# US 12,114,124 B2 · Headset > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,124 B2 - Document ID: US12114124B2 - Status: Granted - Kind: B2 - Application number: 17/706,487 - Filed: 2022-03-28 - Published: 2022-07-14 - Granted: 2024-10-08 - Earliest claimed: 2019-09-27 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Rongrong Wu; Yong Zheng; Guozhen Ma; Naotaka Tsunoda; Xiansheng Li - Web page: https://patentgrep.com/patent/US12114124B2 ## CPC - G10K 11/04: Acoustic filters {; Acoustic resonators} - H04R 1/1083: {Reduction of ambient noise (active noise reduction per se G10K11/175; protective devices for the ear, e.g. providing acoustic protection A61F11/06)} - G10K 11/22: for conducting sound through hollow pipes, e.g. speaking tubes - H04R 1/1008: {Earpieces of the supra-aural or circum-aural type} - H04R 1/1033: {Cables or cables storage, e.g. cable reels (cord reels per se H02G11/02; arrangements for storing and repeatedly paying-out and re-storing lengths of conductors or cables B65H75/34; extensible conductors or cables, e.g. self-coiling cords H01B7/06)} - H04R 1/105: {Earpiece supports, e.g. ear hooks (for stereophonic headphones H04R5/0335)} - H04R 1/1075: {Mountings of transducers in earphones or headphones} - H04R 1/2807: {Enclosures comprising vibrating or resonating arrangements (for the reduction of undesired resonances or vibrations H04R1/2869)} - H04R 1/2873: {for loudspeaker transducers} - G10K 11/178: by electro-acoustically regenerating the original acoustic waves in anti-phase - G10K 2210/1081: Earphones, e.g. for telephones, ear protectors or headsets - H04R 1/1016: {Earpieces of the intra-aural type} - H04R 1/2826: {for loudspeaker transducers} - H04R 1/347: {for obtaining a phase-shift between the front and back acoustic wave} - H04R 5/033: Headphones for stereophonic communication {(details thereof, e.g. relating to batteries, cables or control elements H04R1/10)} - H04R 25/60: {Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles (ear wax retarders, e.g. mounting thereof H04R25/654)} - H04R 2205/022: Plurality of transducers corresponding to a plurality of sound channels in each earpiece of headphones or in a single enclosure - Y02D 30/70: in wireless communication networks - 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) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract Embodiments of this application disclose a noise reduction headset. A branch pipe is disposed in the headset to connect a sound cavity inside the headset and an external environment. The branch pipe has a low-pass filter function to filter out high-band noise entering the sound cavity from the external environment, so that impact on sound quality inside the sound cavity that is caused by noise in the external environment is reduced, thereby implementing passive noise reduction. ## Claims ### Claim 1 A headset receiver: a housing; a driver located inside the housing, wherein the driver is configured to: receive an audio signal and to convert the audio signal into a sound wave, a sound cavity is disposed inside the housing, wherein: the sound cavity comprises a front cavity and a rear cavity that are disposed adjacent to each other, the driver is disposed at a junction between the front cavity and the rear cavity, and the headset receiver further comprises a single multi-port branch pipe having three ports that acoustically connect the front cavity, the rear cavity, and an external environment. ### Claim 2 (depends on 1) The headset receiver according to claim 1, wherein the branch pipe is in a structural form of a three-way pipe, the three-way pipe comprises a hub pipe, a first pipe, a second pipe, and a third pipe, the first pipe, the second pipe, and the third pipe are all connected to the hub pipe, and the hub pipe is located in the rear cavity. ### Claim 3 (depends on 2) The headset receiver according to claim 2, wherein the three-way pipe comprises a hub pipe, a first pipe, and a second pipe, both the first pipe and the second pipe are connected to the hub pipe, the hub pipe is located in the rear cavity, and one or more openings are disposed in the hub pipe. ### Claim 4 (depends on 1) The headset receiver according to claim 1, wherein the branch pipe comprises a two-way pipe connecting the front cavity and the rear cavity and a two-way pipe connecting the rear cavity and the external environment. ### Claim 5 (depends on 1) The headset receiver according to claim 1, wherein the sound cavity further comprises an additional rear cavity, the branch pipe is further connected to the additional rear cavity, the additional rear cavity surrounds the outside of the rear cavity, one side of the rear cavity is adjacent to the front cavity, and the other side is adjacent to the additional rear cavity. ### Claim 6 (depends on 5) The headset receiver according to claim 5, wherein the branch pipe is in a structural form of a four-way pipe, the four-way pipe comprises a pipe A, a pipe B, a pipe C, a pipe D, and a hub pipe, the pipe A, the pipe B, the pipe C, and the pipe D are all connected to the hub pipe, and the hub pipe is located in the additional rear cavity, or the hub pipe crosses the rear cavity and the additional rear cavity. ### Claim 7 (depends on 5) The headset receiver according to claim 5, wherein the branch pipe comprises a three-way pipe connecting the front cavity, the rear cavity, and the additional rear cavity and a two-way pipe connecting the additional rear cavity and the external environment, the three-way pipe comprises a hub pipe, a first pipe, a second pipe, and a third pipe, the first pipe, the second pipe, and the third pipe are all connected to the hub pipe, and the hub pipe is located in the rear cavity or the additional rear cavity, or the hub pipe crosses the rear cavity and the additional rear cavity. ### Claim 8 (depends on 5) The headset receiver according to claim 5, wherein the branch pipe comprises a three-way pipe connecting the front cavity, the additional rear cavity, and the external environment and a two-way pipe connecting the rear cavity and the additional rear cavity, the three-way pipe comprises a hub pipe, a first pipe, a second pipe, and a third pipe, the first pipe, the second pipe, and the third pipe are all connected to the hub pipe, and the hub pipe is located in the additional rear cavity. ### Claim 9 (depends on 5) The headset receiver according to claim 5, wherein the branch pipe comprises a three-way pipe connecting the rear cavity, the additional rear cavity, and the external environment and a two-way pipe connecting the front cavity and the rear cavity, the three-way pipe comprises a hub pipe, a first pipe, a second pipe, and a third pipe, the first pipe, the second pipe, and the third pipe are all connected to the hub pipe, and the hub pipe is located in the additional rear cavity. ### Claim 10 (depends on 5) The headset receiver according to claim 5, wherein the branch pipe comprises a three-way pipe connecting the rear cavity, the additional rear cavity, and the external environment and a two-way pipe connecting the front cavity and the additional rear cavity, the three-way pipe comprises a hub pipe, a first pipe, a second pipe, and a third pipe, the first pipe, the second pipe, and the third pipe are all connected to the hub pipe, and the hub pipe is located in the additional rear cavity. ### Claim 11 (depends on 5) The headset receiver according to claim 5, wherein the branch pipe comprises a two-way pipe connecting the front cavity and the rear cavity, a two-way pipe connecting the rear cavity and the additional rear cavity, and a two-way pipe connecting the additional rear cavity and the external environment. ### Claim 12 (depends on 5) The headset receiver according to claim 5, wherein the branch pipe comprises a two-way pipe connecting the front cavity and the additional rear cavity, a two-way pipe connecting the rear cavity and the additional rear cavity, and a two-way pipe connecting the additional rear cavity and the external environment. ### Claim 13 (depends on 12) The headset receiver according to claim 12, wherein a ratio of a cross-sectional area to a length of a valid section of the low-pass filter pipe is less than or equal to 4 mm2/10 mm, and the valid section is a pipe section that is in the low-pass filter pipe and that substantially affects filter performance. ### Claim 14 (depends on 1) The headset receiver according to claim 1, wherein a part that is of the branch pipe and that is located between the front cavity and the external environment is a low-pass filter pipe, and the low-pass filter pipe is an elongated pipe. ### Claim 15 (depends on 1) The headset receiver according to claim 1, wherein a microporous channel is disposed in a rear cavity housing, there are one or more microporous channels, and the rear cavity housing is configured to surround the rear cavity. ### Claim 16 (depends on 1) The headset receiver according to claim 1, the single multi-port branch pipe having four ports that acoustically connect the front cavity, the rear cavity, and the external environment. ### Claim 17 A headset, wherein the headset comprises a headband and headset receivers connected to two ends of the headband, wherein each headset receiver comprises a housing and a driver located inside the housing, the driver is configured to: receive an audio signal, and convert the audio signal into a sound wave, a sound cavity is disposed inside the housing, the sound cavity comprises a front cavity and a rear cavity that are disposed adjacent to each other, the driver is disposed at a junction between the front cavity and the rear cavity, the headset receiver further comprises a single multi-port branch pipe having three ports that acoustically connect the front cavity, the rear cavity, and an external environment. ### Claim 18 (depends on 17) The headset according to claim 17, wherein the branch pipe is in a structural form of a three-way pipe, the three-way pipe comprises a hub pipe, a first pipe, a second pipe, and a third pipe, the first pipe, the second pipe, and the third pipe are all connected to the hub pipe, and the hub pipe is located in the rear cavity. ### Claim 19 (depends on 18) The headset according to claim 18, wherein the three-way pipe comprises a hub pipe, a first pipe, and a second pipe, both the first pipe and the second pipe are connected to the hub pipe, the hub pipe is located in the rear cavity, and one or more openings are disposed in the hub pipe. ### Claim 20 (depends on 17) The headset according to claim 17, wherein the branch pipe comprises a two-way pipe connecting the front cavity and the rear cavity and a two-way pipe connecting the rear cavity and the external environment. ### Claim 21 A headset, wherein the headset comprises a headset cable and a headset receiver, wherein the headset receiver comprises a housing and a driver located inside the housing, the driver is configured to: receive an audio signal, and convert the audio signal into a sound wave, a sound cavity is disposed inside the housing, the sound cavity comprises a front cavity and a rear cavity that are disposed adjacent to each other, the driver is disposed at a junction between the front cavity and the rear cavity, the headset receiver further comprises a single multi-port branch pipe having three ports that acoustically connect the front cavity, the rear cavity, and an external environment; and the headset cable is connected to a driver inside the headset receiver. ### Claim 22 (depends on 21) The headset according to claim 21, the single multi-port branch pipe having four ports that acoustically connect the front cavity, the rear cavity, and the external environment.