Sound control device of vehicle and method for controlling the same
AssigneesHyundai Motor Company, Kia Corporation
InventorsJung Keun You, Jong Won Lee, Kaang Dok Yee, Chi Sung Oh, Hyun Jin Song
Life of this patent
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Abstract
A sound control device and a method for controlling the sound control device in a vehicle. The method comprises obtaining an error signal indicating residual noise in the vehicle, and an audio signal; calculating magnitudes of low frequency components of the error signal; adjusting magnitudes of low frequency components of the audio signal according to the magnitudes of the low frequency components of the error signal; and outputting the adjusted audio signal through a speaker.
Claims10
A method for controlling a sound control device in a vehicle, the method comprising:
- generating a first noise control signal based on a transfer function and delay time of a primary path between a sensor for measuring an acceleration signal of the vehicle as a reference signal and a speaker, and outputting the first noise control signal through the speaker;
- obtaining an error signal corresponding to residual noise remaining after noise in the vehicle is attenuated by the first output noise control signal and an audio signal;
- calculating magnitudes of low frequency components of the error signal;
- adjusting magnitudes of low frequency components of the audio signal according to the magnitudes of the low frequency components of the error signal;
- and
- outputting the adjusted audio signal through the speaker,
- wherein the obtaining of the error signal comprises:
- predicting the error signal at the speaker based on the transfer function of the primary path, and
- wherein the method further comprises:
- generating a second noise control signal further based on the error signal fed back from a microphone for measuring an acoustic signal in the vehicle and a transfer function and delay time of a secondary path between the speaker and the microphone;
- and
- outputting the second noise control signal through the speaker.
A sound control device in a vehicle comprising:
- a controller configured to generate a first noise control signal based on a transfer function and delay time of a primary path between a sensor for measuring an acceleration signal of the vehicle as a reference signal and a speaker;
- an acquisition unit configured to obtain an error signal corresponding to residual noise remaining after noise in the vehicle is attenuated by the first output noise control signal and an audio signal;
- a calculation unit configured to calculate magnitudes of low frequency components of the error signal;
- an adjustment unit configured to adjust magnitudes of low frequency components of the audio signal according to the magnitudes of the low frequency components of the error signal;
- and
- an output unit configured to output the first noise signal and the adjusted audio signal through the speaker,
- wherein the controller is further configured to:
- predict the error signal at the speaker based on the transfer function of the primary path, and
- generate a second noise control signal further based on the error signal fed back from a microphone for measuring an acoustic signal in the vehicle and a transfer function and delay time of a secondary path between the speaker and the microphone, and
- wherein the output unit is further configured to output the second noise control signal through the speaker.
Dependencies are inferred from the claim text.