An automotive horn adaptive regulation control system and method

Abstract

The application relates to a kind of automobile horn adaptive regulation control system and method, especially to the field of automobile technology, including initial module, to obtain the running state of automobile engine;Collection module, to real-time collection of automobile speed, ambient volume, ambient distance, vehicle height and automobile driving area;Control module, to control the sound volume of automobile horn, sound direction, also to adjust the sound angle of automobile horn under different modes;Correction module, to determine the driving environment of automobile according to the ambient volume, and correct the sound direction of automobile horn, the correction module is also used to correct the sound volume of automobile horn.The application provides a kind of automobile horn adaptive regulation control system and method, according to the driving process and driving scene of automobile, the sound volume, sound direction and sound angle of automobile horn are overall controlled, and the driving safety of automobile is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more particularly to an adaptive adjustment control system and method for automotive horns. Background Technology

[0002] As a crucial component of automobiles, car horns play multiple roles in various scenarios, including driving and theft prevention, serving as warning signals and responding to vehicle control signals. However, existing car horn technology has several issues requiring further improvement and optimization. Currently, most car horns use a direct-drive controller, resulting in a fixed horn outlet direction and limited volume adjustment capabilities. While simple, this design fails to meet the diverse needs of users in different scenarios. The horn's outlet direction significantly impacts sound pressure level and sound quality; at different locations on the vehicle, warning signals may not be effectively received, potentially creating safety hazards. Secondly, the sound quality and timbre of some car horns are unpleasant, easily causing discomfort and annoyance to drivers and pedestrians. Furthermore, the sound emitted by car horns at different angles is easily affected by the surrounding environment; for example, on noisy city roads, the sound of car horns is often masked by other noises, affecting their effectiveness.

[0003] Chinese Patent Publication No. CN114872621A discloses a method, system, device, equipment, and storage medium for controlling a car horn, including: in response to receiving a horn request, acquiring the vehicle's driving status information and environmental information; determining a horn mode based on the driving status information and environmental information, and controlling the car horn to sound according to the horn mode; the horn mode includes a high-pitched mode, a low-pitched mode, and a pedestrian warning mode. This solution does not provide overall control over the volume, direction, and angle of the car horn's sound, thus failing to effectively improve driving safety. Summary of the Invention

[0004] Therefore, the present invention provides an adaptive adjustment control system and method for automobile horns to overcome the problem of low driving safety in the prior art.

[0005] To achieve the above objectives, the present invention provides an adaptive adjustment control system for an automobile horn, comprising,

[0006] The initial module is used to determine whether the car engine is running based on the car engine speed, and also to determine whether to control the volume, direction and angle of the car horn after the car is woken up, based on whether the car engine is running.

[0007] The initial module is used to obtain the operating status of the car engine;

[0008] The data acquisition module is used to collect real-time data on vehicle speed, ambient noise, ambient distance, and vehicle height, and to collect real-time data on the vehicle's driving area via GPS.

[0009] The control module, when the car engine is running, is used to determine the road mode of the car based on the car speed, and control the volume and direction of the car horn according to the road mode. The road modes include highway mode and ordinary road mode. The control module is also used to adjust the sound angle of the car horn in different modes according to the vehicle height.

[0010] The calibration module, when the road mode is normal road mode, is used to determine the vehicle driving environment based on the ambient volume, and to correct the sound direction of the car horn based on the vehicle driving environment. The calibration module is also used to correct the sound volume of the car horn based on the vehicle driving area.

[0011] Furthermore, the initial module acquires the vehicle engine speed N and determines whether the vehicle engine is running based on the vehicle engine speed N, wherein,

[0012] When N > 0, the initial module determines that the car engine is running;

[0013] When N≤0, the initial module determines that the car engine is not running.

[0014] Furthermore, the control module acquires the vehicle speed V, compares the vehicle speed V with a preset vehicle speed V1, and determines the vehicle's road mode based on the comparison result.

[0015] When V≥V1, the control module determines that the vehicle's road mode is highway mode;

[0016] When V < V1, the control module determines that the vehicle's road mode is normal road mode.

[0017] Furthermore, the control module controls the volume and direction of the car horn according to the vehicle's road conditions.

[0018] When the car's road mode is highway mode, the control module controls the car horn to emit a volume of D1 and the direction of the sound is the direction of the car's forward movement.

[0019] When the car's road mode is normal road mode, the control module controls the car horn's volume to D2, and the sound direction needs to be corrected according to the car's driving environment.

[0020] Where D1 is the high volume, D2 is the normal volume, the ambient volume D0 is obtained, and D1 = k1 × D0, D2 = k2 × D0, k1 > k2 > 1.

[0021] Furthermore, the control module acquires the current vehicle height H, calculates and sets the horn adjustment angle Δθ based on the current vehicle height H, and...

[0022] △θ=arctan(H / H0×tanθ0)-θ0

[0023] Where △θ is the horn adjustment angle, θ0 is the initial horn angle, H is the current vehicle height, H0 is the initial vehicle height, the initial vehicle height refers to the vehicle height when the vehicle is stationary, and the initial horn angle θ0 is the angle between the central axis of the horn and the horizontal line when the vehicle is stationary, θ0 < 90°.

[0024] Furthermore, let θ be the angle at which the car horn emits sound, where θ = Δθ + θ0.

[0025] Furthermore, the correction module acquires the ambient volume D0, compares the ambient volume D0 with the preset volume D', and determines the vehicle's driving environment based on the comparison result.

[0026] When D0≥D', the correction module determines that the car driving environment is a busy urban environment;

[0027] When D0 < D', the correction module determines that the vehicle's driving environment is a non-urban environment.

[0028] Furthermore, when the car's road mode is normal road mode, the correction module corrects the direction of sound emission according to the car's driving environment.

[0029] When the car is driving in a busy urban environment, the correction module controls the sound output direction to be the direction the car is moving forward.

[0030] When the car is driving in a non-urban environment, the correction module obtains the environmental distance Li, i = 1, 2...n, where n is an integer and n ≥ 1, and obtains the minimum value Lmi n among the environmental distances. The correction module controls the sound emission direction to be towards the direction with the minimum environmental distance.

[0031] Furthermore, the correction module acquires the vehicle's driving area and corrects the volume of the car horn in normal road mode based on the vehicle's driving area.

[0032] When the vehicle is driving in a no-honking zone, the correction module controls the volume of the car horn to be 0.

[0033] When the vehicle is traveling in a normal area, the correction module does not correct the volume of the car horn.

[0034] On the other hand, the present invention also provides an adaptive adjustment control method for a car horn, comprising,

[0035] Step S1: Obtain the operating status of the car engine through the initial module;

[0036] Step S2: The acquisition module collects data in real time on vehicle speed, ambient sound, ambient distance, vehicle height, and vehicle driving area.

[0037] Step S3: When the car engine is running, the control module determines the road mode of the car and controls the volume and direction of the car horn according to the road mode. The control module also adjusts the sound angle of the car horn in different modes.

[0038] Step S4: When the road mode is normal road mode, the correction module determines the vehicle driving environment and corrects the sound direction of the car horn according to the vehicle driving environment. The correction module also corrects the sound volume of the car horn.

[0039] Compared with existing technologies, the beneficial effects of this invention are as follows: The initial module determines whether the car engine is running based on its speed after the car is woken up, thus preventing control of the car horn when the engine is not running, saving energy and improving driving safety. The acquisition module collects real-time data on vehicle speed, ambient volume, ambient distance, vehicle height, and driving area, controlling the horn's volume, direction, and angle based on the car's current status to further enhance driving safety. When the engine is running, the control module controls the horn's volume and direction based on the road mode, distinguishing between different horn modes. The control module dynamically controls the car horn to different volume levels, further improving driving safety. It adjusts the horn's sound angle based on the vehicle's height to optimize sound output and enhance safety. The calibration module also controls the horn's direction based on the driving environment, dynamically adjusting the horn for different road conditions. Furthermore, when the road mode is normal, the calibration module corrects the horn's volume to identify no-honking zones in everyday life, further improving driving safety.

[0040] In particular, the initial module determines whether the car engine is running based on the car engine speed N. When N is greater than 0, the initial module determines that the car engine is running. When N is less than or equal to 0, the initial module determines that the car engine is not running. Thus, the car horn is controlled in a targeted manner according to the different states of the engine, thereby improving the driving safety of the car.

[0041] In particular, when the vehicle speed V is greater than or equal to the preset vehicle speed V1, the control module determines that the vehicle's road mode is high-speed road mode to distinguish different road conditions and improve driving safety. When the vehicle speed V is less than the preset vehicle speed V1, the control module determines that the vehicle's road mode is ordinary road mode, thereby controlling the car horn accordingly to improve driving safety.

[0042] In particular, when the vehicle's road mode is highway mode, the control module controls the car horn to operate at a high volume with the sound emanating from the direction of the vehicle's movement. This ensures that the car horn volume is significantly increased in dangerous situations on highways, effectively alerting vehicles and pedestrians ahead and ensuring driving safety, thereby improving vehicle safety. When the vehicle's road mode is normal mode, the control module controls the car horn to operate at a normal volume, reducing the horn's volume and dynamically adjusting it according to the ambient volume, further enhancing vehicle safety.

[0043] In particular, the adjustment module calculates the sound-emitting angle of the car horn based on the vehicle height, thereby adjusting the sound-emitting angle of the car horn to achieve the best sound effect and further improve the driving safety of the vehicle.

[0044] In particular, the correction module determines the vehicle's driving environment based on the ambient volume, and then dynamically adjusts the car horn according to the ambient volume. It corrects the sound direction of the horn in normal road mode for different driving environments, further improving the vehicle's driving safety.

[0045] In particular, when the car is driving in a busy urban environment, the correction module controls the sound output direction to be in the direction the car is moving forward, so as to ensure that the car horn volume is sufficient to alert pedestrians in a busy urban environment, thereby ensuring driving safety and further improving the car's driving safety. When the car is driving in a non-busy urban environment, the correction module controls the sound output direction to be directed towards the nearest external object of the car body, thereby dynamically adjusting the sound output direction of the car horn according to the driving conditions, further improving the car's driving safety.

[0046] In particular, when the road mode is normal road mode, the correction module corrects the volume of the car horn, thereby filtering out no-honking zones in daily life scenarios and correcting the volume of the car horn in the no-honking zones to further improve the driving safety of the vehicle. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the adaptive adjustment control system for the car horn in this embodiment;

[0048] Figure 2 This is a flowchart illustrating the adaptive adjustment control method for car horns in this embodiment. Detailed Implementation

[0049] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0050] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0051] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0052] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] Please see Figure 1 As shown, this is a schematic diagram of the structure of the adaptive adjustment control system for car horns in this embodiment. The system includes...

[0054] The initial module is used to obtain the operating status of the car engine;

[0055] The data acquisition module is used to collect vehicle speed, ambient sound, ambient distance and vehicle height in real time, and to collect the vehicle's driving area in real time via GPS. The vehicle's driving area includes a no-honking area and a normal area, and it is connected to the initial module.

[0056] The control module, when the car engine is running, is used to determine the road mode of the car based on the car speed, and control the volume and direction of the car horn according to the road mode. The road modes include highway mode and ordinary road mode. The control module is also used to adjust the sound angle of the car horn in different modes according to the vehicle height. It is connected to the acquisition module.

[0057] The calibration module, when the road mode is normal road mode, is used to determine the vehicle driving environment based on the ambient volume and to correct the sound direction of the car horn based on the vehicle driving environment. The calibration module is also used to correct the sound volume of the car horn based on the vehicle driving area, and it is connected to the control module.

[0058] Specifically, the initial module determines whether the car engine is running based on its RPM after the car is woken up. Therefore, it does not control the car horn when the engine is not running, saving energy and improving driving safety. The data acquisition module collects real-time data on vehicle speed, ambient volume, ambient distance, vehicle height, and driving area. Based on the current vehicle status, it controls the horn's volume, direction, and angle to further enhance driving safety. When the engine is running, the control module controls the horn's volume and direction based on the road mode, distinguishing different horn volumes in different modes. The system dynamically controls the car horn to further improve driving safety. The control module adjusts the horn's sound angle based on the vehicle's height to optimize sound output and enhance safety. The calibration module also controls the horn's sound direction based on the driving environment, dynamically adjusting the horn for different road conditions. Furthermore, when the road mode is normal, the calibration module adjusts the horn's volume to identify no-honking zones in everyday life, further improving driving safety.

[0059] Specifically, the initial module acquires the vehicle engine speed N, and determines whether the vehicle engine is running based on the vehicle engine speed N.

[0060] When N > 0, the initial module determines that the car engine is running;

[0061] When N≤0, the initial module determines that the car engine is not running.

[0062] Specifically, the initial module determines whether the car engine is running based on the engine speed N. When N is greater than 0, the initial module determines that the car engine is running; when N is less than or equal to 0, the initial module determines that the car engine is not running. This allows for targeted control of the car horn based on the engine's different states, improving driving safety. It is understood that this embodiment does not specifically limit the method for determining whether the engine is running. Those skilled in the art can freely set the method, as long as it identifies the running engine. For example, a sensor could be used to acquire the engine temperature; when the engine temperature exceeds a preset value, the engine is determined to be running.

[0063] Specifically, the control module acquires the vehicle speed V, compares the vehicle speed V with a preset vehicle speed V1, and determines the vehicle's road mode based on the comparison result. The vehicle's road mode refers to the road condition mode of the road on which the vehicle is driving, including highway mode and ordinary road mode.

[0064] When V≥V1, the control module determines that the vehicle's road mode is highway mode;

[0065] When V < V1, the control module determines that the vehicle's road mode is normal road mode.

[0066] Specifically, when the vehicle speed V is greater than or equal to the preset vehicle speed V1, the control module determines that the vehicle's road mode is high-speed road mode to distinguish different road conditions and improve driving safety. When the vehicle speed V is less than the preset vehicle speed V1, the control module determines that the vehicle's road mode is ordinary road mode, thereby controlling the car horn accordingly to improve driving safety.

[0067] Specifically, the control module controls the volume and direction of the car horn based on the vehicle's road conditions.

[0068] When the car's road mode is highway mode, the control module controls the car horn to emit a volume of D1 and the direction of the sound is the direction of the car's forward movement.

[0069] When the car's road mode is normal road mode, the control module controls the car horn's volume to D2, and the sound direction needs to be corrected according to the car's driving environment.

[0070] Where D1 is the high volume, D2 is the normal volume, the ambient volume D0 is obtained, and D1 = k1 × D0, D2 = k2 × D0, k1 > k2 > 1.

[0071] Specifically, when the vehicle's road mode is highway mode, the control module controls the car horn to operate at a high volume with the sound emanating from the direction of the vehicle's movement. This ensures that in dangerous situations on highways, the car horn volume is significantly increased to effectively alert vehicles and pedestrians ahead, thus ensuring driving safety and improving overall vehicle safety. When the vehicle's road mode is normal mode, the control module controls the car horn to operate at a normal volume, reducing the horn's volume and dynamically adjusting it according to ambient noise levels, further enhancing driving safety.

[0072] Specifically, the adjustment module obtains the current vehicle height H, calculates and sets the horn adjustment angle △θ based on the current vehicle height H, and sets it accordingly.

[0073] △θ=arctan(H / H0×tanθ0)-θ0

[0074] Where △θ is the horn adjustment angle, θ0 is the initial horn angle, H is the current vehicle height, H0 is the initial vehicle height, the initial vehicle height refers to the vehicle height when the vehicle is stationary, and the initial horn angle θ0 is the angle between the central axis of the horn and the horizontal line when the vehicle is stationary, θ0 < 90°.

[0075] Specifically, the adjustment module calculates the sound-emitting angle of the car horn based on the vehicle height, and adjusts the sound-emitting angle of the car horn to optimize the sound effect of the car horn and further improve the driving safety of the vehicle.

[0076] Specifically, the sound-emitting angle of the car horn is set to θ, where θ = Δθ + θ0.

[0077] Specifically, this embodiment does not limit the method of adjusting the sound angle of the car horn. Those skilled in the art can freely set it, such as setting the sound angle of the car horn to be adjusted by the horn smart terminal through the drive motor, or setting the sound angle of the car horn to be adjusted by the vehicle domain controller directly driving the motor.

[0078] Specifically, the correction module acquires the ambient volume D0, compares it with a preset volume D', and determines the vehicle's driving environment based on the comparison result. The ambient volume refers to the average volume of the environment in which the vehicle is located.

[0079] When D0≥D', the correction module determines that the car driving environment is a busy urban environment;

[0080] When D0 < D', the correction module determines that the vehicle's driving environment is a non-urban environment.

[0081] Specifically, the correction module determines the vehicle's driving environment based on the ambient volume, and then dynamically adjusts the car horn according to the ambient volume. It corrects the sound direction of the normal road mode for different driving environments, thereby further improving the vehicle's driving safety.

[0082] Specifically, when the car's road mode is normal road mode, the correction module corrects the direction of sound emission according to the car's driving environment.

[0083] When the car is driving in a busy urban environment, the correction module controls the sound output direction to be the direction the car is moving forward.

[0084] When the car is driving in a non-urban environment, the correction module obtains the environmental distance Li, i = 1, 2...n, where n is an integer and n ≥ 1, and obtains the minimum value Lmi n among the environmental distances. The correction module controls the sound emission direction to be towards the direction with the minimum environmental distance. The environmental distance refers to the distance between the car body and the objects outside the car body in the car driving environment. The environmental distance is obtained through the echolocation sensor.

[0085] Specifically, when the car is driving in a busy urban environment, the correction module controls the sound output direction to be in the direction the car is moving forward, so as to ensure that the car horn volume is sufficient to alert pedestrians in a busy urban environment, thereby ensuring driving safety and further improving the car's driving safety. When the car is driving in a non-busy urban environment, the correction module controls the sound output direction to be directed towards the nearest external object of the car body, thereby dynamically adjusting the sound output direction of the car horn according to the driving conditions, further improving the car's driving safety.

[0086] Specifically, the correction module acquires the vehicle's driving area and corrects the volume of the car horn in normal road mode based on the vehicle's driving area.

[0087] When the vehicle is driving in a no-honking zone, the correction module controls the volume of the car horn to be 0.

[0088] When the vehicle is traveling in a normal area, the correction module does not correct the volume of the car horn.

[0089] Specifically, when the road mode is normal road mode, the correction module corrects the volume of the car horn to filter out no-honking zones in daily life scenarios. In these no-honking zones, the volume of the car horn is corrected to further improve driving safety.

[0090] Please see Figure 2 As shown, this is the adaptive adjustment control method for the car horn described in this embodiment, including:

[0091] Step S1: Obtain the operating status of the car engine through the initial module;

[0092] Step S2: The acquisition module collects data in real time on vehicle speed, ambient sound, ambient distance, vehicle height, and vehicle driving area.

[0093] Step S3: When the car engine is running, the control module determines the road mode of the car and controls the volume and direction of the car horn according to the road mode. The control module also adjusts the sound angle of the car horn in different modes.

[0094] Step S4: When the road mode is normal road mode, the correction module determines the vehicle driving environment and corrects the sound direction of the car horn according to the vehicle driving environment. The correction module also corrects the sound volume of the car horn.

[0095] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A car horn adaptive adjustment control system, characterized in that, include, The initial module is used to obtain the operating status of the car engine; The data acquisition module is used to collect real-time data on vehicle speed, ambient noise, ambient distance, and vehicle height, and to collect real-time data on the vehicle's driving area via GPS. The control module, when the car engine is running, is used to determine the road mode of the car based on the car speed, and control the volume and direction of the car horn according to the road mode. The road modes include highway mode and ordinary road mode. The control module is also used to adjust the sound angle of the car horn in different modes according to the vehicle height. The correction module, when the road mode is normal road mode, is used to determine the vehicle driving environment based on the ambient volume and to correct the sound direction of the car horn based on the vehicle driving environment. The correction module is also used to correct the sound volume of the car horn based on the vehicle driving area. The control module acquires the current vehicle height H, calculates and sets the horn adjustment angle △θ based on the current vehicle height H. △θ=arctan(H / H0×tanθ0)-θ0; Where △θ is the horn adjustment angle, θ0 is the initial horn angle, H is the current vehicle height, H0 is the initial vehicle height, the initial vehicle height refers to the vehicle height when the vehicle is stationary, and the initial horn angle θ0 is the angle between the central axis of the horn and the horizontal line when the vehicle is stationary, θ0 < 90°. Let the sound-emitting angle of the car horn be θ, where θ = Δθ + θ0; The correction module acquires the ambient volume D0, compares it with the preset volume D', and determines the vehicle's driving environment based on the comparison result. When D0≥D', the correction module determines that the car driving environment is a busy urban environment; When D0 < D', the correction module determines that the vehicle driving environment is a non-urban environment; When the car's road mode is normal road mode, the correction module corrects the direction of sound emission according to the car's driving environment. When the car is driving in a busy urban environment, the correction module controls the sound output direction to be the direction the car is moving forward. When the car is driving in a non-urban environment, the correction module obtains the environmental distance Li, i=1,2...n, where n is an integer and n≥1, and obtains the minimum value Lmin among the environmental distances. The correction module controls the sound emission direction to be towards the direction with the minimum environmental distance.

2. The adaptive adjustment control system for automobile horns according to claim 1, characterized in that, The initial module acquires the engine speed N of the car and determines whether the car engine is running based on the engine speed N. When N > 0, the initial module determines that the car engine is running; When N≤0, the initial module determines that the car engine is not running.

3. The adaptive adjustment control system for automobile horns according to claim 1, characterized in that, The control module acquires the vehicle speed V, compares it with a preset vehicle speed V1, and determines the vehicle's road mode based on the comparison result. When V≥V1, the control module determines that the vehicle's road mode is highway mode; When V < V1, the control module determines that the vehicle's road mode is normal road mode.

4. The adaptive adjustment control system for automobile horns according to claim 3, characterized in that, The control module controls the volume and direction of the car horn based on the vehicle's road conditions. When the car's road mode is highway mode, the control module controls the car horn to emit a volume of D1 and the direction of the sound is the direction of the car's forward movement. When the car's road mode is normal road mode, the control module controls the car horn's volume to D2, and the sound direction needs to be corrected according to the car's driving environment. Where D1 is the high volume, D2 is the normal volume, the ambient volume D0 is obtained, and D1 is set to k1×D0, D2=k2×D0, k1>k2>1.

5. The adaptive adjustment control system for automobile horns according to claim 4, characterized in that, The correction module acquires the vehicle's driving area and corrects the volume of the car horn in normal road mode based on the vehicle's driving area. When the vehicle is driving in a no-honking zone, the correction module controls the volume of the car horn to be 0. When the vehicle is traveling in a normal area, the correction module does not correct the volume of the car horn.

6. A method applied to an adaptive adjustment control system for an automobile horn as described in any one of claims 1-5, characterized in that, include, Step S1: Obtain the operating status of the car engine through the initial module; Step S2: The acquisition module collects data in real time on vehicle speed, ambient sound, ambient distance, vehicle height, and vehicle driving area. Step S3: When the car engine is running, the control module determines the road mode of the car and controls the volume and direction of the car horn according to the road mode. The control module also adjusts the sound angle of the car horn in different modes. Step S4: When the road mode is normal road mode, the correction module determines the vehicle driving environment and corrects the sound direction of the car horn according to the vehicle driving environment. The correction module also corrects the sound volume of the car horn.

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