Goertek Inc.

Chinese Academy of Sciences

Song Liu

Bo Li

Shasha Lou

Jian Zhao

Na Li

Linzhang Wang

Yang Hua

Fupo Wang

Tao Zhang

Bin Liu

Xiaodong Cai

Yanqiang Huang

Yitao Liu

Hui Qi

Yanyan Hou

Ronge Xing

Huahua Yu

Chengxin Xu

Hongbin Yang

Pengcheng Li

A speaker module and an electronic device are disclosed, comprises a module casing, a speaker unit and a linear motor module. The module casing is provided with a mounting cavity; the speaker unit is provided in the mounting cavity and comprises a magnetic circuit system provided with a mounting groove; the linear motor module is provided in the mounting cavity and comprises a housing, a coil and a vibrating assembly; the housing comprises a body part and a protrusion protruding outward; the body part is at a bottom of the magnetic circuit system; the protrusion extends into the mounting groove; the coil is provided in the protrusion part; the vibrating assembly is provided in the body part. The overall structure of the speaker module may be more compact, the speaker unit and the linear motor module may be controlled independently which improves the use effect of the speaker module.

Speaker module and electronic device

The present invention relates to a graphene material inlaid with single metal atoms, the preparation method thereof and its application of being used as the catalyst for the electroreduction of carbon dioxide. The graphene material inlaid with single metal atoms comprises single metal atoms and graphene; the single metal atoms are dispersed in the framework of the graphene; and the graphene is at least one selected from N doped graphene and N and S co-doped graphene. The material is used for the electrochemical reduction reaction of carbon dioxide, which significantly improves the utilization efficiency of the metal atoms and enhances the catalytic activity for the electroreduction of carbon dioxide, improves the catalytic stability, inhibits effectively the hydrogen evolution reaction, improves the selectivity for CO product, and broadens the electric potential window of reducing carbon dioxide to generate CO.

Graphene material inlaid with single metal atoms and preparing method and application thereof

A method and a system for achieving a self-adaptive surround sound. The method comprises: recognizing specific positions of a room and a user in the room by using an object recognition technology, capturing focusing images of recognized objects by controlling a camera using a focusing control technology, and recording corresponding focusing parameters (S); calculating position information of the room relative to the camera and position information of the user relative to the camera according to the images and the parameters (S); calculating sound beams that can achieve the surround sound at the position of the user in said room according to aforesaid calculated position information of the room and the user (S); obtaining parameters of a filter group according to the calculated sound beams, and adjusting the filter group of a loudspeaker array according to the parameters (S); and playing an audio signal via the loudspeaker array after the audio signal is filtered by the filter group that has been adjusted according to the parameters to form surround sound at the position of the user in the room (S).

Method and system for achieving self-adaptive surround sound

The present invention provides a step counting method and device. The method comprises the following steps performed repeatedly: a) obtaining three monoaxial acceleration signals with a predetermined length from triaxial output of a triaxial acceleration sensor worn on a walkrunner; b) performing high-pass filtering on each obtained monoaxial acceleration signal; c) performing pitch detection on each high-pass filtered monoaxial acceleration signal; d) using the pitch obtained in each pitch detection as a cut-off frequency to set a low-pass or band-pass filter, and performing low-pass or band-pass filtering on corresponding high-pass filtered monoaxial acceleration signal by using it; e) obtaining acceleration signal extreme value points from each low-pass or band-pass filtered monoaxial acceleration signal and removing interfering extreme value points therein; f) counting the number of the acceleration signal extreme value points after the interfering extreme value points have been removed; g) determining the accumulative walkrun step number of the walkrunner. The method can count steps accurately.

Step counting method and device

A noise-reduction control method includes performing frequency-domain weighting and temporal-domain weighting to a noise signal collected at current time to obtain a weighted energy. Judging whether active noise-reduction control is needed based on the weighted energy; calculating an energy value of a first sub-band and an energy value of a second sub-band of the noise signal collected by the feedforward microphone at the current time, wherein the first sub-band and the second sub-band are determined based on a feedforward noise-reduction curve and a feedback noise-reduction curve of the earphone, respectively. Determining a feedforward noise-reduction amount and a feedback noise-reduction amount based on the energy value of the first sub-band and the energy value of the second sub-band, respectively. Controlling the earphone to perform feedforward noise reduction based on the feedforward noise-reduction amount, and controlling the earphone to perform feedback noise reduction based on the feedback noise-reduction amount.

Active noise-reduction earphones and noise-reduction control method and system for the same

An earphone control method, an earphone control system and an earphone. The earphone control method includes: selecting a motion state judgement parameter of a wearer for controlling an earphone and setting an alert condition according to the selected motion state judgement parameter; real-timely monitoring and acquiring behavior data of the earphone wearer; calculating the motion state judgement parameter by using the acquired behavior data to obtain a motion state judgement parameter value; and judging whether or not the motion state judgement parameter value satisfies the alert condition; if the motion state judgement parameter value satisfies the alert condition, determining to enter an earphone alert state and controlling to perform corresponding alert operation on the earphone.

Earphone control method, earphone control system and earphone

A photoelectric type pulse signal measuring method includes, obtaining a main-path light signal transmitted by a photoelectric transmitter and reflected back from a surface of skin having an artery underneath, obtaining at least one auxiliary-path light signal receiving an ambient light signal, and based on the at least one auxiliary-path light signal, adaptively filtering an ambient light interference from the main-path light signal and obtaining an adaptive filtration result; or obtaining at least one auxiliary-path light signal transmitted by the same photoelectric transmitter and reflected back from a surface of skin without any artery underneath, and based on the auxiliary-path light signal, adaptively filtering a motion interference from the main-path light signal; then extracting a pulse signal from the adaptive filtration result. The present invention can simply and effectively eliminate the ambient light interference or motion interference upon photoelectric pulse signal measurement. Photoelectric type pulse signal measuring devices are also disclosed.

Photoelectric type pulse signal measuring method and apparatus

The present method comprises: providing a feedforward microphone outside of each earphone of the active noise-reduction earphones; detecting an amount of external noise by using the feedforward microphone; calculating a weighted energy of a noise signal; and determining whether it is needed to activate the active noise-reduction system based on the weighted energy. When the active noise-reduction control is needed, calculating energy values of two sub-bands, corresponding to the feedforward noise-reduction amount and the feedback noise-reduction amount respectively, in the noise signal, thereby determining the noise-reduction amounts of the feedforward noise reduction system and the feedback noise-reduction system, and controlling the earphone to perform corresponding feedforward noise reduction and feedback noise reduction. Compared with the existing active noise-reduction technologies with a fixed noise reduction, the present invention can optimize the noise-reduction effect.

The present invention discloses a tweeter and a method for realizing omnidirectional high pitch sound field. The tweeter has advantages of small volume and low cost and comprises a first tweeter unit corresponding to a left sound track, a second tweeter unit corresponding to a right sound track, a radiation structure formed by a plurality of horns. In this technical solution, the tweeter has stereo effect and realizes 360&#xb0; sound field of the high pitch portion with a smaller volume by disposing that the number of the horns of the left sound track is the same as the number of the horns of the right sound track in the radiation structure, the horns of the left sound track and the horns of the right sound track are disposed at intervals, and the plurality of horns are disposed evenly on a whole plane.

Tweeter and method for realizing omnidirectional high pitch sound field

The present invention discloses a howling suppression method and device applied to an ANR earphone. The method comprises: collecting signals by using a first microphone and a second microphone; wherein the first microphone is arranged in a position outside an auditory meatus when said ANR earphone is worn, and the second microphone is arranged in a position inside the auditory meatus when the ANR earphone is worn; according to a relation between signals collected by the first microphone and the second microphone, judging whether the current state of said ANR earphone is a state unable to produce a howling or a state able to produce a howling; and when the current state of said ANR earphone is a state able to produce a howling, starting processing for preventing howling production. The technical scheme can achieve that the ANR earphone does not produce a howling all the time.

Howling suppression method and device applied to an ANR earphone

The present invention discloses a method and an apparatus for earphone sound effect compensation and an earphone. The method of the present invention comprises: obtaining monitored signal data in a current wearing state of an earphone user according to a signal collected by a monitoring microphone and an audio signal played by a loudspeaker of the earphone; computing error data of the monitored signal data in the current wearing state relative to standard signal data in a standard wearing state of the earphone; and performing sound effect compensation to the earphone according to the error data. The technical solution of the present invention adopts an adaptive digital signal processing manner, which can dynamically compensate for sound effects in different earphone wearing manners and enable an earphone user to appreciate an audible effect in a standard earphone wearing state.

Method and apparatus for earphone sound effect compensation and an earphone

The present invention discloses a method and a device for suppressing residual echoes. The method comprises: performing adaptive filtering on M transmitter signals respectively to obtain M adaptive filtered signals; performing array-filtering 5 on the M&#x2212;1 adaptive filtered signals other than the first adaptive filtered signal to obtain M&#x2212;1 array-filter output signals by considering relative positions of the receiver and each of the transmitters and the time delay attributed to distances between the transmitters and the receiver; subtracting each of the M&#x2212;1 array-filter output signals from the first adaptive filtered signal respectively to obtain M&#x2212;1 difference signals, performing time-domain/frequency-domain conversion on the M&#x2212;1 difference signals respectively and selecting one of the frequency-domain signals that has the least energy; performing time-domain/frequency-domain conversion on the first adaptive filtered signal and the Madaptive filtered signal and then performing speech probability filtering on the converted first adaptive filtered signal and the converted Madaptive filtered signal to obtain one frequency-domain speech probability signal; and multiplying the frequency-domain speech probability signal with the selected signal that has the least energy, and performing frequency-domain/time-domain conversion on the multiplication result to obtain a signal as a transmitter output signal. The technical solutions of the present invention can suppress the residual echoes effectively without impairing near end speech.

Method and device for suppressing residual echoes based on inverse transmitter receiver distance and delay for speech signals directly incident on a transmitter array

The present invention discloses a heart rate detection method used in an earphone and an earphone capable of detecting heart rate. The method comprises: providing a cavity inside the earphone and installing a microphone in the cavity; a shell of the earphone is provided with a hole at a position where an opening of the cavity clings to, and when the earphone is worn, the cavity and the auricle which the hole clings to form an enclosed space; collecting signals generated by pressure change in the cavity by the microphone when the earphone is worn; and detecting heart rate according to the signals collected by the microphone. According to the technical scheme of the invention, the microphone is placed in the enclosed cavity formed by the cavity in the earphone and the shell of the earphone, which reduces interference of external noises, and reinforces signal information collected by the microphone.

Heart rate detection method used in earphone and earphone capable of detecting heart rate

The present invention discloses a heart rate detection method used in an earphone and an earphone capable of detecting heart rate. The method comprises: providing a cavity inside the earphone, and installing a microphone in the cavity; providing an acceleration sensor in the earphone; performing self-adaptive filtering process on signals collected by the acceleration sensor, and obtaining estimated signals of the signals generated by body movement of a wearer in the signals collected by the microphone; subtracting the estimated signals from the signals collected by the microphone to obtain signals related to heart rate; and detecting heart rate according to the signals related to heart rate. The technical scheme of the invention adopts an enclosed cavity to place the microphone to reduce interference of external noises and reinforce signal information collected by the microphone. By performing self-adaptive filtering on signals collected by the acceleration sensor to obtain estimated signals, subtracting the estimated signals from the signals collected by the microphone, and then detecting the heart rate, the influence of the body movement of the wearer on heart rate detection can be eliminated.

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Weifang, China

Song Liu