Vehicle-mounted sound system and vehicle

Abstract

The invention provides a vehicle-mounted sound system and a vehicle, the vehicle-mounted sound system comprises a first loudspeaker, the first loudspeaker comprises a shell and a vibrating diaphragm, the vibrating diaphragm is arranged in the shell, a rear sound cavity is formed behind the vibrating diaphragm, and the shell is provided with a guide hole communicated with the rear sound cavity; wherein the first loudspeaker is used for being installed in a vehicle body, the front portion of the vibrating diaphragm is used for facing a passenger compartment, and the guide hole is used for being communicated with the external releasing opening. When the first loudspeaker works, the vibrating diaphragm can generate forward sound waves and backward sound waves, the forward sound waves can be transmitted to a passenger compartment in the vehicle to play audio in the vehicle, and the backward sound waves can be transmitted to the external playing port through the rear sound cavity and the guide port to play audio out of the vehicle through the external playing port. The first loudspeaker not only can support audio playing in the vehicle, but also can support audio playing outside the vehicle, so that a loudspeaker function can be realized without additionally arranging a plurality of loudspeakers and other hardware specially used for playing outside the vehicle in the vehicle, the occupation of space resources in the vehicle is reduced, and the development cost of the vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle audio systems, and in particular to a vehicle audio system and a vehicle. Background Art

[0002] At present, users' requirements for vehicle audio functions have extended from traditional in-vehicle entertainment to diversified scenarios, and external audio playback is one of the current hot scenarios. However, traditional vehicle audio systems can often only provide excellent audio experiences for in-vehicle users, and it is difficult for the audio system to expand outside the vehicle. To solve this problem, some vehicles are also equipped with dedicated external audio systems, which are composed of multiple speakers installed outside the vehicle. However, this design requires adding multiple dedicated speakers for external playback on the vehicle, not only occupying more layout space resources, but also increasing additional development costs. Summary of the Invention

[0003] In view of this, a vehicle audio system and a vehicle are provided, which can solve the problem of insufficient lubrication of the transmission mechanism in the case of extreme inclination angles and reduce the failure risk.

[0004] In the first aspect of the present application, a vehicle audio system is provided. The vehicle audio system is applied to a vehicle, which includes a vehicle body. There is an occupant compartment inside the vehicle body, and an external playback port is provided on the outer side of the vehicle body. The vehicle audio system includes a first speaker, which includes a housing and a diaphragm. The diaphragm is disposed inside the housing, and a rear sound cavity is formed behind the diaphragm. The housing is provided with a guiding hole communicating with the rear sound cavity. Among them, the first speaker is used to be installed inside the vehicle body, and the front of the diaphragm is used to face the occupant compartment to play audio inside the vehicle; the guiding hole is used to communicate with the external playback port to play audio outside the vehicle.

[0005] In some embodiments, the first speaker further includes a guiding tube, which is connected to the outer side of the housing. One end of the guiding tube communicates with the guiding hole, and the other end of the guiding tube communicates with the external playback port.

[0006] In some embodiments, the first speaker is installed at the rear side of the vehicle body.

[0007] In some embodiments, the vehicle audio system further includes a second speaker, which is used to be installed on the vehicle body. The frequency band corresponding to the first speaker is lower than the frequency band corresponding to the second speaker.

[0008] In some embodiments, the first speaker includes one or more combinations of a low-frequency speaker and a subwoofer.

[0009] In some embodiments, the second speaker includes one or more combinations of a mid-frequency speaker, a mid-high frequency speaker, and a full-frequency speaker.

[0010] In some embodiments, the second speaker is installed on the front side of the vehicle body and is located outside the passenger compartment.

[0011] In some embodiments, the in-vehicle audio system further includes a host. Both the first speaker and the second speaker are electrically connected to the host. The host is configured to perform frequency division on the sound source signal to obtain a first audio signal and a second audio signal corresponding to different frequency bands. The first speaker is configured to emit sound in response to the first audio signal, and the second speaker is configured to emit sound in response to the second audio signal.

[0012] A second aspect of the present application provides a vehicle, which includes a vehicle body and the in-vehicle audio system provided in the first aspect. There is a passenger compartment inside the vehicle body, and an external speaker opening is provided on the outer side of the vehicle body. The first speaker is installed inside the vehicle body, and the front of the diaphragm faces the passenger compartment to play audio inside the vehicle. The guiding hole is communicated with the external speaker opening to play audio outside the vehicle.

[0013] In some embodiments, a wheel arch cover is provided at the bottom of the vehicle body, and the external speaker opening is formed in the wheel arch cover. The first speaker is installed at the rear side of the vehicle body, and the first speaker is provided with a guiding tube. One end of the guiding tube is communicated with the guiding hole, and the other end of the guiding tube is communicated with the external speaker opening.

[0014] With the in-vehicle audio system and the vehicle provided by the present application, when the first speaker works, the diaphragm will generate forward sound waves and backward sound waves. The forward sound waves can be conducted to the passenger compartment inside the vehicle to play audio inside the vehicle, and the backward sound waves can be conducted to the external speaker opening through the rear sound cavity and the guiding opening to play audio outside the vehicle through the external speaker opening. In this way, the first speaker can not only provide support for playing audio inside the vehicle, but also support playing audio outside the vehicle. The external playback function can be realized without additionally adding multiple hardware such as speakers specifically for playing audio outside the vehicle in the vehicle, reducing the occupation of the interior space resources of the vehicle and lowering the vehicle development cost. Moreover, by using the design that the rear sound cavity is communicated with the outside of the vehicle through the guiding hole, while the forward sound waves are conducted to the inside of the vehicle, the backward sound waves can be conducted to the outside of the vehicle, reducing the cancellation caused by the opposite phases between the forward sound waves and the backward sound waves and avoiding the occurrence of sound short-circuit phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic module diagram of the in-vehicle audio system provided by an embodiment of the present application.

[0016] Figure 2 It is a first schematic structural diagram of the vehicle provided by an embodiment of the present application.

[0017] Figure 3 It is a second schematic structural diagram of the vehicle provided by an embodiment of the present application.

[0018] Figure 4 It is a first flowchart of the control method of the in-vehicle audio system provided by an embodiment of the present application.

[0019] Figure 5 This is the second process schematic diagram of the control method for the in-vehicle audio system provided by the embodiments of the present application.

[0020] Description of Main Component Symbols 100, In-vehicle audio system; 10, First speaker; 11, Housing; 12, Diaphragm; 13, Rear sound cavity; 14, Guide hole; 15, Guide tube; 20, Second speaker; 30, Host; 200, Vehicle body; 201, Passenger compartment; 202, Engine compartment; 203, Trunk; 204, External speaker port; 205, Wheel arch cover; 206, Wheel. Detailed Embodiments

[0021] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present application.

[0022] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "side", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0023] In the description of the present application, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0024] Before further elaborating on the embodiments of the present application, the nouns and terms involved in the embodiments of the present application are described. The nouns and terms involved in the embodiments of the present application are applicable to the following explanations.

[0025] Speaker: A transducer device used to convert electrical signals into sound waves. Its core function is to drive the diaphragm to vibrate the air through electromagnetic, piezoelectric, or electrostatic effects, thereby generating audible sound waves. Common speakers include three main parts: a diaphragm, a magnetic circuit assembly, and a sound cavity. Among them, the diaphragm and the magnetic circuit assembly are fixed inside a housing, and the diaphragm and the magnetic circuit assembly are arranged opposite to each other. The sound cavity includes a front sound cavity and a rear sound cavity. The front sound cavity is located in front of the diaphragm, and the housing is provided with a sound outlet hole communicating with the front sound cavity. The rear sound cavity is located behind the diaphragm. When the diaphragm works, it will generate forward sound waves and backward sound waves, and the forward sound waves and backward sound waves are out of phase. The forward sound waves are externally emitted through the front sound cavity and the sound outlet hole. To solve the problem that the amplitudes of the forward sound waves and the backward sound waves cancel each other out after superposition, resulting in a significant decrease in low-frequency response, some speakers are designed with a phase inversion structure to align the phase of the backward sound waves with the forward sound waves, which plays a gain role in the forward sound waves.

[0026] Frequency band: The frequency range of sound waves. For different speakers, the frequency bands of the audio that they can effectively reproduce are different. Classified by frequency band, speakers can be divided into subwoofer speakers, woofer speakers, mid-woofer speakers, midrange speakers, mid-tweeter speakers, tweeter speakers, and full-range speakers, etc.

[0027] Vehicle audio system: It includes multiple speakers installed in the vehicle, and the multiple speakers are controlled by a control host. The vehicle audio system can be divided into two categories according to its use: entertainment audio system and pedestrian warning system. The traditional entertainment audio system is used to play audio inside the vehicle and is composed of various speakers that support different frequency bands. Each type of speaker is arranged according to its sound effect experience. For example, subwoofer speakers and woofer speakers are arranged in the trunk, doors, under the seats, etc.; tweeter speakers are arranged at the A-pillars, instrument panels, ceilings, etc. of the vehicle; mid-woofer speakers, midrange speakers, and mid-tweeter speakers are arranged at the doors, instrument panels, etc. of the vehicle.

[0028] The pedestrian warning system is mainly a pedestrian warning speaker, which is usually installed at the front engine compartment, front grille, front bumper, front buffer beam, etc. of the vehicle, and is mainly used to emit warning sounds outside the vehicle to make up for the potential safety hazards for pedestrians caused by the silent characteristics of electric vehicles.

[0029] Frequency division and tuning: Frequency division divides the full-frequency signal into different frequency bands to be allocated to the speakers most suitable for the corresponding frequency bands, thereby realizing sound quality optimization and speaker protection. The methods of frequency division processing include: power frequency division, electronic frequency division, etc. Tuning refers to adjusting parameters such as frequency response and dynamic range to achieve the optimization and artistic processing of sound. For example, adjusting volume, gain, and compression range, etc.

[0030] In response to: used to represent the conditions or states on which the executed operations depend. When the dependent conditions or states are met, one or more of the executed operations can be real-time or have a set delay; without special instructions, there is no restriction on the execution order of multiple executed operations.

[0031] Some embodiments will be described below in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0032] As Figures 1 to 3 shown, the present application first provides a vehicle audio system 100. The vehicle audio system 100 is applied to a vehicle. The vehicle includes a vehicle body 200 and the vehicle audio system 100. The vehicle audio system 100 is disposed on the vehicle body 200. The vehicle body 200 has a passenger compartment 201 inside. The vehicle body 200 has a front side and a rear side relative to the passenger compartment 201. The front side is the part close to the vehicle head, and the rear side is the part close to the vehicle tail. The front side of the vehicle body 200 has an engine compartment 202, the rear side of the vehicle body 200 has a trunk 203, doors are provided on both sides of the vehicle body 200, and an external speaker 204 is provided on the outside of the vehicle body 200. Among them, the outside of the vehicle body 200 refers to the part of the vehicle body 200 located outside the passenger compartment 201. For example, the outside of the door of the vehicle body 200, under the chassis of the vehicle body 200, the outside of the roof of the vehicle body 200, etc.

[0033] The vehicle audio system 100 has two working modes, namely an in-vehicle mode and an out-of-vehicle mode. When the playback mode is the in-vehicle mode, the vehicle audio system 100 can play audio inside the vehicle, that is, play audio inside the passenger compartment 201. When the playback mode is the out-of-vehicle mode, the vehicle audio system 100 can play audio outside the vehicle, that is, play audio outside the passenger compartment 201.

[0034] In this way, the application of the vehicle audio system 100 can extend to diversified scenarios. For example, in the scenario of normal driving, the user can set the playback mode to the in-vehicle mode, and the vehicle audio system 100 can play music inside the vehicle; in the scenario of outdoor camping, the user can set the playback mode to the out-of-vehicle mode, and the vehicle audio system 100 can play music outside the vehicle to create a corresponding activity atmosphere.

[0035] In the example of the present application, the vehicle further includes wheels 206 and a suspension. Among them, the suspension is fixed to the bottom of the vehicle body 200, and the wheels 206 are connected to the suspension. A wheel arch cover 205 is also provided at the bottom of the vehicle body 200. The wheel arch cover 205 is correspondingly arranged with the wheels 206, and the wheel arch cover 205 is entirely located above the corresponding wheels 206.

[0036] In this embodiment, the in-vehicle audio system 100 includes a first speaker 10. The first speaker 10 includes a housing 11 and a diaphragm 12. Among them, the diaphragm 12 is disposed inside the housing 11, and a rear sound cavity 13 is formed behind the diaphragm 12. The housing 11 is provided with a guiding hole 14 communicating with the rear sound cavity 13. The first speaker 10 is used to be installed inside the vehicle body 200, and the front of the diaphragm 12 is used to face the passenger compartment 201 to play audio inside the vehicle. The guiding hole 14 is used to communicate with the external speaker outlet 204 to play audio outside the vehicle.

[0037] It should be noted that the front of the diaphragm 12 facing the passenger compartment 201 means that the front of the diaphragm 12 is directly facing or obliquely facing the passenger compartment 201, so that the forward sound waves generated by the diaphragm 12 can be radiated to the passenger compartment 201.

[0038] Specifically, the first speaker 10 further includes a magnetic driver and a guiding tube 15. The magnetic driver is disposed inside the housing 11, and the diaphragm 12 is disposed opposite to the magnetic driver. The guiding tube 15 is connected to the outside of the housing 11. One end of the guiding tube 15 communicates with the guiding hole 14 and is fixed to the housing 11, and the other end of the guiding tube 15 communicates with the external speaker outlet 204. The guiding tube 15 establishes a sound wave conduction channel between the guiding hole 14 and the external speaker outlet 204 to ensure that the backward sound waves can be conducted to the external speaker outlet 204.

[0039] Among them, the shape and length of the guiding tube 15 can be set according to the relative positions of the guiding hole 14 and the external speaker outlet 204. The guiding tube 15 is made of a material with high rigidity and high density as a whole. Specific materials include but are not limited to: engineering plastics (such as ABS, PVC), metals (such as copper, aluminum, stainless steel), composite materials (such as carbon fiber), etc., to reduce the resonance of the tube wall of the guiding tube 15 and reduce the sound energy loss. The inner wall of the guiding tube 15 is smooth to reduce the air flow friction noise.

[0040] When the first speaker 10 works, the diaphragm 12 will generate forward sound waves and backward sound waves. The forward sound waves can be conducted to the passenger compartment 201 inside the vehicle to play audio inside the vehicle, and the backward sound waves can be conducted to the external speaker outlet 204 through the rear sound cavity 13 and the guiding port to play audio outside the vehicle through the external speaker outlet 204. In this way, the first speaker 10 can not only support playing audio inside the vehicle, but also support playing audio outside the vehicle. It is not necessary to additionally install multiple speakers and other hardware specifically for playing audio outside the vehicle in the vehicle to achieve the external speaker function, reducing the occupation of the vehicle interior space resources and reducing the vehicle development cost.

[0041] Moreover, by using the design that the rear sound cavity 13 communicates with the outside of the vehicle through the guiding hole 14, while the forward sound waves are conducted to the inside of the vehicle, the backward sound waves can be conducted to the outside of the vehicle, reducing the cancellation caused by the opposite phases between the forward sound waves and the backward sound waves and avoiding the occurrence of the sound short-circuit phenomenon.

[0042] In some embodiments, the vehicle audio system 100 further includes a second speaker 20. The second speaker 20 is installed on the vehicle body 200. The first speaker 10 and the second speaker 20 are respectively used to play audio of different frequency bands, and the frequency band corresponding to the first speaker 10 is lower than the frequency band corresponding to the second speaker 20.

[0043] In this way, the first speaker 10 can play audio with a relatively low frequency band, and the second speaker 20 can play audio with a relatively high frequency band, enabling the first speaker 10 and the second speaker 20 to work together to achieve frequency band complementarity, improving the overall performance of the audio system, and achieving the effects of dynamic expansion and sound field optimization.

[0044] In some embodiments, the vehicle audio system 100 further includes a host 30. The first speaker 10 and the second speaker 20 are both electrically connected to the host 30. Among them, the host 30 is installed inside the vehicle body 200. The host 30 can be a digital signal processor, a passive crossover, etc. In this application, the host 30 is a digital signal processor. The host 30 is used to process the audio to be played and send it to the first speaker 10 and the second speaker 20 to drive the first speaker 10 and the second speaker 20 to emit sound.

[0045] Specifically, the host 30 is used to divide the frequency of the sound source signal to obtain a first audio signal and a second audio signal corresponding to different frequency bands. The first speaker 10 is used to emit sound in response to the first audio signal, and the second speaker 20 is used to emit sound in response to the second audio signal. Exemplarily, the frequency of the first audio signal is less than or equal to 150 hz, and the frequency of the second audio signal is greater than or equal to 150 hz.

[0046] In some embodiments, the first speaker 10 includes one or a combination of a low-frequency speaker and a subwoofer. Exemplarily, the first speaker 10 is a subwoofer.

[0047] It can be understood that due to the characteristics of low-frequency signals, such as long wavelength, strong diffraction ability, and weak directivity, low-frequency signals are more likely to cause a decrease in efficiency due to acoustic short-circuit compared to high-frequency signals. In this application, the first speaker 10 adopts a design with a vent hole 14 connected to the outside of the vehicle, which can eliminate the phenomenon of acoustic short-circuit, ensure the clarity and transient response of low-frequency signals, significantly improve the audio effect of the first speaker 10, and effectively radiate low-frequency signals to the outside of the vehicle.

[0048] In some embodiments, the first speaker 10 is installed at the rear side of the vehicle. The external speaker outlet 204 is located below the first speaker 10, and the external speaker outlet 204 is opened on the wheel arch cover 205. The guiding tube 15 is integrally arranged at the rear side of the vehicle. One end of the guiding tube 15 is connected to the vent hole 14 of the first speaker 10 located at the rear side of the vehicle, and the other end of the guiding tube 15 is connected to the external speaker outlet 204 located on the wheel arch cover 205 and is fixed to the wheel arch cover 205.

[0049] Exemplarily, the number of the first speakers 10 is 1, and the first speaker 10 is installed in the trunk 203. The trunk 203 has sufficient space for various speakers to be set during factory production. By setting the first speaker 10 in the trunk 203, it is more conducive to the assembly of the first speaker 10 and reduces the degree of modification to the structure of the vehicle body 200 itself, which is beneficial to production.

[0050] It should be noted that in the example of the present application, the number of the first speakers 10 is 1, and the first speaker 10 is set at the trunk 203. In other embodiments, multiple first speakers 10 can also be configured. The multiple first speakers 10 can be set at different positions or the same position inside the vehicle body 200. The positions where they can be set include doors, under the seats, etc. The position of the external speaker outlet 204 can be adjusted according to the position of the first speaker 10, and the structure of the guiding tube 15 can be adjusted according to the relative positions of the first speaker 10 and the external speaker outlet 204. The present application does not limit this.

[0051] Exemplarily, the number of the external speaker outlets 204 is 1, and the external speaker outlet 204 is opened on the wheel arch cover 205. By opening the external speaker outlet 204 on the wheel arch cover 205, on the one hand, the external speaker outlet 204 can be hidden at the bottom of the vehicle body 200 to avoid damaging the appearance integrity of the vehicle body 200. On the other hand, the position of the wheel arch cover 205 is higher than the top surface of the tire and higher than the vehicle's safe wading line, so that the position of the external speaker outlet 204 is higher than the vehicle's safe wading line, reducing the risk of water ingress into the external speaker outlet 204 during vehicle wading.

[0052] It should be noted that in the example of the present application, the number of the external speaker outlets 204 is 1. In other embodiments, multiple external speaker outlets 204 can also be configured. The multiple external speaker outlets 204 can be respectively opened on different wheel arch covers 205 or on the same wheel arch cover 205. When both the first speaker 10 and the external speaker outlet 204 have multiple ones and the first speaker 10 and the external speaker outlet 204 are in one-to-one correspondence, multiple guiding tubes 15 can also be configured. The multiple guiding tubes 15 are respectively connected between the first speaker 10 and the corresponding external speaker outlet 204. That is, the number and position of the guiding tubes 15 can be adjusted according to the first speaker 10 and the external speaker outlet 204. The present application does not limit this.

[0053] In some embodiments, a protective grille for blocking the external speaker outlet 204 can be provided at the wheel arch cover 205 to protect the external speaker outlet 204 and prevent sundries outside the vehicle from entering the external speaker outlet 204.

[0054] It should be noted that, in the examples of the present application, the distance between the external speaker outlet 204 and the first speaker 10 is relatively far, and the external speaker outlet 204 is docked with the guiding hole 14 through the guiding tube 15, enabling effective sound wave conduction; in other embodiments, if the distance between the external speaker outlet 204 and the first speaker 10 is relatively close, the external speaker outlet 204 and the guiding hole 14 can also be directly docked. For example, the external speaker outlet 204 is opened on the outside of the vehicle body 200 at the trunk 203, the first speaker 10 is installed on the inside of the vehicle body 200 at the trunk 203, and the external speaker outlet 204 is communicated with the guiding hole 14. The installation method of the first speaker 10 can be configured according to the space and position inside the vehicle body 200, and the present application does not limit this.

[0055] In some embodiments, the second speaker 20 includes one or a combination of a mid-frequency speaker, a mid-high frequency speaker, and a full-frequency speaker. The second speaker 20 is disposed on the front side of the vehicle body 200 and is located outside the passenger compartment 201. Exemplarily, the second speaker 20 is a full-frequency speaker or a pedestrian warning sound speaker, and the second speaker 20 is disposed below the engine compartment 202.

[0056] It can be understood that the engine compartment 202 of the vehicle body 200 has sufficient space for setting the pedestrian warning speaker at the factory. By disposing the second speaker 20 in the engine compartment 202, it is more conducive to assembling the second speaker 20 and reduces the degree of modification to the structure of the vehicle body 200 itself, which is beneficial to production.

[0057] It should be noted that, in the examples of the present application, the number of the second speakers 20 is 1, and the second speaker 20 is disposed at the engine compartment 202. In other embodiments, multiple second speakers 20 can also be configured. The multiple second speakers 20 can be disposed at different positions or the same position. The positions where they can be disposed include the front grille, the front bumper, etc., and the present application does not limit this.

[0058] The present application also provides a vehicle, which includes a vehicle body 200 and the in-vehicle audio system 100 as described in the above embodiments. Among them, there is a passenger compartment 201 inside the vehicle body 200, and an external speaker outlet 204 is disposed on the outside of the vehicle body 200.

[0059] Specifically, the vehicle further includes wheels 206 and a suspension. Among them, the suspension is fixed to the bottom of the vehicle body 200, and the wheels 206 are connected to the suspension. A wheel arch cover 205 is further disposed at the bottom of the vehicle body 200. The wheel arch cover 205 is correspondingly disposed with the wheels 206, and the whole wheel arch cover 205 is located above the corresponding wheels 206. The external speaker outlet 204 is opened on the wheel arch cover 205. The first speaker 10 is installed on the rear side of the vehicle body 200. The first speaker 10 is provided with a guiding tube 15. One end of the guiding tube 15 is communicated with the guiding hole 14, and the other end of the guiding tube 15 is communicated with the external speaker outlet 204.

[0060] Specifically, the in-vehicle audio system 100 includes a first speaker 10, a second speaker 20, and a main unit 30. The first speaker 10 and the second speaker 20 are electrically connected to the main unit 30 respectively. The main unit 30 is configured to process the audio to be played to obtain a low-frequency signal and a high-frequency signal. Among them, the low-frequency signal is sent to the first speaker 10 to drive the first speaker 10 to emit sound, and the high-frequency signal is sent to the second speaker 20 to drive the second speaker 20 to emit sound. The main unit 30 can be communicatively connected to an operation terminal, which can be a device such as a mobile phone, a tablet computer, or an in-vehicle center console screen. The user can send a control instruction to the main unit 30 through the operation terminal to control the switching of the working mode of the in-vehicle audio system 100 and to control the in-vehicle audio system 100 to play a specified audio.

[0061] In the embodiments of the present application, the in-vehicle audio system 100 of the vehicle has two working modes, namely, an in-vehicle mode and an out-of-vehicle mode. When the playback mode is the in-vehicle mode, the in-vehicle audio system 100 can play audio inside the vehicle, that is, play audio inside the passenger compartment 201. When the playback mode is the out-of-vehicle mode, the in-vehicle audio system 100 can play audio outside the vehicle, that is, play audio outside the passenger compartment 201.

[0062] It should be noted that, in addition to the in-vehicle audio system 100 provided in the embodiments of the present application, the vehicle can also be configured with other speaker devices to play audio inside the vehicle. For example, a mid-low frequency speaker can be configured at the door, a high-frequency speaker can be configured at the A-pillar or the door, a full-frequency speaker can be configured at the center console or the ceiling, and a low-frequency speaker can be configured at the headrest or the seat. The present application does not limit this.

[0063] The in-vehicle audio system 100 provided in the present application can also be linked with other systems configured in the vehicle. For example, the in-vehicle audio system 100 can be linked with the ambient light system. When the in-vehicle audio system 100 plays audio, the ambient light can switch the light mode according to the attributes of the audio to achieve the effect of sound and light coordination. For another example, the in-vehicle audio system 100 can also be linked with the suspension system. When the in-vehicle audio system 100 plays audio, the suspension can contract and expand according to the rhythm of the audio, making it more dynamic.

[0064] In this way, the application of the in-vehicle audio system 100 can be extended to diversified scenarios. The following provides an exemplary description of several application scenarios.

[0065] In the scenario of a quiet outdoor camping, the user can set the playback mode to the out-of-vehicle mode, play white noise mixed with bird chirping and running water sounds through the in-vehicle audio system 100, and change the light color tone with the ambient light to create a quiet forest atmosphere.

[0066] In the dynamic outdoor camping scenario, the user can set the playback mode to the outside-vehicle mode, and release strong bass through the vehicle-mounted audio system 100. Together with the up and down floating of the suspension, it creates an open-air music atmosphere.

[0067] In the vehicle driving scenario, the user can set the playback mode to the inside-vehicle mode, and play music inside the vehicle through the vehicle-mounted audio system 100. At this time, during the tuning process, the host 30 can attenuate the low-frequency signal to reduce the radiation of the low-frequency signal to the outside of the vehicle.

[0068] Please also refer to Figure 4 , this application also provides a control method for the vehicle-mounted audio system 100, and the control method can be executed by the host 30.

[0069] The control method includes the following steps.

[0070] S101. Obtain a sound source signal.

[0071] Among them, the sound source signal is the audio information to be played, and the audio information can be from the audio files pre-stored in the system or from the audio files downloaded by the user.

[0072] S102. Process the sound source signal to obtain a first audio signal and a second audio signal.

[0073] Among them, by dividing the sound source signal according to the preset frequency band conditions, the first audio signal and the second audio signal corresponding to different frequency bands can be obtained. The frequency band of the first audio signal corresponds to the first speaker 10, and the frequency band of the second audio signal corresponds to the second speaker 20. Exemplarily, the frequency of the first audio signal is less than or equal to 150 hz, and the frequency of the second audio signal is greater than or equal to 150 hz.

[0074] S103. Send the first audio signal to the first speaker 10 to drive the first speaker 10 to emit sound.

[0075] S104. Send the second audio signal to the second speaker 20 to drive the second speaker 20 to emit sound.

[0076] Among them, the first speaker 10 emits sound in response to the first audio signal, and the second speaker 20 emits sound in response to the second audio signal.

[0077] It should be noted that steps S103 and S104 can be executed simultaneously or in a preset order, and this application does not limit this.

[0078] Please also refer to Figure 5 , in some embodiments, before step S103, the control method further includes the following steps.

[0079] S201. Determine the current playback mode.

[0080] Among them, the playback mode includes an in-vehicle mode and an out-of-vehicle mode. Exemplarily, the user can select the corresponding playback mode on the operation terminal and send a control instruction to the host 30, and the host 30 determines the corresponding playback mode in response to the control instruction of the operation terminal.

[0081] S202. Determine whether the playback mode is the in-vehicle mode. If so, execute step S203; if not, execute step S204.

[0082] S203. Attenuate the first audio signal and execute step S103.

[0083] Among them, in response to the playback mode being the in-vehicle mode, the first audio signal is attenuated to reduce the response of the low-frequency signal radiated by the first speaker 10, reduce the radiation of the low-frequency signal to the outside of the vehicle in the in-vehicle playback scenario, and reduce the leakage of the sound of the speaker.

[0084] S204. Enhance the first audio signal and execute step S103.

[0085] Among them, in response to the playback mode being the out-of-vehicle mode, the first audio signal is enhanced to enhance the response of the low-frequency signal radiated by the first speaker 10, increase the radiation of the low-frequency signal to the outside of the vehicle in the out-of-vehicle playback scenario, and improve the external speaker effect.

[0086] In this way, the in-vehicle audio system 100 can switch different playback modes according to the actual playback environment to meet the audio playback requirements in different scenarios, making it more intelligent and diverse, and improving the user experience.

[0087] This application is not limited to the above specific embodiments. It can be easily understood by those of ordinary skill in the art that without departing from the principle and scope of this application, there are many alternative solutions for the test fixture of this application. The protection scope of this application shall be subject to the content of the claims.

Claims

1. A vehicle audio system, characterized in that, The in-vehicle audio system is applied to a vehicle, which includes a vehicle body. An occupant compartment is provided inside the vehicle body, and an external speaker outlet is provided on the outer side of the vehicle body. The in-vehicle audio system includes a first speaker. The first speaker includes a housing and a diaphragm. The diaphragm is disposed inside the housing, and a rear sound cavity is formed behind the diaphragm. The housing is provided with a guiding hole communicating with the rear sound cavity. Wherein, the first speaker is used to be installed inside the vehicle body, and the front of the diaphragm is used to face the occupant compartment to play audio inside the vehicle; the guiding hole is used to communicate with the external speaker outlet to play audio outside the vehicle.

2. The in-vehicle audio system according to claim 1, characterized in that, The first speaker further includes a guiding tube. The guiding tube is connected to the outer side of the housing. One end of the guiding tube communicates with the guiding hole, and the other end of the guiding tube communicates with the external speaker outlet.

3. The in-vehicle audio system according to claim 1, wherein, The first speaker is installed at the rear side of the vehicle body.

4. The in-vehicle audio system according to any one of claims 1-3, characterized in that The in-vehicle audio system further includes a second speaker. The second speaker is used to be installed on the vehicle body, and the frequency band corresponding to the first speaker is lower than the frequency band corresponding to the second speaker.

5. The in-vehicle audio system according to claim 4, wherein, The first speaker includes one or more combinations of a low-frequency speaker and a subwoofer.

6. The in-vehicle audio system according to claim 4, wherein The second speaker includes one or more combinations of a mid-frequency speaker, a mid-high-frequency speaker, and a full-frequency speaker.

7. The in-vehicle audio system according to claim 4, wherein The second speaker is installed at the front side of the vehicle body and is located outside the occupant compartment.

8. The in-vehicle audio system according to claim 4, wherein, The in-vehicle audio system further includes a host. Both the first speaker and the second speaker are electrically connected to the host. The host is used to perform frequency division on the sound source signal to obtain a first audio signal and a second audio signal corresponding to different frequency bands; the first speaker is used to emit sound in response to the first audio signal, and the second speaker is used to emit sound in response to the second audio signal.

9. A vehicle, characterized in that, The vehicle includes a vehicle body and the in-vehicle audio system according to any one of claims 1 to 8. An occupant compartment is provided inside the vehicle body, and an external speaker outlet is provided on the outer side of the vehicle body. The first speaker is installed inside the vehicle body, and the front of the diaphragm faces the occupant compartment to play audio inside the vehicle; the guiding hole communicates with the external speaker outlet to play audio outside the vehicle.

10. The vehicle according to claim 9, characterized in that, A wheel arch cover is provided at the bottom of the vehicle body, and the external speaker outlet is opened on the wheel arch cover; the first speaker is installed at the rear side of the vehicle body, and the first speaker is provided with a guiding tube. One end of the guiding tube communicates with the guiding hole, and the other end of the guiding tube communicates with the external speaker outlet.

11. A control method for a vehicle audio system, characterized in that, The in-vehicle audio system is applied to a vehicle, which includes a vehicle body. An occupant compartment is provided inside the vehicle body, and an external speaker outlet is provided on the outer side of the vehicle body. The in-vehicle audio system includes a first speaker, a second speaker, and a host. The first speaker and the second speaker are respectively used to play audio of different frequency bands, and the host is used to execute the control method. The first speaker has a diaphragm and a rear sound cavity located behind the diaphragm. The first speaker is provided with a guiding hole communicating with the rear sound cavity; the first speaker is used to be installed inside the vehicle body, and the front of the diaphragm is used to face the occupant compartment to play audio inside the vehicle. The guiding holes are used to communicate with the external sound outlets to play audio outside the vehicle; The control method includes: Obtaining a sound source signal; Processing the sound source signal to obtain a first audio signal and a second audio signal, wherein the frequency band of the first audio signal corresponds to the first speaker, and the frequency band of the second audio signal corresponds to the second speaker; Sending the first audio signal to the first speaker to drive the first speaker to emit sound; Sending the second audio signal to the second speaker to drive the second speaker to emit sound.

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