Harman International Industries, Inc.

Google Inc.

Motorola Mobility LLC

Bose Corporation

The Penn State Research Foundation

Other

Kevin J Bastyr

Plamen A Ivanov

Joel A Clark

David Trumpy

Robert A Zurek

Adrian M Schuster

Andrew K Wells

Wen Hao Zhang

Jincheng Wu

Tao Feng

Robert M Keolian

James May

Snehitha Singaraju

Prabhu Annabathula

Mark A Jasiuk

Tenkasi Vaideeswaran Ramabadran

Ray Scott Wakeland

Rivanaldo S Oliveira

Divya Sishtla Venkata

Antonio Gomez

Giles T Davis

Michael W Stark

Shiyu Chen

Santosh Lakshmikanth Adari

John Feurman Brady

Hilmar Lehnert

Robert Preston Parker

Riley Winton

Christopher B Ickler

Jacky Chi-Hung Chan

Jeffrey Charles Tackett

Geon-Seok Kim

Brian J Gawronski

Tingli Cai

Jonathan Wesley Christian

Kadagattur Gopinatha Srinidhi

Sattwik Basu

Aditya Kumar

Abdullah Kucuk

Prabhu Anabathula

Seungyoon Lee

John Ross Meloney

Hidehiko Fukushima

John W Wuthrich

Jens Dembinski

Nicolas Pelle

Prashanth Udumula

Dylan M Stafford

David Paul Trumpy

In at least one embodiment, an active noise cancellation (ANC) system is provided. The system includes at least one loudspeaker to project anti-noise sound in response to receiving a first anti-noise signal and at least one microphone to provide an error signal indicative of noise and the anti-noise sound. The system further includes a head tracker sensor to provide a first signal indicative of a position of a user's head and a first controllable filter programmed to modify a transfer function between the microphone and at least one remote microphone location to generate an estimated remote microphone error signal based at least on the error signal and the first signal. The system further includes a second controllable filter programmed to generate the first anti-noise signal to account for the position of the user's head at least based on the estimated remote microphone error signal.

System and method for eliminating noise cancellation artifacts from head movement

An active noise cancellation (ANC) system is provided with at least one loudspeaker to project anti-noise sound within a passenger cabin of a vehicle in response to receiving an anti-noise signal and at least one microphone to provide an error signal indicative of noise and the anti-noise sound within the passenger cabin. An adaptive filter controller is programmed to filter the error signal to obtain a noise reduction ratio, and to adjust a step size and/or leakage parameter based on a comparison of the noise reduction ratio to a noise threshold. A controllable filter generates the anti-noise signal based on the adjusted step size and/or leakage parameter.

Instability detection and adaptive-adjustment for active noise cancellation system

An audio system is provided that includes a loudspeaker, at least one microphone, and at least one controller. The loudspeaker transmits an audio signal into a listening environment defined by at least one wall in a room. The at least one microphone is positioned on the loudspeaker and is configured to capture a reverberated audio signal including a plurality of reverberations and a plurality of peaks. The reverberated audio signal is indicative of the audio signal being reflected from the at least one wall. The at least one controller is programmed to apply a confidence score to the plurality of peaks to obtain a maximum score which is indicative of a maximum peak of the audio signal that is reflected from the at least one wall and determine a distance between the loudspeaker and the wall based at least on the maximum score.

Boundary distance system and method

An active noise cancellation (ANC) system is provided with at least one loudspeaker to project anti-noise sound within a passenger cabin of a vehicle in response to receiving an anti-noise signal. At least one microphone provides an error signal indicative of noise and the anti-noise sound within the passenger cabin. An occupancy controller is programmed to modify a transfer function between the at least one microphone and at least one virtual microphone based on an occupancy signal indicative of occupant presence within the passenger cabin. An adaptive filter controller is programmed to filter the error signal using the transfer function to obtain an estimated virtual microphone error signal. A controllable filter generates the anti-noise signal based on the estimated virtual microphone error signal.

Occupancy based active noise cancellation systems

In at least one embodiment, an active noise cancellation (ANC) system is provided. An audio signal source provides an audio signal. At least one loudspeaker projects anti-noise sound within a cabin. At least one microphone provides a first error signal indicative of the noise, the audio signal, and the anti-noise sound and a second error signal indicative of an estimated anti-noise signal. At least one controller is programmed to receive the first error signal and the second error signal and to provide an estimated impulse response based at least on the first error signal and the second error signal. The at least one controller is further programmed to compare the estimated impulse response to one or more pre-stored impulse responses; and to select a first pre-stored impulse response that matches the estimated impulse response to filter one or more reference signals at an adaptive filter to generate the anti-noise signal.

System and method for secondary path switching for active noise cancellation

A road noise cancellation (RNC) system is provided with at least one loudspeaker to project anti-noise sound within a passenger cabin of a vehicle in response to an anti-noise signal; and a controller. The controller is programmed to: determine a coherence value between a noise signal indicative of road induced noise and an error signal indicative of noise and the anti-noise sound within the passenger cabin; estimate a noise reduction value based on the coherence value; filter the noise signal and the error signal based on the estimated noise reduction value; and generate the anti-noise signal based on the filtered noise signal and the filtered error signal.

Road noise cancellation shaping filters

A heat exchanger with a monocoque structure transfers heat between a first fluid and a second fluid. The heat exchanger has a plurality of tubes through which the first fluid may flow in a direction, each of the plurality of tubes has a first mouth end, an opposing second mouth end and a waist region between the first mouth end and the second mouth end. The heat exchanger also has one or more intercom1ected fluid challllels through which the second fluid may flow. the one or more fluid chamlels lay generally in a plane, the plurality of tubes and the one or more fluid channels interleave such that heat may be transferred between the plurality of tubes and the one or more fluid challllels, and the direction of flow of the first fluid is generally perpendicular to the plane of the one or more fluid chamlels.

Monocoque shell and tube heat exchanger

A vehicle audio system is provided with at least one loudspeaker to project sound within a room in response to receiving an audio signal. A controller is programmed to generate the audio signal based on at least one occupancy signal indicative of occupant presence and identification within the room, wherein the audio signal is indicative of at least one of anti-noise sound, synthesized engine noise (SEN), and music.

Occupant detection and identification based audio system with music, noise cancellation and vehicle sound synthesis

Adjustment of active noise cancellation (ANC) systems can include determining a noise within a vehicle; detecting a movement of a head of a listener; adjusting one or more parameters of the ANC system based at least on the noise and the movement of the head of the listener; determining an anti-noise based at least on the adjusted one or more parameters; and outputting the anti-noise.

Adaptive active noise cancellation based on head movement

An active noise cancellation (ANC) system is provided with at least one loudspeaker to project an anti-noise sound within a room in response to receiving an anti-noise signal. A first controller is programmed to adjust a transfer function indicative of a secondary path between the at least one loudspeaker and at least one microphone within the room based on a resonance frequency of the at least one loudspeaker, and to generate the anti-noise signal based on the adjusted transfer function.

Active noise cancellation system secondary path adjustment

A disclosed method includes monitoring an audio signal energy level while having a noise suppressor deactivated to conserve battery power, buffering the audio signal in response to a detected increase in the audio energy level, activating and running a voice activity detector on the audio signal in response to the detected increase in the audio energy level and activating and running a noise estimator in response to voice being detected in the audio signal by the voice activity detector. The method may further include activating and running the noise suppressor only if the noise estimator determines that noise suppression is required. The method activates and runs a noise type classifier to determine the noise type based on information received from the noise estimator and selects a noise suppressor algorithm, from a group of available noise suppressor algorithms, where the selected noise suppressor algorithm is the most power consumption efficient.

Apparatus and method for power efficient signal conditioning for a voice recognition system

Embodiments are provided for receiving a request to output audio at a first speaker and a second speaker of an electronic device, determining that the electronic device is oriented in a portrait orientation or a landscape orientation, identifying, based on the determined orientation, a first equalization setting for the first speaker and a second equalization setting for the second speaker, providing, for output at the first speaker, a first audio signal with the first equalization setting, and providing, for output at the second speaker, a second audio signal with the second equalization setting.

Systems and methods for equalizing audio for playback on an electronic device

In at least one embodiment, an active noise cancellation (ANC) system is provided. The ANC system includes at least one microphone, a first filter, a first controllable filter, and at least one controller. The at least one microphone provides an error signal indicative of noise and an anti-noise sound within the cabin. The first filter modifies a transfer function between the at least one microphone and at least one remote microphone location to generate an estimated remote microphone error signal based at least on the error signal. The first controllable filter generates the anti-noise signal based on the estimated remote microphone error signal. The controller receives receive a first signal indicative of the vehicle exhibiting a fast-adapting event controls the first filter to execute a predetermined filter based on the first signal to reduce a group delay associated with the first filter.

Fast adapting high frequency remote microphone noise cancellation

A heat exchanger with a monocoque structure transfers heat between a first fluid and a second fluid. The heat exchanger in has a plurality of tubes through which the first fluid may flow in a direction, each of the plurality of tubes has a first mouth end, an N opposing second mouth end and a waist region between the first mouth end and the second mouth end. The heat exchanger also has one or more interconnected fluid channels through which the second fluid may flow, the one or more fluid channels lay generally in a plane, the plurality of tubes and the one or more fluid channels interleave such that heat may be transferred between the plurality of tubes and the one or more fluid channels, and the direction of flow of the first fluid is generally perpendicular to the plane of the one or more fluid channels.

A vehicle sound synthesis system is provided with a controller and a loudspeaker. The controller is programmed to receive an input indicative of at least one of a gear selection, an engine speed, and a pedal position and to generate an audio signal indicative of synthesized engine noise (SEN). The controller is further programmed to attenuate the audio signal at a first rate in response to at least one of the gear selection, the engine speed, and the pedal position indicating first vehicle conditions. The loudspeaker is adapted to project sound within a passenger compartment of a vehicle in response to receiving the attenuated audio signal.

System and method for steady state vehicle sound synthesis

Growing community of inventors

Franklin, MI, United States of America

Kevin J Bastyr