic speaker setup

A corrector is configured to transform audio signals to compensate for unwanted distortion characteristics of a loudspeaker. A tuning filter is configured to transform audio signals to incorporate desired distortion characteristics associated with a target loudspeaker. By chaining together the tuning filter and the corrector, an audio signal can be modified so that the loudspeaker, when outputting the audio signal, has response characteristics of the target loudspeaker.

Techniques for tuning the distortion response of a loudspeaker

An apparatus for mobile device localization is provided with a primary device. The primary device is configured to transmit a first signal at a first transmission power level to a secondary device and to receive a response signal that is indicative of a quality indicator of the first signal as received by the secondary device. The primary device is further configured to determine a second transmission power level based on the quality indicator; transmit a second signal at the second transmission power level to the secondary device; and to determine a distance between the primary device and the secondary device based on a filtered transmission power level value.

Apparatus and method for localization of a mobile wireless device using radio signal parameters

A system for mobile device localization is provided with a primary device. The primary device is configured to transmit a first signal at a first transmission power level to a secondary device and to receive a response signal that is indicative of a signal strength indicator of the first signal as received by the secondary device. The primary device is further configured to determine a second transmission power level based on the signal strength indicator; transmit a second signal at the second transmission power level to the secondary device; and to determine a distance between the primary device and the secondary device based on a filtered transmission power level value.

Localization of a mobile device using radio signal parameters

In at least one embodiment, an apparatus for automatic device selection and for media content playback is provided. The apparatus includes a first media device positioned in a first media zone and being wirelessly coupled to a second media device that is positioned in a second media zone and a mobile device that transmits media content. The first media device is configured to receive a first signal from the second media device to determine a first distance of the second media device from the first media device and to receive a second signal from the mobile device to determine a second distance of the mobile device from the first media device. The first media device is further configured to playback the media content from the mobile device in the first media zone if the second distance is less than the first distance.

Apparatus and method for automatic device selection for wireless media devices

Various embodiments relate to creating and utilizing a vehicle surveillance network to monitor objects and/or events. Messages may be broadcasted from at least one communication system of a surveillance network which is communicating with one or more vehicles of the surveillance network and received in a vehicle. Instructions may be transmitted to at least one vehicle camera to capture one or more images of objects or events outside of the vehicle in response to receiving the at least one broadcasted message. At least one vehicle camera in each of the vehicles of the surveillance network may capture the images of the object and/or events. Further instructions may include transmitting the captured images from the one or more vehicles to one or more event responders.

Mobile autonomous surveillance

An electronic hearing protector includes an ear cup assembly comprising a front exterior microphone that provides a front microphone signal and a rear exterior microphone that provides a rear microphone signal. A processor receives and digitizes the front microphone signal and the rear microphone signal, and provides a front channel signal and a rear channel signal indicative thereof respectively. A filter receives the rear channel signal and has a cut-off frequency value that provides a high-frequency roll-off and a notch at a notch filter frequency value that is less than the cut-off frequency value, where the filter provides a filtered signal. A first signal indicative of the front channel signal and a second signal indicative of the filtered signal are summed, and a signal indicative of the summed signal is provided to a speaker within the ear cup that provides an audio signal within the first ear cup indicative of the summed signal.

Electronic hearing protector with quadrant sound localization

A network media adapter includes peripheral interfaces for connection to connectors of audio/video ('A/V') sources and sinks to respectively receive media data from the A/V sources and to transmit media data to the A/V sinks. Components are configured to syntonize or synchronize local media clocks of the A/V sources and sinks to ensure media data integrity affiliated with a protocol of a media network over which the media data is transported. A quality of service (QoS)-compliant media interface is integrated in the network media adapter through which to send and receive processed A/V media data to and from the media network according to the protocol. Other components may be configured to process, encapsulate, and transport over the media network the media data received from the A/V sources. Still other components may be configured to receive media data from the media network and decapsulate, process, and transmit the media data through one or more peripheral interfaces connected to the A/V sinks.

Network media adapter

A system may be provided for synchronizing a first media stream with a second media stream. A first receiver in the system may receive the first media stream over a network. A second receiver in the system may receive the second media stream over the network. The second receiver may determine an identity of a content delay matching stream that indicates the amount of processing delay introduced in the first media stream by a processing component of the first receiver or transmitter. The second receiver may subscribe to the identified content delay matching stream. The second receiver may receive the content delay matching stream over the network and determine the processing delay from the content delay matching stream. The receiver may cause the second media stream to be delayed in accordance with the processing delay in the first media stream such that the first and second media streams are synchronized.

Growing community of inventors

Lehi, UT, United States of America

Jeffrey L Hutchings