# US 12,002,443 B2 · Sound control device and control method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,002,443 B2 - Document ID: US12002443B2 - Status: Granted - Kind: B2 - Application number: 17/901,408 - Filed: 2022-09-01 - Published: 2023-06-15 - Granted: 2024-06-04 - Earliest claimed: 2021-12-09 - Assignees: Hyundai Motor Company; Kia Corporation - Applicants: Hyundai Motor Company; Kia Corporation - Inventors: Jung Keun You; Jong Won Lee; Kaang Dok Yee; Chi Sung Oh; Hyun Jin Song - Web page: https://patentgrep.com/patent/US12002443B2 ## CPC - G10K 11/17815: {between the reference signals and the error signals, i.e. primary path} - G10K 11/17879: {using both a reference signal and an error signal} - G10K 11/17813: {characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms} - G10K 11/1783: {handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions} - G10K 11/17883: {the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed} - G10K 11/17885: {additionally using a desired external signal, e.g. pass-through audio such as music or speech} - H04R 3/00: Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F) - H04R 3/007: {Protection circuits for transducers} - G10K 2210/12821: Rolling noise; Wind and body noise - G10K 2210/3035: Models, e.g. of the acoustic system - G10K 2210/3212: Actuator details, e.g. composition or microstructure - H04R 2410/05: Noise reduction with a separate noise microphone - H04R 2430/01: Aspects of volume control, not necessarily automatic, in sound systems - H04R 2499/13: Acoustic transducers and sound field adaptation in vehicles - 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 A sound control device mounted in a vehicle and control method thereof includes obtaining whether an audio function is ON or OFF, and determining a maximum limit value for a displacement of a speaker due to a noise control signal according to whether the audio function is ON or OFF. ## Claims ### Claim 1 A method for controlling a sound control apparatus in a vehicle, the method comprising: obtaining, by an acquisition unit, whether an audio function is ON or OFF; and determining, by a determining unit, a maximum limit value for a displacement of a speaker due to a noise control signal according to whether the audio function is ON or OFF. ### Claim 2 (depends on 1) The method of claim 1, wherein the determining includes: determining, by the determining unit, the maximum limit value as a preset first limit value in response to determining that the audio function is ON; and determining, by the determining unit, the maximum limit value as a second preset limit value in response to determining that the audio function is OFF, and wherein the second limit value is greater than the first limit value. ### Claim 3 (depends on 2) The method of claim 2, wherein the first limit value is a value of 0.5 mm or less than 0.5 mm, and the second limit value is a value of 1.5 mm or more than 1.5 mm. ### Claim 4 (depends on 1) The method of claim 1, wherein the determining includes: determining, by the determining unit, the maximum limit value as a preset first limit value in response to determining that the audio function is ON. ### Claim 5 (depends on 1) The method of claim 1, wherein the determining includes: determining, by the determining unit, the maximum limit value as a second preset limit value in response to determining that the audio function is OFF. ### Claim 6 (depends on 1) The method of claim 1, wherein the obtaining includes: obtaining, by the acquisition unit, a signal indicating whether the audio function is ON or OFF from an Audio, Video, and Navigation (AVN) device in the vehicle. ### Claim 7 (depends on 1) The method of claim 1, further including: adjusting, by an adjustment unit, the noise control signal based on the determined maximum limit value. ### Claim 8 (depends on 7) The method of claim 7, wherein the adjusting includes: determining, by the adjustment unit, an attenuation coefficient for the noise control signal based on the determined maximum limit value, and applying the attenuation coefficient to the noise control signal. ### Claim 9 (depends on 8) The sound control apparatus of claim 8, wherein the determining unit is further configured to: determine the maximum limit value as a preset first limit value in response to determining that the audio function is ON. ### Claim 10 (depends on 8) The sound control apparatus of claim 8, wherein the determining unit is further configured to: determine the maximum limit value as a second preset limit value in response to determining that the audio function is OFF. ### Claim 11 A sound control apparatus comprising: an acquisition unit configured to obtain whether an audio function is ON or OFF; and a determining unit configured to determine a maximum limit value for a displacement of a speaker due to a noise control signal according to whether the audio function is ON or OFF. ### Claim 12 (depends on 9) The sound control apparatus of claim 9, wherein the determining unit is further configured to: determine the maximum limit value as a preset first limit value in response to the audio function being ON, and determine the maximum limit value as a second preset limit value in response to the audio function being OFF, and wherein the second limit value is greater than the first limit value. ### Claim 13 (depends on 10) The sound control apparatus of claim 10, wherein the first limit value is a value of 0.5 mm or less than 0.5 mm, and the second limit value is a value of 1.5 mm or more than 1.5 mm. ### Claim 14 (depends on 11) The sound control apparatus of claim 11, wherein the acquisition unit is configured to: obtain a signal indicating whether the audio function is ON or OFF from an Audio, Video, and Navigation (AVN) device in the vehicle. ### Claim 15 (depends on 11) The sound control apparatus of claim 11, further including: an adjustment unit configured to adjust the noise control signal based on the determined maximum limit value. ### Claim 16 (depends on 15) The sound control apparatus of claim 15, wherein the adjustment unit is further configured to determine an attenuation coefficient for the noise control signal based on the determined maximum limit value, and to apply the attenuation coefficient to the noise control signal.