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公开(公告)号：US20180367917A1
公开(公告)日：2018-12-20
申请号：US15622617
申请日：2017-06-14
Applicant: Apple Inc.
Inventor： Sylvain J. Choisel , Simon K. Porter , David A. Sumberg
CPC classification number: H04R9/06 , H03G3/3005 , H04R3/00 , H04R9/025 , H04R9/046 , H04R29/001 , H04R2201/028
Abstract: A coil assembly is coupled to a diaphragm. The coil assembly has a number of coils that are fixed in a stacked, end to end manner along a length axis. The coils include a middle coil, a several upper coils and several lower coils. Each coil has a respective pair of coil terminals so that it can be independently driven by an audio signal. The coil assembly as a whole is overhung, while each of constituent coils is underhung so that there are at least two adjacent coils that are completely within the magnetic gap, and at least two other coils that are completely outside the magnetic gap, during a majority of the full excursion of the coil assembly. Other embodiments are also described and claimed.
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公开(公告)号：US10469044B1
公开(公告)日：2019-11-05
申请号：US15850921
申请日：2017-12-21
Applicant: Apple Inc.
Inventor： James M. Hollabaugh , Hannes Breitschaedel , David A. Sumberg
Abstract: A power mitigation algorithm in a loudspeaker amplification system that includes a loudspeaker driver, an audio amplifier, and a constant output power, power supply. A power requirement for the amplifier to output an audio signal is determined. A gain adjustment signal is then determined based on a difference between the power requirement and a power budget of the amplifier. Gain of the audio signal is adjusted according to the gain adjustment signal, for output through the loudspeaker driver. As a result, a peak level of the power consumption of the amplifier while outputting the gain-adjusted audio signal becomes less than the power budget. Other embodiments are also described and claimed.
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公开(公告)号：US12283265B1
公开(公告)日：2025-04-22
申请号：US17709339
申请日：2022-03-30
Applicant: Apple Inc.
Inventor： David A. Sumberg
Abstract: A method that includes determining a set of one or more reverberation parameters of an extended reality (XR) environment in which a user is to participate, determining whether an audio source device is wirelessly communicatively coupled to send audio to an audio output device, in response to determining that the audio source device is not wirelessly communicatively coupled to the audio output device obtaining a microphone signal produced by a microphone of the audio source device, producing a reverberant audio signal from the microphone signal according to the set of one or more reverberation parameters, and sending the reverberant audio signal to drive a speaker driver of the audio source device.
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公开(公告)号：US10194249B2
公开(公告)日：2019-01-29
申请号：US15622617
申请日：2017-06-14
Applicant: Apple Inc.
Inventor： Sylvain J. Choisel , Simon K. Porter , David A. Sumberg
Abstract: A coil assembly is coupled to a diaphragm. The coil assembly has a number of coils that are fixed in a stacked, end to end manner along a length axis. The coils include a middle coil, a several upper coils and several lower coils. Each coil has a respective pair of coil terminals so that it can be independently driven by an audio signal. The coil assembly as a whole is overhung, while each of constituent coils is underhung so that there are at least two adjacent coils that are completely within the magnetic gap, and at least two other coils that are completely outside the magnetic gap, during a majority of the full excursion of the coil assembly. Other embodiments are also described and claimed.
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