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91.发明授权公开(公告)号：US09942676B1
公开(公告)日：2018-04-10
申请号：US14820354
申请日：2015-08-06
Applicant: Apple Inc.
Inventor： Thomas M. Jensen , David T. Yeh
IPC: H04R29/00
CPC classification number: H04R29/001 , H04R3/007 , H04R29/003
Abstract: Method of throttling a pilot tone for thermal monitoring of an electro-mechanical actuator starts by computing a power estimate based on a driving signal. A first temperature estimate is then computed based on the power estimate. The pilot tone may be generated by adjusting a level of the pilot tone based on at least one of the power estimate or the first temperature estimate. The pilot tone is injected into the driving signal to generate a driving output signal that is outputted by an electro-mechanical actuator. Other embodiments are also described.
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公开(公告)号：US20180084681A1
公开(公告)日：2018-03-22
申请号：US15273613
申请日：2016-09-22
Applicant: Apple Inc.
Inventor： Jian Guo , Sean M. Gordoni
IPC: H05K9/00 , H01L43/02 , H01L27/22 , H05K1/02 , H05K1/18 , H05K1/11 , H01F7/06 , H04R29/00 , G01R33/00
CPC classification number: H05K9/0071 , G01R33/0017 , H01F7/064 , H01L27/22 , H01L43/02 , H04R29/003 , H05K1/0216 , H05K1/115 , H05K1/181 , H05K2201/1003 , H05K2201/10151
Abstract: A compensation coil placed at least partially underneath a magnetic field sensor package in an electronic system provides attenuation of electromagnetic interference (EMI). In an embodiment, the compensation coil attenuates EMI in a frequency band which overlaps with an operating frequency band of the magnetic field sensor. This allows the magnetic field sensor to make accurate magnetic field measurements in the presence of system level alternating current (AC) EMI. In an embodiment, a system comprises: a magnetic field sensor; a compensation coil placed at least partially underneath the magnetic field sensor; and a reverse current generator coupled to the compensation coil and to a power supply that is coupled to an electromagnetic interference (EMI) source, the reverse current generator operable to generate a reverse current in the compensation coil to generate a counter magnetic field for compensating the EMI.
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公开(公告)号：US09924287B2
公开(公告)日：2018-03-20
申请号：US15209852
申请日：2016-07-14
Applicant: NXP B.V.
Inventor： Christophe Macours , Jan Paulus Freerk Huijser , Shawn Scarlett
CPC classification number: H04R29/003 , G01K7/16 , G01K7/427 , G01K2217/00 , H03F1/30 , H03F3/181 , H03F2200/468 , H04R3/007 , H04R9/022 , H04R29/001 , H04R2201/028 , H04R2499/11
Abstract: A circuit and method for determining an ambient temperature for an electronic device having a loudspeaker are described. An amplifier drives the loudspeaker and first circuitry is configure to determine an overall temperature of the loudspeaker or the amplifier. Second circuitry is configured to determine a change in temperature of the loudspeaker or the amplifier resulting from power dissipated in the loudspeaker or the amplifier. Third circuitry is configured to subtract a signal representative of the change in temperature from a signal representative of the overall temperature and output a signal representative of the ambient temperature for the electronic device.
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公开(公告)号：US20180061073A1
公开(公告)日：2018-03-01
申请号：US15248921
申请日：2016-08-26
Applicant: Sonos, Inc.
Inventor： Richard Warren Little
CPC classification number: G06K9/4671 , G06T7/0006 , G06T7/001 , G06T2207/10056 , H04R9/043 , H04R29/003
Abstract: A digital image of a speaker spider may be received from an optical microscope or laser microscope. The digital image is filtered to fill in voids in the digital image, where the voids are indicative of holes in the speaker spider. The filtered digital image is compared to design criteria. An indication on a display screen may indicate whether the fabricated speaker spider meets the design criteria.
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公开(公告)号：US20180020304A1
公开(公告)日：2018-01-18
申请号：US15416862
申请日：2017-01-26
Applicant: Shengrong Shi , Fuhu Zhang , Ronglin Linghu
Inventor： Shengrong Shi , Fuhu Zhang , Ronglin Linghu
CPC classification number: H04R29/003 , H04R7/127 , H04R7/18 , H04R9/025 , H04R9/06 , H04R2207/021 , H04R2499/11
Abstract: A loudspeaker is disclosed. The loudspeaker includes a frame; a vibration system accommodated in the frame, a voice coil for driving the voice diaphragm and a support installed at one end of the voice coil away from the voice diaphragm. The vibration system includes a voice diaphragm, and the support is connected to the frame for providing elastic support to the voice coil. The loudspeaker further includes a magnetic circuit system for driving the vibration system. The magnetic circuit system includes a yoke, a first magnet portion, and a second magnet portion. The second magnetic portion includes an auxiliary magnet and an auxiliary pole plate overlapped with the auxiliary magnet. A light source installed on the auxiliary pole plate and opposite to the support, and a photosensitive sensor arranged on the support and being within the irradiation scope of the light source are further provided.
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公开(公告)号：US20170347189A1
公开(公告)日：2017-11-30
申请号：US15365375
申请日：2016-11-30
Applicant: Broadcom Corporation
Inventor： Jes Thyssen
CPC classification number: H04R3/007 , G10L21/0232 , H03G3/3005 , H04R3/04 , H04R9/06 , H04R29/001 , H04R29/003 , H04R2499/11
Abstract: Systems, devices, and methods are described for providing loudspeaker protection. An upstream loudspeaker model estimation component receives sensed electrical characteristics of a loudspeaker and generates an impedance model from which an excursion model, and associated parameters, of the loudspeaker as well as a gain change parameter may be generated. The impedance components are fitted to features of an estimated impedance, based on the voltage and current sense data, to generate the estimated impedance model of the loudspeaker by combining the fitted impedance components. The resulting estimated impedance model is converted to an excursion model of the loudspeaker. A downstream audio signal processing component utilizes the excursion model, or parameters thereof, to limit a predicted excursion of the loudspeaker. Processed audio signals associated with the limited excursion are subject to distortion suppression prior to releasing the output audio signals for playback on the loudspeaker.
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公开(公告)号：US20170347188A1
公开(公告)日：2017-11-30
申请号：US15365336
申请日：2016-11-30
Applicant: Broadcom Corporation
Inventor： Jes Thyssen
IPC: H04R3/00 , H03G3/30 , G10L21/0232 , H04R9/06 , H04R29/00
CPC classification number: H04R3/007 , G10L21/0232 , H03G3/3005 , H04R3/04 , H04R9/06 , H04R29/001 , H04R29/003 , H04R2499/11
Abstract: Systems, devices, and methods are described for providing loudspeaker protection. An upstream loudspeaker model estimation component receives sensed electrical characteristics of a loudspeaker, estimates the impedance of the loudspeaker, fits an impedance model to the estimated impedance, and generates an excursion model of the loudspeaker and a gain change parameter from the estimated parameters of the impedance model. A downstream audio signal processing component utilizes the gain change parameter and the excursion model, or parameters thereof, to constrain the temperature of a voice coil of the loudspeaker and to limit a predicted excursion of the loudspeaker. The downstream audio signal processing component also utilizes processed signals associated with the constrained temperature and the limited excursion to suppress unwanted distortion for an output audio signal to be played back by the loudspeaker.
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公开(公告)号：US09826294B2
公开(公告)日：2017-11-21
申请号：US15598527
申请日：2017-05-18
Applicant: NXP B.V.
CPC classification number: H04R1/00 , H04R3/00 , H04R3/002 , H04R3/007 , H04R29/001 , H04R29/003
Abstract: A loudspeaker controller (1) for controlling a loudspeaker (2), configured to determine time-varying impedance information of the loudspeaker (2) based on a loudspeaker voltage and a measure of a loudspeaker current and provide for control of the loudspeaker (2) in accordance with said time-varying impedance information.
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公开(公告)号：US09820068B2
公开(公告)日：2017-11-14
申请号：US15011454
申请日：2016-01-29
Applicant: AAC Technologies Pte. Ltd.
Inventor： Yang Zhang
CPC classification number: H04R29/003 , H04R1/06 , H04R7/127 , H04R7/18 , H04R9/06 , H04R2307/204
Abstract: A micro speaker is disclosed. The micro speaker includes a diaphragm and a voice coil for driving the diaphragm, the diaphragm including a conductive dome and a suspension surrounding the conductive dome, the conductive dome including a plurality of units being isolated from each other; a conductive front cover located adjacent to and keeping a distance from the conductive dome; and a plurality of capacitors formed by the units of conductive dome and the conductive front cover for outputting electrical signals according to vibrations of the diaphragm and for detecting real-time replacement of the diaphragm.
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公开(公告)号：US20170176330A1
公开(公告)日：2017-06-22
申请号：US14977836
申请日：2015-12-22
Applicant: Intel Corporation
Inventor： Saku Lahti , Mikko S. Komulainen , Tapio Liusvaara
CPC classification number: H04R1/028 , G01N21/3504 , G01N27/00 , G01N33/497 , H04R1/2826 , H04R29/003 , H04R2400/00 , H04R2499/11
Abstract: A gas detection device includes an enclosure having an interior chamber, an audio loudspeaker in acoustic communication with the interior chamber of the enclosure, and a gas sensor configured to detect a gas within the interior chamber of the enclosure. The device may include a ventilation port configured to permit two-way gaseous communication between the interior chamber and an atmosphere external to the enclosure, where the atmosphere comprises the gas. The audio loudspeaker is configured to generate a pressure within the interior chamber. The pressure causes a portion of the external atmosphere to be drawn into the interior chamber via the ventilation port. The gas sensor may include an emitter and a receiver. The gas detection device can be integrated into a mobile electronic device, such as a smartphone or tablet computer.
