Sonos, Inc.

Bose Corporation

Other

Hilmar Lehnert

Aurelio Rafael Ramos

Mike Chamness

Timothy W Sheen

Mieko Kusano

Simon Jarvis

Dana Krieger

Roland Bird

Niels Van Hoof

Stefan Reichert

Roger Swales

Keith Dana Martin

Tadeo T Toulis

Richard E Saffran

Lukasz Natkaniec

Finn A Arnold

Wilfred Wei

William M Rabinowitz

Abhijit Kulkarni

Wei Hean Liew

Dayn Wilberding

Paul MacLean

Neil W Griffiths

Luis Vega

Wai-Loong Lim

Chris Davies

William Berardi

Bob Dizon

Koh Eng Giap

Ong Kok Aun

Jonathon Reilly

Guy A Torio

Michael W Stark

Benjamin M Rappoport

Robert Preston Parker

Michael Scott Dublin

Christopher B Ickler

Peter C Santoro

J Richard Aylward

Kenneth Dylan Jacob

Clifford A Henricksen

Brian J Gawronski

Roberto Maria Dizon

Richard Jackson

Andrea Testa

Nash Reilly

Kevin J Bastyr

Wade P Torres

Klaus Hartung

Nicholas D'Amato

Nick D'Amato

Joseph Jankovsky

Pelham Norville

Morten Jorgensen

Jacky Chi-Hung Chan

Eric S Johanson

Joseph B Gaalaas

Joseph John Kutil, Iii

Paul F Fidlin

Michael G Zartarian

William Becker

Daniel M Morton

Frank Croghan

Multichannel audio playback devices and associated systems and methods are disclosed herein. In some examples, a first playback device is configured to receive a source stream of audio content comprising left, right and center input channels. In a first mode, the first playback device is configured to play back audio via a plurality of transducers based on the left, right, and center input channels. In a second mode, in which the first playback device is bonded to second and third playback devices, the first playback device is configured to (i) play back audio via the plurality of transducers based on at least the center input channel, (ii) cause audio to be played via the second playback device based on at least the right input channel, and (iii) cause audio to be played via the third playback device based on at least the left input channel.

Multichannel playback devices and associated systems and methods

A multi-channel and multi-zone audio environment is provided. Various inventions are disclosed that allow playback devices on one or more networks to provide an effective multi-channel and a multi-zone audio environment using timing information. According to one example, timing information is used to coordinate playback devices connected over a low-latency network to provide audio along with a video display. In another example, timing information is used to coordinate playback devices connected over a mesh network to provide audio in one or more zones or zone groups.

Providing a multi-channel and a multi-zone audio environment

Examples described herein relate to a charging system for wireless earbuds involving charging adapters that are attachable to the wireless earbuds. In some implementations, the charging adapter is attachable to an external surface of an earbud using a magnetic or mechanical interface that align electrodes of the charging adapter with electrodes on the wireless headset, allowing an internal battery of the earbud to draw current and charge from the charging adapter while the earbud is in-ear. Then, when the internal battery is and recharged using a charging case or wall charger, the charging adapter can be detached from the earbud.

Wireless earbud charging

Example techniques relate to audio generation in a media playback system. Based on one or more first functions and first characteristics of an area, the system may generate first audio that includes a first audio signal and a second audio signal. The system provides the first audio signal to at least one first audio driver and the second audio signal to at least one second audio driver, thereby causing a first playback device and a second playback device to play back the first audio synchronously. The system receives second characteristics of the area and based on one or more second functions and the second characteristics, generates second audio comprising a third audio signal and a fourth audio signal. The system provides the third audio signal to the at least one first audio driver and the fourth audio signal to the at least one second audio driver.

Audio generation in a media playback system

To avoid damage from overheating, playback device operation can be modulated based on input from temperature sensors. An example method includes obtaining, via one or more temperature sensors carried by the playback device, temperature data. Based on the temperature data, a first temperature parameter is detected. In response to detecting the first temperature parameter, a gain of audio playback is decreased by a first amount. After decreasing the gain of audio playback by the first amount, a second temperature parameter is detected. In response to detecting the second temperature parameter, the gain of audio playback is decreased by a second amount different than the first amount.

Thermal control of audio playback devices

Systems and methods for providing augmented arrays for audio playback are disclosed. An example playback device includes a first transducer configured to output audio along a first acoustic axis and a second transducer configured to output audio along a second acoustic axis. The playback device is configured to receive a source stream of audio content including at least a first input channel and a second input channel. The device plays back first audio output via the first transducer based on the first input channel and directed along the first acoustic axis, and plays back second audio output via the second transducer based on the second input channel and directed along the second acoustic axis, wherein the second audio output at least partially cancels the first audio output along a first spatial region offset from the first acoustic axis.

Array augmentation for audio playback devices

Playback device

Systems and methods for adjusting bass levels of a multi-channel audio signal include, among other features, (i) receiving the multi-channel signal via a playback device; (ii) separating, from the multi-channel signal, low-frequency signals comprising frequencies less than a threshold frequency; (iii) determining electrical energies of the low-frequency signals; (iv) determining a first energy by summing the electrical energies of the low-frequency signals; (v) consolidating the low-frequency signals into a consolidated low-frequency signal; (vi) determining a second energy by determining an electrical energy of the consolidated low-frequency signal; (vii) generating a gain-adjusted low-frequency signal by adjusting a gain of the consolidated low-frequency signal based on both (a) the first energy and (b) the second energy; (viii) generating a gain-adjusted multi-channel signal by mixing the gain-adjusted low-frequency signal back into the multi-channel signal; and (ix) using the gain-adjusted multi-channel signal to play back gain-adjusted multi-channel audio content via the playback device.

Systems and methods of adjusting bass levels of multi-channel audio signals

Embodiments disclosed herein include a headphone device which operates in various modes applying different gesture profiles based on various operational, playback, or environmental conditions. An example headphone device includes a first earbud and a second earbud communicatively coupled to each other. One or both of the earbuds include a touch-sensitive interface and a processor. The earbuds are configured to interpret a first set of gestures to the touch-sensitive interface as respective commands while operating in a first mode. Upon detecting a change in an operational condition, one or both earbuds transition to a second mode where the earbuds are configured to interpret a second set of gestures to the touch-sensitive interface as respective commands, different from the respective commands correlating to the first set of gestures to the touch-sensitive interface.

Dynamic earbud profile

Media player

Systems and methods for authenticating a passive speaker include (i) activating, by a playback device configured to drive the passive speaker, a passive speaker identification circuit of the passive speaker by providing an identification signal to an input terminal of the passive speaker, wherein the passive speaker is a particular type of passive speaker having particular acoustic characteristics; (ii) while the passive speaker identification circuit is active, measuring, by the playback device, an electrical current of the identification signal; (iii) determining, based on the measured electrical current of the identification signal, an impedance modulation of the passive speaker; (iv) determining, by the playback device, the particular type of the passive speaker based on the impedance modulation of the passive speaker; and (v) applying, by the playback device, a calibration to the playback device based on the determined particular type of the passive speaker.

Passive speaker authentication

In some embodiments, a method comprises receiving audio content comprising left input channel signals and right input channel signals, and generating first and second input signals from the left and right input channel signals. The first input signal is based on a sum of the left and right input channel signals, and the second input signal is based on a difference of the left and right input channel signals. An array transfer function is applied to the first and second input signals to produced audio output signals, which can be provided to a plurality of audio transducers on one or more playback devices.

Sum-difference arrays for audio playback devices

Growing community of inventors

Framingham, MA, United States of America

Hilmar Lehnert