CN-114495888-B - Vehicle and control method thereof

Abstract

The invention relates to a vehicle and a control method thereof. Specifically, a vehicle that selectively provides important sounds to an occupant includes a microphone configured to receive noise, a speaker configured to store a plurality of sound waveforms and a warning sound source corresponding to each of the plurality of sound waveforms, a storage device configured to generate a noise cancellation signal based on the noise, and a controller configured to control the speaker to output a noise cancellation sound corresponding to the noise cancellation signal, compare a waveform of the noise with the plurality of sound waveforms when a sound pressure level of the noise is greater than a threshold, and control the speaker to play the warning sound source corresponding to the sound waveform matched with the noise when the waveform of the noise is matched with any one of the plurality of sound waveforms.

Inventors

• Pu Zhongpei
• JIN RONGFAN

Assignees

• 现代自动车株式会社
• 起亚株式会社

Dates

Publication Date

20260512

Application Date

20210805

Priority Date

20201023

Claims (18)

1. 1. A vehicle, comprising: a microphone configured to receive noise; a speaker; A storage device configured to store a plurality of sound waveforms and a warning sound source corresponding to each of the plurality of sound waveforms, and A controller configured to: Generating a noise cancellation signal based on the noise; Controlling the speaker to output a noise cancellation sound corresponding to the noise cancellation signal; Comparing the waveform of the noise with a plurality of sound waveforms when the sound pressure level of the noise is greater than a threshold; When the waveform of the noise matches any one of the plurality of sound waveforms, controlling the speaker to play a warning sound source corresponding to the sound waveform matching the noise; when the sound pressure level of the noise is greater than the threshold value and the waveform of the noise does not match all of the plurality of sound waveforms, the speaker is controlled to stop the output of the noise canceling sound until the sound pressure level of the noise is equal to or less than the threshold value.
2. 2. The vehicle of claim 1, wherein the controller is configured to: when the waveform of the noise is compared with the plurality of sound waveforms, the speaker is controlled to stop the output of the noise canceling sound.
3. 3. The vehicle of claim 1, wherein the controller is configured to: The threshold value is set based on at least one of an average sound pressure level of noise received via the microphone or a vehicle speed within a preset period of time.
4. 4. The vehicle of claim 1, wherein the controller is configured to: Classifying noise as single-shot noise or continuous noise based on a period of time when a sound pressure level of the noise is greater than a threshold; when the noise is classified as persistent noise, a distance between the noise source and the vehicle is determined based on the frequency of the noise.
5. 5. The vehicle of claim 1, wherein the controller is configured to: when the period of time during which the sound pressure level of the noise is greater than the threshold value is greater than or equal to the preset period of time, the volume of the warning sound source is adjusted in proportion to the frequency of the noise.
6. 6. The vehicle of claim 5, wherein the controller is configured to: the output intensity of the noise canceling sound is adjusted in inverse proportion to the frequency of the noise.
7. 7. The vehicle of claim 1, wherein the controller is configured to: When a warning sound source is played via a speaker, the speaker is controlled to reduce the output intensity of the noise cancellation sound.
8. 8. The vehicle of claim 1, wherein the controller is configured to: The volume of the warning sound source is determined based on the sound pressure level of the noise.
9. 9. The vehicle of claim 1, further comprising: A display device; Wherein the storage device is configured to store a warning message corresponding to each of a plurality of sound waveforms, The controller is configured to control the display device to output a warning message corresponding to a sound waveform matching the noise.
10. 10. The vehicle of claim 1, wherein the controller is configured to: Determining a sound waveform having a similarity with a waveform of noise equal to or greater than a preset value among the plurality of sound waveforms as a sound waveform matching with the noise; the preset value is changed according to environmental information around the vehicle.
11. 11. A control method of a vehicle, the control method comprising: receiving noise via a microphone; Generating a noise cancellation signal based on the noise; Controlling the speaker to output a noise cancellation sound corresponding to the noise cancellation signal; Comparing the waveform of the noise with a plurality of previously stored sound waveforms when the sound pressure level of the noise is greater than a threshold; when the waveform of the noise matches any one of the plurality of previously stored sound waveforms, controlling the speaker to play a warning sound source corresponding to the sound waveform matching the noise; when the sound pressure level of the noise is greater than the threshold value and the waveform of the noise does not match all of the plurality of previously stored sound waveforms, the speaker is controlled to stop the output of the noise canceling sound until the sound pressure level of the noise is equal to or less than the threshold value.
12. 12. The method as recited in claim 11, further comprising: When comparing the waveform of the noise with a plurality of previously stored sound waveforms, the speaker is controlled to stop the output of the noise canceling sound.
13. 13. The method as recited in claim 11, further comprising: The threshold value is set based on at least one of an average sound pressure level of noise received via the microphone or a vehicle speed within a preset period of time.
14. 14. The method of claim 11, further comprising: Classifying noise as single-shot noise or continuous noise based on a period of time when a sound pressure level of the noise is greater than a threshold; when the noise is classified as persistent noise, a distance between the noise source and the vehicle is determined based on the frequency of the noise.
15. 15. The method as recited in claim 11, further comprising: when the period of time during which the sound pressure level of the noise is greater than the threshold value is greater than or equal to the preset period of time, the volume of the warning sound source is adjusted in proportion to the frequency of the noise.
16. 16. The method as recited in claim 15, further comprising: the output intensity of the noise canceling sound is adjusted in inverse proportion to the frequency of the noise.
17. 17. A vehicle, comprising: a microphone configured to receive noise; a speaker; a storage device configured to store a plurality of sound waveforms, and A controller configured to: Generating a noise cancellation signal based on the noise; Controlling the speaker to output a noise cancellation sound corresponding to the noise cancellation signal; Comparing the waveform of the noise with a plurality of sound waveforms when the sound pressure level of the noise is greater than a threshold; Generating a warning sound source by correcting noise when the waveform of the noise matches any one of the plurality of sound waveforms, and controlling the speaker to play the warning sound source; when the sound pressure level of the noise is greater than the threshold value and the waveform of the noise does not match all of the plurality of sound waveforms, the speaker is controlled to stop the output of the noise canceling sound until the sound pressure level of the noise is equal to or less than the threshold value.
18. 18. The vehicle of claim 17, wherein the controller is configured to: the noise is corrected using an a-weighted filter, a B-weighted filter, a C-weighted filter, or a D-weighted filter.

Description

Vehicle and control method thereof Technical Field The present invention relates to a vehicle equipped with a noise cancellation function and a control method thereof, and more particularly, to a vehicle for selectively providing important sounds to an occupant and a control method thereof. Background The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. Noise cancellation is a technique that prevents noise by generating destructive interference that cancels noise after receiving ambient noise via a microphone. This is an active noise control (Active Noise Control, ANC). Recently, a noise canceling function is provided in a vehicle to block external and internal noise transmitted to an occupant, thereby providing a more comfortable environment for the occupant. However, the occupants in the vehicle must be able to hear important sounds such as the horn of another vehicle and the siren of an emergency vehicle. Disclosure of Invention Accordingly, the present invention provides a vehicle capable of outputting a corresponding warning sound source by selecting a sound that an occupant must recognize when operating a noise canceling function, and a control method thereof. According to one aspect of the invention, a vehicle includes a microphone configured to receive noise, a speaker configured to store a plurality of sound waveforms and a warning sound source corresponding to each of the plurality of sound waveforms, a storage device configured to generate a noise cancellation signal based on the noise and control the speaker to output a noise cancellation sound corresponding to the noise cancellation signal, and a controller configured to compare the waveform of the noise with the plurality of sound waveforms when a sound pressure level of the noise is greater than a threshold value and control the speaker to play the warning sound source corresponding to the sound waveform matched with the noise when the waveform of the noise is matched with any one of the plurality of sound waveforms. The controller may be configured to control the speaker to stop the output of the noise canceling sound when comparing the waveform of the noise with the plurality of sound waveforms. The controller may be configured to control the speaker to stop the output of the noise canceling sound until the sound pressure level of the noise is a threshold value or less when the sound pressure level of the noise is greater than the threshold value and the waveform of the noise does not match all of the plurality of sound waveforms. The controller may be configured to set the threshold based on at least one of an average sound pressure level of noise received via the microphone and a vehicle speed during a preset period of time. The controller may be configured to classify the noise as single-shot noise or persistent noise based on a period of time when the sound pressure level of the noise is greater than the threshold, and determine a distance between the noise source and the vehicle based on a frequency of the noise when the noise is classified as persistent noise. The controller may be configured to adjust the volume of the warning sound source in proportion to the frequency of the noise when a period of time in which the sound pressure level of the noise is greater than the threshold is greater than or equal to a preset period of time. The controller may be configured to adjust the output intensity of the noise cancellation sound in inverse proportion to the frequency of the noise. The controller may be configured to control the speaker to reduce the output intensity of the noise canceling sound when the warning sound source is played via the speaker. The controller may be configured to determine the volume of the warning sound source based on the sound pressure level of the noise. The vehicle may further include a display device, the storage device may be configured to store a warning message corresponding to each of the plurality of sound waveforms, and the controller may be configured to control the display device to output the warning message corresponding to the sound waveform matched with the noise. The controller may be configured to determine a sound waveform having a similarity to a waveform of the noise equal to or greater than a preset value among the plurality of sound waveforms as a sound waveform matching the noise, and may change the preset value according to environmental information around the vehicle. According to another aspect of the present invention, a control method of a vehicle includes receiving noise via a microphone, generating a noise cancellation signal based on the noise, controlling a speaker to output a noise cancellation sound corresponding to the noise cancellation signal, comparing a waveform of the noise with a plurality of previously stored sound waveforms when a sound pressure level of the noise is greater than a thre