Apple was postulated a HomePod Patent this week covering Acoustic Change Direction


The U.S. Patent and Trademark Office strictly published an critical postulated obvious for Apple Inc. this week covering their HomePod device invention and privately acoustic change direction.


Patent: (HomePod) Acoustic Change Direction


Apple’s newly postulated obvious covers their invention relating to an audio complement that automatically determines when to electronically adjust a digital audio digest process, that is digest an audio vigilance for acclimatisation into sound by a loudspeaker cabinet, in response to automatically detecting a change in an acoustic sourroundings of a loudspeaker cabinet. The obvious relates to Apple’s HomePod.


An essence of a invention is an audio complement that adjusts how sound is constructed by (by) a loudspeaker cabinet, when there are (or in response to) changes in an acoustic sourroundings in that a loudspeaker cupboard resides. The audio complement includes a loudspeaker cupboard that is configured to furnish sound, a processor, several pairs of microphones, and a non-transitory appurtenance entertaining middle (memory) in that instructions are stored that when executed by a processor automatically perform an acoustic sourroundings change showing process.


Each “pair” of microphones includes a same (or shares a same) inner microphone that is configured to constraint sound inside a orator motorist behind volume of a loudspeaker cabinet, and a opposite outmost microphone that is configured to constraint sound outward a loudspeaker cupboard (but that might still be integrated into a loudspeaker cabinet.)


The non-transitory appurtenance entertaining middle stores instructions that when executed by a processor means a complement to, for any span of microphones, accept (i) a initial microphone vigilance of inner sound prisoner by a inner microphone and (ii) a second microphone vigilance of outmost sound prisoner by a opposite outmost microphone of a pair. The initial and second microphone signals are used to guess a deviation impedance of a loudspeaker cabinet.


A showing metric or deviation impedance metric (also referred to here as a showing value or a deviation impedance metric) is computed, formed on a deviation impedance in a magnitude band. A disproportion between (i) one of a “current” computed showing values compared with a given span of microphones and (ii) a formerly computed showing value compared with a given span of microphones is computed. The routine afterwards adjusts how a audio complement renders an audio vigilance that is to furnish sound by a loudspeaker cabinet, in response to a computed disproportion assembly an acoustic change threshold.


In one embodiment, a acoustic change threshold is comparison formed on a integrity of either a loudspeaker cupboard has been moved. The loudspeaker cupboard can embody (e.g., integrated therein) an sluggishness sensor (e.g., accelerometer, gyroscope, and magnetometer) that detects transformation of a audio cabinet.


Once transformation is detected, a acoustic change threshold might in response be lowered, that creates it some-more expected that a acoustic sourroundings change showing routine will detect a change in a acoustic environment. For instance, if a acoustic change threshold is lowered, afterwards a compulsory disproportion (between a stream computed showing value and a formerly computed showing value) decreases as well, thereby augmenting odds that a audio complement will adjust a rendered audio signal.


This might safeguard that a audio complement performs improved or is improved blending to a presumably altered acoustic sourroundings (e.g., where a loudspeaker cupboard is repositioned within a same room or is altered to a opposite room). The showing of movement, regulating information outlay from a sluggishness sensor, might also be used to bypass a opening of a acoustic sourroundings change showing process. For example, on a integrity that a loudspeaker cupboard has altered over a suit threshold, a audio complement might automatically adjust a rendered audio signal.


2 X HomePod Patent  Granted to apple in Jun 2018

Apple’s obvious FIG. 1 shows an instance cylindrical loudspeaker cupboard that includes a sound outlay transducer and 6 microphones.


Apple’s postulated obvious 9,992,595 was creatively filed in Q2 2017 and published on Jun 5, 2018 by a US Patent and Trademark Office.


Other HomePod patents embody these: one, two and pattern patents in China and the U.S. Also see a Audio Archives for more.


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