# US 2016/0365083 A1 · Low-Power-Consumption Active Noise-Reduction In-Ear Music Headphones and Method for Noise Reduction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0365083 A1 - Document ID: US20160365083A1 - Status: Published application - Kind: A1 - Application number: 15/109,135 - Filed: 2015-06-03 - Published: 2016-12-15 - Earliest claimed: 2015-02-09 - Assignees: Shenzhen Aerospace Golden Shine Technology Co., Ltd - Applicants: Shenzhen Aerospace Golden Shine Technology Co.,Ltd. - Inventors: Qingshan Bao; Shangfeng Shi - Web page: https://patentgrep.com/patent/US20160365083A1 ## CPC - G10K 11/17885: {additionally using a desired external signal, e.g. pass-through audio such as music or speech} - G10K 11/17854: {the filter being an adaptive filter} - G10K 11/17855: {for improving speed or power requirements} - G10K 11/17873: {using a reference signal without an error signal, e.g. pure feedforward} - H04R 1/1016: {Earpieces of the intra-aural type} - H04R 3/00: Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F) - G10K 2210/1081: Earphones, e.g. for telephones, ear protectors or headsets - G10K 2210/3028: Filtering, e.g. Kalman filters or special analogue or digital filters - G10K 2210/3214: Architectures, e.g. special constructional features or arrangements of features - H04R 2460/01: Hearing devices using active noise cancellation - H04R 2460/03: Aspects of the reduction of energy consumption in hearing devices - G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) ## Abstract The present invention relates to a low-power-consumption active noise-reduction in-ear music headphone and a method for noise reduction. The headphone comprises an audio plug, in-ear earplugs and a noise-reduction control board, wherein the noise-reduction control board comprises a low-power-consumption active noise reduction circuit, which comprises a noise processing channel, an audio signal channel, and a sound mixing circuit connected with output ends of the two channels; and the sound mixing circuit is a by-pass switch consisting of two mutually independent low voltage drop diodes. The method comprises: processing ambient noise signal to generate a reverse noise signal, mixing the reverse noise signal with an audio signal, and outputting the mixed sound to a loudspeaker to generate a sound wave containing reverse noise in an auricular cavity, in which the reverse noise and the ambient noise transmitted into the auricular cavity from an environment counteract with each other to reduce noise. ## Claims ### Claim 1 A low-power-consumption active noise-reduction in-ear music headphone, comprising an audio plug, in-ear earplugs and a noise-reduction control board connected therebetween, wherein said noise-reduction control board comprises a low-power-consumption active noise reduction circuit, which comprises a noise processing channel (20) for processing a sampled signal of ambient noise, an audio signal channel (40), and a sound mixing circuit (50) connected with output ends of said two channels; said sound mixing circuit is a by-pass switch consisting of two mutually independent low voltage drop diodes (51 and 52); and positive electrodes of said two diodes (51 and 52) are connected with the output ends of said two channels correspondingly, and negative electrodes of the same are connected with two wiring terminals of loudspeakers (60) in said earplugs correspondingly. ### Claim 2 (depends on 1) The low-power-consumption active noise-reduction in-ear music headphone according to claim 1, wherein voltage drops of said two diodes are both less than 0.1V. ### Claim 3 (depends on 1) The low-power-consumption active noise-reduction in-ear music headphone according to claim 1, wherein said noise processing channel (20) comprises an analog filter (21) and an adaptive digital filter (22), which are in connection from an input end to an output end of said channel in sequence. ### Claim 4 (depends on 3) The low-power-consumption active noise-reduction in-ear music headphone according to claim 3, wherein said analog filter is a low-pass filter having an amplification and phase inversing module. ### Claim 5 (depends on 3) The of low-power-consumption active noise-reduction in-ear music headphone according to claim 3, wherein said adaptive digital filter comprises a wavetrap module. ### Claim 6 (depends on 3) The low-power-consumption active noise-reduction in-ear music headphone according to any one of claims 3, wherein the acoustic features of said loudspeakers are matched with acoustic features of said noise processing channel. ### Claim 7 (depends on 1) The low-power-consumption active noise-reduction in-ear music headphone according to claim 1, wherein said noise processing channel comprises two inputs, one being a sound pick-up configured on said noise-reduction control board or said earplug and the other being a sound pick-up on an audio source device connected through said audio plug, and said two inputs are connected with a selector switch. ### Claim 8 A method for noise reduction of a low-power-consumption in-ear music headphone, comprising: processing an ambient noise signal collected through a sound pick-up by a noise processing channel to generate a reverse noise signal corresponding to ambient noise to be output to one input end of a by-pass switch, mixing said reverse noise signal with an audio signal from the other input end of said by-pass switch together by said by-pass switch, and outputting the mixed sound to the same loudspeaker to generate a sound wave containing reverse noise in an auricular cavity, in which said reverse noise and said ambient noise transmitted into the auricular cavity from an environment counteract with each other to realize noise reduction. ### Claim 9 (depends on 8) The method for noise reduction of the low-power-consumption in-ear music headphone according to claim 8, wherein processing said ambient noise signal in said noise processing channel comprises: carrying out rapid amplification, low-pass filtering and phase reversing by an analog filter at first, and then processing by an adaptive digital filter. ### Claim 10 (depends on 9) The method for noise reduction of the low-power-consumption in-ear music headphone according to claim 9, wherein the processing performed by said adaptive digital filter on said noise signal comprises: discretization processing, waveform correcting, filtering, and automatic adjusting of frequency, phase, frequency change rate and amplitude of said signal. ### Claim 11 (depends on 4) The low-power-consumption active noise-reduction in-ear music headphone according to claim 4, wherein the acoustic features of said loudspeakers are matched with acoustic features of said noise processing channel. ### Claim 12 (depends on 5) The low-power-consumption active noise-reduction in-ear music headphone according to claim 5, wherein the acoustic features of said loudspeakers are matched with acoustic features of said noise processing channel.