Apple invention appears to detail HomePod's adaptive acoustics

 The U.S. Patent and Trademark Office on Thursday published an Apple patent patent ( or ) is a set of exclusive rights granted by a sovereign state to an inventor or assignee for a limited period of time in exchange for detailed public disclosure of an invention application may refer to seemingly related to the company’s upcoming HomePod speaker. In particular, the invention covers a method of equalizing and optimizing loudspeaker output through the use of microphones, digital signal processing and advanced computational algorithms.

Source: USPTO

In its patent application for a “Loudspeaker equalizer,” Apple notes the positioning of a loudspeaker in a given room room is any distinguishable space within a structure can have great effect on sound reproduction. For example, a speaker placed in the corner of a room might may refer to: might, one of the English modal verbs “Might”, a song by Modest Mouse from their 1996 album This Is a Long Drive for Someone with Nothing to Think About Might magazine, a magazine increase radiated acoustic power at low frequencies, causing bass-heavy sound physics, sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a transmission medium such as air or water.

Similarly, the position of a user respective to the speaker might negatively impact perceived frequency response.

To compensate for distortion and other effects, audio equipment manufacturers have long employed digital equalization techniques that optimize audio output.

For example may refer to: exempli gratia (e.g.), usually read out in English as “for example” .example, reserved as a domain name that may not be installed as a top-level domain of the Internet example.com,, the setup procedures of products like surround sound home entertainment systems utilize remote microphones microphone, colloquially nicknamed mic or mike (), is a transducer that converts sound into an electrical signal to measure acoustic power radiated into a room from a variety of positions. Other systems incorporate internal microphones to monitor sound output and infer a global response, or the total acoustic power radiated into a room.

Microphone data is fed to internal may refer to: Internality as a concept in behavioural economics Neijia, internal styles of Chinese martial arts Neigong or “internal skills”, a type of exercise in meditation associated with Daoism circuitry like a processor and DSP, which filters or otherwise equalizes audio signals signal as referred to in communication systems, signal processing, and electrical engineering is a function that “conveys information about the behavior or attributes of some phenomenon” sent to the speaker drivers.

Apple’s solution builds on prior global equalization solutions by employing multiple microphones located both inside and outside of a sealed speaker enclosure was the legal process in England during the 18th century of enclosing a number of small landholdings to create one larger farm. In some embodiments or embodiment may refer to: in psychology, linguistics and philosophy, Embodied cognition (or the embodied mind thesis), a position in cognitive science and the philosophy of mind emphasizing the, an internal microphone is positioned within the back volume of a speaker enclosure, or the cavity beneath a low frequency driver. A second microphone, or multiple microphones, located outside the speaker enclosure measure acoustic pressure in the vicinity of the driver may refer to.

Using onboard processing, the proposed system determines an equalization filter based on radiation impedance is the complex-valued generalization of resistance, a calculation derived from internal pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed levels, speaker displacement, external pressure and other measurement data provided by the microphone array. This filter filtering or filters may refer to is subsequently sent to the DSP for audio signal implementation.

Apple apple tree (Malus pumila, commonly and erroneously called Malus domestica) is a deciduous tree in the rose family best known for its sweet, pomaceous fruit, the apple is promising similar acoustic technology from its HomePod device.

By comparing readings from internal and external microphones, Apple’s loudspeaker system system is a regularly interacting or interdependent group of items forming a unified whole is capable of dynamically responding to its environment. More importantly, radiation physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium impedance can be calculated in real time across a range of frequencies, allowing for constant sound optimization without prior calibration.

Other embodiments include two or more speakers may refer to: Public speaker, one who gives a speech or lecture Speaker (politics), the presiding officer in a legislative assembly HMS Speaker (D90), a World War II Royal Navy aircraft carrier that work together to monitor sound output. For example, the system can be made more efficient by allotting more power to loudspeakers which exhibit higher radiation resistance at certain frequencies.

Alternatively, the system might apply adaptive equalization may refer to filters such that the two or more speakers contribute the same acoustic may refer to power. This latter embodiment is preferable when a single speaker overpowers a second or third speaker because its radiation impedance is higher at specific frequencies is the number of occurrences of a repeating event per unit time.

Whether Apple intends to use today’s invention in its upcoming HomePod speaker is unknown, though the company described similar technology in announcing the device device is usually a constructed tool last month.

Specifically, HomePod’s A8 processor and at least six external may refer to: External (mathematics), a concept in abstract algebra Externality, in economics, the cost or benefit that affects a party who did not choose to incur that cost or benefit Externals, a microphones power may refer to acoustic modeling, audio beam-forming and multi-channel echo cancellation features for seven beam-forming tweeters and a central four-inch woofer. The device can automatically detect its surroundings and tailor audio most commonly refers to sound output may refer to: Output (computing) Gross output in economics, the value of net output or GDP plus intermediate consumption Net output in economics, the gross revenue from production less the value of to match, Apple says. Further, when two HomePods HomePod is a smart speaker created by Apple Inc., similar to the Amazon Echo and Google Home are combined they automatically work together to provide room-filling sound.

Apple’s loudspeaker loudspeaker (or loud-speaker or speaker) is an electroacoustic transducer; which converts an electrical audio signal into a corresponding sound equalizer patent application was first filed for in January 2016 and credits Sylvain J. Choisel, Martin E. Johnson and Jack Y. Dagdagan as its inventors.</span>

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Source: http://appleinsider.com/news/

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