CN109515311A - A kind of simulation fuel engines engine electronics sound effect system - Google Patents
A kind of simulation fuel engines engine electronics sound effect system Download PDFInfo
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- CN109515311A CN109515311A CN201811336706.XA CN201811336706A CN109515311A CN 109515311 A CN109515311 A CN 109515311A CN 201811336706 A CN201811336706 A CN 201811336706A CN 109515311 A CN109515311 A CN 109515311A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
- B60Q5/005—Arrangement or adaptation of acoustic signal devices automatically actuated
- B60Q5/008—Arrangement or adaptation of acoustic signal devices automatically actuated for signaling silent vehicles, e.g. for warning that a hybrid or electric vehicle is approaching
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Abstract
The present invention discloses a kind of simulation fuel engines engine electronics sound effect system.The system comprises: signal acquisition module, engine status analog module, sound rendering module and sound amplification module；The signal acquisition module, for acquiring engine rotational speed signal percentage signal and engine event status signal；The input terminal of the engine status analog module is connect with the output end of the signal acquisition module, the output end of the engine status analog module is connect with the input terminal of the sound rendering module, and the output end of the sound rendering module is connect with the sound amplification module.Analog simulation true to nature can be carried out to the engine sound effect of vehicle, aircraft, ship using system of the invention.
Description
Technical field
The present invention relates to engine sound effect imitation technology fields, more particularly to a kind of simulation fuel engines engine electricity
Sub- sound effect system.
Background technique
In recent years, in model airplane, auto model, ship waveform field, with Methanol Engine, gasoline engine etc. for fuel power
Engine is gradually replaced motor.Compared to fuel power engine, motor simple, powerful, use with structure
The advantages such as facilitate.In addition, when controlling motor model, manipulator can not pass through sound due to the feature of motor sound peace and quiet
Tone sense is had a greatly reduced quality on model emulation experience effect by come the working condition that judges engine, is not having shock acoustically
Effect.With the development of new energy, electric car, battery-operated motor cycle has stepped into the visual field of people's life.Compared to fuel oil
Power engine, motor machine have the characteristics that sound is quiet, so that vehicle performance person be enabled to be not easy to differentiate whether vehicle has opened
It is dynamic；The crowd of vehicle periphery, which is not easy to discover, has vehicle close, reduces the sound warning function to surrounding population, part
The vehicle that countries and regions have put into effect regulation mandatory requirement electric power needs to be used for the prompt of surrounding pedestrian equipped with related sound effect；It is right
In Some vehicles fan, the sensory experience for sound in vehicle travel process is reduced.
Summary of the invention
The object of the present invention is to provide a kind of simulation fuel engines engine electronics sound effect systems, can be to vehicle, aviation
Device, ship engine sound effect carry out analog simulation true to nature.
To achieve the above object, the present invention provides following schemes:
A kind of simulation fuel engines engine electronics sound effect system, the system comprises: signal acquisition module, engine status
Analog module, sound rendering module and sound amplification module；The signal acquisition module, for acquiring engine rotational speed signal hundred
Divide than signal and engine event status signal；The input terminal of the engine status analog module is defeated with the signal acquisition module
Outlet connection, the output end of the engine status analog module are connect with the input terminal of the sound rendering module, the sound
The output end of synthesis module is connect with the sound amplification module.
Optionally, the signal acquisition module includes signal acquisition unit and signal processing unit, the signal acquisition list
Member is for acquiring throttle amount information, engine speed information and engine condition information, the signal processing unit and the letter
The connection of number acquisition unit, the signal processing unit are used for the throttle amount information, the engine speed information and the hair
Motivational state information carries out processing conversion, obtains tach signal percentage signal and engine event status signal.
Optionally, the engine status analog module includes engine configuration unit, engine status processing unit and gearbox
Unit, the signal processing unit input with the input terminal of the engine status processing unit and the transmission unit respectively
End connection, the output end of the engine configuration unit respectively with the output end and the gearbox of the engine status processing unit
The output end connection of unit, the output end of the engine status processing unit and the transmission unit output end and sound rendering
Module connection.
Optionally, the sound rendering module includes engine audio synthesis unit, audio synthesis configuration unit, source of sound library list
Member and audio generating unit, the output end of the engine status processing unit, the transmission unit output end, the source of sound library
The output end that the output end of unit, the audio synthesize configuration unit connects with the input terminal of the engine audio synthesis unit respectively
It connects, the output end of the engine audio synthesis unit is connect with the input terminal of the audio generating unit, and the audio occurs single
The output end of member is connect with the sound amplification module.
Optionally, the sound amplification module includes audio treatment unit, power amplification unit and sound playing unit, institute
It states audio treatment unit to connect with the output end of the sound rendering module, the output end of the audio treatment unit and the function
The input terminal of rate amplifying unit connects, and the output end of the power amplification unit is connect with the sound playing unit.
Optionally, the signal acquisition unit is used for collection model receiver output signal, motor hall signal, electric vehicle
Handle analog signal, car OBD interface, electric vehicle/automobile CAN-bus, 485 bus of electric vehicle, 2.4G radio-frequency module signal,
BLE module by signal and WIFI module signal.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: the present invention provides a kind of mould
Quasi- fuel engines engine electronics sound effect system, the system comprises: signal acquisition module, engine status analog module, sound
Synthesis module and sound amplification module；The signal acquisition module, for acquiring engine rotational speed signal percentage signal and drawing
Hold up state-event signal；The input terminal of the engine status analog module is connect with the output end of the signal acquisition module, institute
The output end for stating engine status analog module is connect with the input terminal of the sound rendering module, the sound rendering module it is defeated
Outlet is connect with the sound amplification module.The engine sound effect of vehicle, aircraft, ship can be forced by above system
Genuine analog simulation.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that the embodiment of the present invention simulates fuel engines engine electronics sound effect system comprising modules figure；
Fig. 2 is that the embodiment of the present invention simulates fuel engines engine electronics sound effect system comprising modules figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of simulation fuel engines engine electronics sound effect systems, can be to vehicle, aviation
Device, ship engine sound effect carry out analog simulation true to nature.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is that the embodiment of the present invention simulates fuel engines engine electronics sound effect system comprising modules figure.As shown in Figure 1,
A kind of simulation fuel engines engine electronics sound effect system, the system comprises: signal acquisition module 1, engine status simulate mould
Block 2, sound rendering module 3 and sound amplification module 4；The signal acquisition module 1, for acquiring engine rotational speed signal percentage
Than signal and engine event status signal；The input terminal of the engine status analog module 2 is defeated with the signal acquisition module 1
Outlet connection, the output end of the engine status analog module 2 are connect with the input terminal of the sound rendering module 3, the sound
The output end of sound synthesis module 3 is connect with the sound amplification module 4.
In addition, the sound amplification module can be replaced according to scene difference, voice transmission module 5 can be replaced with
With sound broadcasting module 6.Fig. 2 is that the embodiment of the present invention simulates fuel engines engine electronics sound effect system comprising modules figure.Such as
Shown in Fig. 2.Voice transmission module 5 receives the audio signal from sound rendering module, is believed audio by wireless transmitting unit
It number is wirelessly transmitted.The transmission mode of wireless transmission unit includes: FM, WIFI, bluetooth.Sound broadcasting module
6, the wireless audio signal from voice transmission module is received, and play out to sound.Sound broadcasting module is external
System, this system can carry out the broadcasting of engine sound by external all kinds of players.
The signal acquisition module 1 includes signal acquisition unit and signal processing unit, and the signal acquisition unit is used for
Acquire throttle amount information, engine speed information and engine condition information, the signal processing unit and the signal acquisition
Unit connection, the signal processing unit are used for the throttle amount information, the engine speed information and the engine shape
State confidence carries out processing conversion, obtains tach signal percentage signal and engine event status signal.
Signal acquisition unit includes and is not limited to such as lower interface:
Model receiver: being mainly used in mold product, and throttle amount embodies in the form of PWM pulsewidth.
Motor hall signal: the actual speed (RPM) of motor is obtained.
Electric vehicle rotary is analog signal: throttle amount is embodied in the form of voltage value.
Car OBD interface: by OBD interface, the real-time engine speed information of automobile and engine condition information are obtained.
Electric vehicle CAN bus: by CAN bus, the real-time engine speed information and engine shape of electric vehicle are obtained
State information.
485 bus of electric vehicle: by 485 buses, the real-time engine speed information and engine shape of electric vehicle are obtained
State information.
2.4G radio-frequency module: being attached with control terminal by 2.4G radiofrequency signal, and 2.4G rf data packet is parsed, and is obtained
Throttle amount and engine condition information.
BLE module: being attached with control terminal by low-power consumption bluetooth BLE, and BLE agreement is parsed, and obtains throttle amount and hair
Motivational state information.
WIFI module: being attached with control terminal by WIFI, and WIFI agreement is parsed, and obtains throttle amount and engine condition
Information.
Signal processing unit will acquire the throttle amount/real time engine rotary speed information and engine shape from signal acquisition unit
After state information is converted into tach signal percentage and engine event status signal, engine status analog module 2 is sent it to；
The signal acquisition module 1 is acquired signal by signal acquisition unit, and signal is changed through signal processing unit
After calculation processing, signal is passed into the engine status analog module 2.
The engine status analog module 2 receives revolving speed percentage signal and engine event shape from signal acquisition module
State signal is handled in conjunction with the configuration information in engine configuration unit by engine status processing unit and transmission unit
Afterwards, to sound rendering module output engine audio state and engine audio actual speed.
The information that the sound rendering module 3 receives the engine status analog module 2 is sent to the sound amplification mould
Block 4.
The sound amplification module 4 receives the audio signal from sound rendering module, by audio processor unit pair
In audio signal processing, optimization, by power amplification unit to audio signal carry out power amplification after by sound playing unit
The final broadcasting for carrying out sound.
The engine status analog module 2 includes engine configuration unit, engine status processing unit and transmission unit, institute
Signal processing unit is stated to connect with the input terminal of the input terminal of the engine status processing unit and the transmission unit respectively,
The output end of the engine configuration unit respectively with the output end of the engine status processing unit and the transmission unit
Output end connection, the output end of the engine status processing unit and the transmission unit output end and sound rendering module 3
Connection.
Engine status processing unit calculates engine audio according to revolving speed percentage signal and engine event status signal
State.Including: it cuts the engine, engine start, engine operating, engine overload.
Revolving speed percentage is converted into engine audio rotating speed of target by transmission unit.
1) it according to revolving speed percentage signal and the last time real-time revolving speed of engine audio, calculates current gear information and works as
Preceding engine audio rotating speed of target；
2) according to current gear information and the real-time revolving speed of engine audio, in conjunction with the engine sound in engine configuration unit
M curve is imitated, present engine audio moment values are calculated；
3) according to the relationship between engine audio rotating speed of target and the last time real-time revolving speed of engine audio, in conjunction with current hair
The real-time revolving speed of present engine audio is calculated in motivation audio moment values.
Engine configuration unit houses all kinds of parameters that can be adapted to, the speed for engine status processing and transmission unit
Degree calculates.It is wherein main to include but is not limited to:
1) gearbox-gear quantity.For simulating real vehicles shift effect, the engine numbers of gear steps of aircraft is 1.
2) gearbox shifting relevant parameter.Opportunity and shift for setting shift complete the revolving speed of rear engine.It is similar
In the D shelves on vehicle, S grades.
3) M curve of the engine under each gear.Establish actual engine+gearbox model, realistic simulation
The acceleration effect of actual engine.Acceleration is different under different stalls；Under same gear, different engine brief acceleration
It is different.
4) engine overload parameters.The parameter adaptation overloading triggering for engine and exiting.
5) engine start/flame-out parameter.For triggering the parameter adaptation of engine start and state of cutting the engine.
The sound rendering module 3 includes engine audio synthesis unit, audio synthesis configuration unit, source of sound library unit and sound
Frequency generating unit, the output end of the engine status processing unit, the transmission unit output end, the source of sound library unit
The output end that output end, the audio synthesize configuration unit is connect with the input terminal of the engine audio synthesis unit respectively；Institute
The output end for stating engine audio synthesis unit is connect with the input terminal of the audio generating unit, the audio generating unit it is defeated
Outlet is connect with the sound amplification module 4.
Source of sound library unit is used to store the original sample of all kinds of sound: engine audio, includes engine start sample sound, draws
The sample sound under multiple revolving speeds is held up, engine overloads sample sound；
Engine audio synthesis unit carries out the real-time audio data of engine corresponding states according to engine audio state
It generates.1) when engine audio state is engine start, engine audio synthesis unit extracts engine start from source of sound library unit
Sample sound plays out, and generates realaudio data and is sent to audio generating unit；2) engine audio state is engine fortune
When turning, engine audio synthesis unit is extracted from source of sound library unit according to the real-time revolving speed of engine audio and current rotating speed is matched
Several segments sample sound, variation of the engine audio synthesis module according to the real-time revolving speed of engine audio and the revolving speed within a certain period of time
Trend carries out trend simulation to the sample sound under the several segments fixed rotating speed extracted, and response curve calculates, smooth transition
And the algorithm operation of audio fusion, the realaudio data for calculating engine operation are sent to audio generating unit.Work as engine
When velocity-stabilization is constant, engine audio synthesis unit can synthesize engine-operated stable sound effect under current engine speed point.
When engine speed is changed, engine audio synthesis unit can dynamically synthesize the engine sound for following engine speed to change
It imitates, the engine audio in velocity variations has acoustic fidelity, the characteristic that audio variation is linear, resolution ratio is high；3) engine sound
Effect state is when cutting the engine, and audio audio synthesis unit extracts engine idle sample sound from source of sound library unit, according to putting out
The Long-term change trend of fiery state carries out flameout state real-time frequency and sound intensity operation, calculates the real-time audio number of engine misses
According to being sent to audio generating unit；4) when engine condition is overload, engine audio synthesis unit is extracted from source of sound library unit
Engine overload sample sound plays out, and generates engine overload realaudio data and is sent to audio generating unit.
Audio synthesizes configuration unit, contains the configuration parameter for needing to use in sound rendering module.Including but not
It is limited to:
Engine audio volume configuration.It can carry out the independent adjusting of engine sound volume.
Audio generating unit receives the realaudio data from engine audio synthesis unit, and it is single to synthesize configuration in conjunction with audio
The volume of each sound effect in member carries out algorithm fusion to audio data, calculates realaudio data, and produce by hardware interface
Raw digital audio and video signals or analog audio signal are sent to sound amplification module.
The sound amplification module 4 includes audio treatment unit, power amplification unit and sound playing unit, the audio
Processing unit is connect with the output end of the sound rendering module, the output end of the audio treatment unit and the power amplification
The input terminal of unit connects, and the output end of the power amplification unit is connect with the sound playing unit.
Audio treatment unit receives the digital-to-analog audio signal from sound rendering module, increases to voice signal
Audio signal is passed into power amplification unit after strong.It include: wherein high pitch enhancing, middle pitch enhancing, bass to the enhancing of audio
Enhancing, surrounding.
Power amplification unit is sent to sound after the low-power audio signal from audio treatment unit is carried out power amplification
Sound broadcast unit.
Sound playing unit plays out the audio signal with power from power amplification unit.Sound playing unit
Include loudspeaker and speaker.According to different application scenarios, the loudspeaker of different size parameter can be selected and carry out the sound of corresponding scene
Case cavity design.
The present invention has the advantage that
Advantage one: engine sound is very true to nature.
Transmission unit and engine audio synthesis unit enable sound effect maximumlly simulate the Operation Conditions of actual engine.
Engine audio synthesis unit enables sound fusion be very natural, is true to nature.Engine audio synthesis unit is according to engine sound
It imitates real-time revolving speed to extract from source of sound library unit and the matched several segments sample sound of current rotating speed, and real-time according to engine audio
The variation tendency of revolving speed and the revolving speed within a certain period of time carries out trend simulation, response curve meter to the sample sound extracted
It calculates, the algorithm operation of smooth transition and audio fusion calculates the realaudio data of engine operation.Pass through the algorithm engine
Audio synthesis unit can calculate the audio true to nature of the engine under any engine speed point.When engine speed changes,
The sound effect of engine can smooth, natural therewith, be realistically changed, and acoustic resolution is high and very linear in change procedure.
When transmission unit maximumlly simulates the variation of throttle amount, the variation of engine speed.Gearbox is calculated in speed
The concept of M curve in real engine has been used in the process, and engine has different torque under different rotating speeds, different
Gearbox gear is than different under gear, so the acceleration of engine is different under any point speed of different stalls, speed change
Box unit, than relationship, calculates engine acceleration under current gear and revolving speed according to M curve and gear teeth in real time, thus most true
The process of engine speed variation is simulated on the spot, and cooperation engine audio synthesis unit can generate engine sound very true to nature
Effect is especially true to nature especially during velocity variations.
Current existing product and technology mostly use greatly two class modes to carry out engine sound simulation: 1) single hop engine sound
Frequency variation method carries out frequency variation using the sound of engine idle, to simulate the sound of engine under every speed, this method revolving speed
High resolution, sound good linearity, audio is preferable under lower-speed state, but sound almost loses when revolving speed reaches high speed
Very；2) multistage engine sound plays method, and this method prestores sound of the several segments engine under multiple revolving speeds in advance, and (revolving speed is in ladder
Shape is incremented by), according to current engine speed when operation, chooses the immediate one section of engine sound of revolving speed and play out, this method
The audio that the fixed several revolving speeds prestored can only be played, when speed slightly changes or audio is unchanged (remains same
One revolving speed audio plays out) or audio can change violent (switch between two revolving speed audios and play out), work as speed
Degree quickly variation when, it is low that audio variation shows resolution ratio, almost without linear, from the feeling acoustically having some setbacks very much to people.
Our method has surmounted such methods on the dynamic effect in engine effects especially rotation speed change completely, in entire engine
In the interval range of velocity variations, engine audio can show that true to nature, resolution ratio is high, speed-audio good linearity, and variation is thin
Greasy feature.
Advantage two: sound quality is good.
The source of sound sample of source of sound library unit storage is the sample sound that special instrument is recorded.Source of sound uses the sound of high-fidelity
Frequency data format, data storage maximumlly promote the quality of source of sound without compression.
Using the audio treatment unit and power amplification unit of profession, guarantee is provided for the quality of audio, and in this base
Increase the personalization of audio feature on plinth.
The operatic tunes of well-chosen loudspeaker and targeted design in sound playing unit ensure that the sound quality and sound of sound
Amount.
Transmission and amplification of this system from the source of sound to audio signal, then the broadcasting of sound is arrived, maximumlly restore
Each details in sound, ensure that the quality and reduction degree of sound.
Advantage three: efficiency of algorithm is high, low in cost.
Due to efficiency of algorithm height, without quoting third party library, so dominant frequency of this algorithm for processor, RAM and FLASH
Requirement it is very low, do not depend on any operating system, may operate in ARM-CORTEX-M0 be kernel microcontroller
In, the processor that the present invention is supported not merely is confined to the processor of ARM-CORTEX-M0, and performance reaches this kind of processor water
Flat or horizontal higher than this kind of processor can be applicable in.And the advantages of being synthesized due to audio data by algorithm, it is only necessary to
Want minimal amount of original audio data that can really restore the sound of engine, the flash memory of sound storage only needs 2MB FLASH.
Efficient efficiency of algorithm brings extremely cheap cost.
The application of presently the most typical engine sound simulation is all kinds of car race games, the engine sound mould in this kind of game
Quasi- to be required to a large amount of cpu resource and RAM resource, due to there is huge audio to synthesize code library, the capacity of general procedure is at least
Up to a hundred million, and highly dependent upon the operating system of operation, so can not be applied in the microcontroller of low cost.
Advantage four: usage scenario abundant is supported.
Signal acquisition module can support all kinds of interfaces, and collected signal is converted into revolving speed percentage letter by final unification
Number and each state-event control signal supply algorithm handled, so this system can be applied to various usage scenarios.Its
In include: model vehicle, the model of an airplane, model ship, battery-operated motor cycle, electric vehicle puts outside electric car or automotive interior sound
The scenes such as sound simulation.
The replaceable and customization of sound output module provides support to usage scenario abundant.Field is used according to different
The power amplification unit of different capacity, loudspeaker and the operatic tunes can be used in scape.Meanwhile if there is loudspeaker (such as vapour of exterior
Vehicle sound equipment, Bluetooth audio device etc.), sound amplification module can also be replaced with to voice transmission module, by audio signal by it is wireless/
Wired mode is sent to external loudspeaker.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand system and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (6)
1. a kind of simulation fuel engines engine electronics sound effect system, which is characterized in that the system comprises: signal acquisition mould
Block, engine status analog module, sound rendering module and sound amplification module；The signal acquisition module is started for acquiring
Machine tach signal percentage signal and engine event status signal；The input terminal and the signal of the engine status analog module
The output end of acquisition module connects, and the input terminal of the output end of the engine status analog module and the sound rendering module connects
It connects, the output end of the sound rendering module is connect with the sound amplification module.
2. simulation fuel engines engine electronics sound effect system according to claim 1, which is characterized in that the signal is adopted
Collection module includes signal acquisition unit and signal processing unit, and the signal acquisition unit is for acquiring throttle amount information, starting
Machine rotary speed information and engine condition information, the signal processing unit are connect with the signal acquisition unit, at the signal
Reason unit carries out processing conversion for the throttle amount information, the engine speed information and the engine condition information,
Obtain tach signal percentage signal and engine event status signal.
3. simulation fuel engines engine electronics sound effect system according to claim 2, which is characterized in that the engine shape
State analog module includes engine configuration unit, engine status processing unit and transmission unit, the signal processing unit difference
It is connect with the input terminal of the input terminal of the engine status processing unit and the transmission unit, the engine configuration unit
Output end is connect with the output end of the output end of the engine status processing unit and the transmission unit respectively, the engine
The output end of state processing unit and the transmission unit output end are connect with sound rendering module.
4. simulation fuel engines engine electronics sound effect system according to claim 3, which is characterized in that the sound closes
It include engine audio synthesis unit, audio synthesis configuration unit, source of sound library unit and audio generating unit, the engine at module
The output end of state processing unit, the transmission unit output end, the output end of the source of sound library unit, audio synthesis
The output end of configuration unit is connect with the input terminal of the engine audio synthesis unit respectively, the engine audio synthesis unit
Output end is connect with the input terminal of the audio generating unit, and the output end and the sound of the audio generating unit amplify mould
Block connection.
5. simulation fuel engines engine electronics sound effect system according to claim 4, which is characterized in that the sound is put
Big module includes audio treatment unit, power amplification unit and sound playing unit, the audio treatment unit and the sound
The output end of synthesis module connects, and the output end of the audio treatment unit is connect with the input terminal of the power amplification unit,
The output end of the power amplification unit is connect with the sound playing unit.
6. simulation fuel engines engine electronics sound effect system according to claim 2, which is characterized in that the signal is adopted
Collect unit for collection model receiver output signal, motor hall signal, electric vehicle rotary analog signal, car OBD interface,
Electric vehicle/automobile CAN-bus, 485 bus of electric vehicle, 2.4G radio-frequency module signal, BLE module by signal and WIFI module signal.
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| CN201811336706.XA CN109515311B (en) | 2018-11-12 | 2018-11-12 | System for simulating electronic sound effect of engine of fuel engine |
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| CN201811336706.XA CN109515311B (en) | 2018-11-12 | 2018-11-12 | System for simulating electronic sound effect of engine of fuel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111147979A (en) * | 2020-01-07 | 2020-05-12 | 天津依德声音技术有限公司 | Bluetooth sound circuit with engine sound wave simulation function |
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