CN111147979A - Bluetooth sound circuit with engine sound wave simulation function - Google Patents
Bluetooth sound circuit with engine sound wave simulation function Download PDFInfo
- Publication number
- CN111147979A CN111147979A CN202010014029.0A CN202010014029A CN111147979A CN 111147979 A CN111147979 A CN 111147979A CN 202010014029 A CN202010014029 A CN 202010014029A CN 111147979 A CN111147979 A CN 111147979A
- Authority
- CN
- China
- Prior art keywords
- bluetooth
- audio
- circuit
- module
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004088 simulation Methods 0.000 title claims abstract description 38
- 230000005236 sound signal Effects 0.000 claims abstract description 42
- 238000004891 communication Methods 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 27
- 230000003321 amplification Effects 0.000 claims abstract description 12
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 230000003993 interaction Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000004422 calculation algorithm Methods 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims 3
- 238000013461 design Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Medical Informatics (AREA)
- Psychiatry (AREA)
- Psychology (AREA)
- Social Psychology (AREA)
- Educational Technology (AREA)
- Developmental Disabilities (AREA)
- Biophysics (AREA)
- Child & Adolescent Psychology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hospice & Palliative Care (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
The invention relates to the technical field of sound design of electronic products, in particular to a Bluetooth sound circuit design with an engine sound wave simulation function, which comprises a Bluetooth sound box and an engine simulation sound box, wherein the Bluetooth sound box consists of a Bluetooth sound box body and a Bluetooth sound box control circuit, an audio signal amplification and processing module is arranged on the Bluetooth sound box control circuit, a loudspeaker module is arranged on the right side of the signal amplification and processing module, an engine sound wave simulation circuit module is arranged on the upper side of the loudspeaker module, and a Bluetooth communication and audio playing circuit module is arranged on the upper side of the engine sound wave simulation circuit module. The invention can realize the function of simulating the engine sound waves on the basis of realizing the playing of common music by the sound box product.
Description
Technical Field
The invention relates to the technical field of sound design of electronic products, in particular to a Bluetooth sound circuit with an engine sound wave simulation function.
Background
In the aspect of psychology, the feeling that the personal spirit is completely put into certain activities is defined as the heart flow, when the heart flow is generated, high excitement and sense of fullness are generated, the feeling that the whole body and mind is put into certain events and the physical and mental resonance of the real world is forgotten is immersion, and the so-called immersion experience design is that the non-real objects, equipment and scenes are used as carriers to immerse a user in a manner of fitting the story performance which is even beyond the life experience of the user by the aid of scene construction, matching with scientific and technological means such as holographic projection, sound effect simulation, AR or VR and the like.
Immersive design is a design goal of a present class of electronic products. For example, sound effect simulation is applied to various devices by simulating various sounds so as to bring certain experience to users.
Disclosure of Invention
The present invention is directed to a bluetooth audio circuit with engine sound wave simulation function and a control method thereof, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a bluetooth sound circuit with engine sound wave analog function, includes bluetooth speaker and engine analog sound box, bluetooth speaker comprises bluetooth speaker box and bluetooth speaker control circuit, the last audio signal that is equipped with of bluetooth speaker control circuit is enlargied and processing module, signal amplification and processing module right side are equipped with speaker module, speaker module upside is equipped with engine sound wave analog circuit module, engine sound wave analog circuit module upside is equipped with bluetooth communication and audio playback circuit module.
Further: the Bluetooth communication and audio playing circuit module is in two-way connection with the engine sound wave simulation circuit module through a communication circuit, the engine sound wave simulation circuit module is connected to the Bluetooth communication and audio playing circuit module through an audio signal circuit, the Bluetooth communication and audio playing circuit module outputs control and audio signals and is connected to an audio signal amplification and processing module, and the audio signal amplification and processing module outputs audio signals and is connected to the loudspeaker module.
Further: the engine simulation sound box comprises a CAN driving circuit, a Bluetooth communication and audio playing circuit module, an audio signal amplifying and processing module and a loudspeaker module.
Further: the CAN drive circuit is connected with an external circuit in a two-way mode through a CAN bus, and the CAN drive circuit is connected with the Bluetooth communication and audio playing circuit module in a two-way mode through digital communication.
Further: the Bluetooth circuit comprises an audio Bluetooth U1, the audio Bluetooth U1 is connected with an indication module, the audio Bluetooth U1 inputs a connection mode area, the audio Bluetooth U1 outputs and is connected with a power management U6, an audio signal and audio Bluetooth U1 exchange information, a vehicle state signal and data transmission Bluetooth U3 exchange information, and the data transmission Bluetooth U3 inputs and is connected with the audio Bluetooth U1;
I/O1 interface connection number on the audio frequency bluetooth U1 passes the I/O interface of bluetooth U3, I/O2 interface, I/O3 interface connection engine sound effect processor U2's I/0 interface on the audio frequency bluetooth U1, engine sound effect processor U2 passes through SCI and number and passes bluetooth U3 both way junction and pass through DAC and connect audio frequency bluetooth U1, engine sound effect processor U2 and FLASHU5 pass through SPI both way junction, audio frequency bluetooth U1 and FLASHU4 pass through SPI both way junction, two sound effect amplification modules are connected simultaneously to audio frequency bluetooth U1, a pair of power amplifier is all connected to every sound effect amplification module.
Further: a work flow obtained by designing a Bluetooth sound circuit with an engine sound wave simulation function at least comprises the following steps:
the process can switch two functions of Bluetooth music playing and engine sound wave simulation;
when the Bluetooth sound box plays music, the Bluetooth communication and audio playing circuit module receives Bluetooth music information, outputs audio and control signals to the audio signal amplifying and processing module after processing, and outputs the processed and amplified information to the loudspeaker module to play the music;
when the Bluetooth sound box plays the engine sound wave simulation sound effect, the Bluetooth communication and audio playing circuit module receives the operation of the Bluetooth engine and relevant information, the processed information is output to the engine sound wave simulation circuit module through the communication circuit, the engine sound wave simulation algorithm is used for realizing the audio signal simulating the engine sound wave, the audio signal is output to the Bluetooth communication and audio playing circuit module through the audio signal circuit, the processed information is output to the rear-level audio signal amplifying and processing module, the information is processed, amplified and then output to the loudspeaker module, and the engine sound wave is played.
The invention has the advantages that: the design is based on the design of the immersion sense of the user of the engine sound wave simulation, so that the sound box product can further realize the function of the engine sound wave simulation on the basis of realizing the playing of common music. The sound box can be applied to various vehicles with Bluetooth communication and equipment with engine simulation products, such as a kart, a balance car, a scooter, an electric motorcycle, an electric automobile, a hybrid automobile, a fuel automobile and the like, so that the sound box has the simulation effect of engine sound waves, improves the sound experience feeling of people around in a user and application use scene, and plays the effects of warning, joyful, engine sound effect immersion and the like.
Drawings
Fig. 1 is a block diagram of a bluetooth sound box according to the present invention;
FIG. 2 is a structural diagram of a Bluetooth speaker control circuit according to the present invention;
FIG. 3 is a block diagram of an engine-simulated sound box according to the present invention;
fig. 4 is a circuit diagram of the bluetooth in the present invention.
In the figure: 1. a Bluetooth sound box; 10. a Bluetooth sound box control circuit; 100. an indication module; 101. a mode region; 102. power management U6; 103. audio bluetooth U1; 104. data transmission Bluetooth U3; 105. an audio signal; 106. a vehicle state signal; 107. an engine sound effect processor U2; 108. FLASHU 5; 109. FLASHU 4; 110. a sound effect amplifying module; 111. amplifying power; 11. a Bluetooth sound box body; 2. the Bluetooth communication and audio playing circuit module; 3. an engine sound wave simulation circuit module; 4. the audio signal amplifying and processing module; 5. a speaker module; 6. the engine simulates a sound box; 7. a CAN driving circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1-4, the present invention provides a technical solution:
the utility model provides a bluetooth sound circuit with engine sound wave analog function, including bluetooth speaker 1 and engine analog speaker 6, bluetooth speaker 1 comprises bluetooth speaker box 11 and bluetooth speaker control circuit 10, it enlargies and processing module 4 to be equipped with audio signal on the bluetooth speaker control circuit 10, 4 right sides of signal amplification and processing module are equipped with speaker module 5, 5 upsides of speaker module are equipped with engine sound wave analog circuit module 3, 3 upsides of engine sound wave analog circuit module are equipped with bluetooth communication and audio playback circuit module 2.
The Bluetooth communication and audio playing circuit module 2 is connected with the engine sound wave simulation circuit module 3 in a two-way mode through a communication circuit, the engine sound wave simulation circuit module 3 is connected to the Bluetooth communication and audio playing circuit module 2 through an audio signal circuit, the Bluetooth communication and audio playing circuit module 2 outputs control and audio signals and is connected to an audio signal amplifying and processing module 4, and the audio signal amplifying and processing module 4 outputs audio signals and is connected to a loudspeaker module 5.
The engine simulation sound box 6 comprises a CAN drive circuit 7, a Bluetooth communication and audio playing circuit module 2, an audio signal amplifying and processing module 4 and a loudspeaker module 5.
The CAN drive circuit 7 is connected with an external circuit in two directions through a CAN bus, and the CAN drive circuit 7 is connected with the Bluetooth communication and audio playing circuit module 2 in two directions through digital communication.
The Bluetooth circuit comprises an audio Bluetooth U1103, an audio Bluetooth U1103 connection indicating module 100, an audio Bluetooth U1103 input connection mode area 101, an audio Bluetooth U1103 output connection power management U6102, an audio signal 105 and the audio Bluetooth U1103 interaction information, a vehicle state signal 106 and a data transmission Bluetooth U3104 interaction information, and a data transmission Bluetooth U3104 input connection audio Bluetooth U1103;
an I/O1 interface on the audio Bluetooth U1103 is connected with an I/O interface of a data transmission Bluetooth U3104, an I/O2 interface and an I/O3 interface on the audio Bluetooth U1103 are connected with an I/0 interface of an engine sound effect processor U2107, the engine sound effect processor U2107 is bidirectionally connected with the data transmission Bluetooth U3104 through SCI and is connected with the audio Bluetooth U1103 through a DAC, the engine sound effect processor U2107 is bidirectionally connected with a FLASHU5108 through SPI, the audio Bluetooth U1103 and the FLASHU4109 are bidirectionally connected through SPI, the audio Bluetooth U1103 is simultaneously connected with two sound effect amplification modules 110, and each sound amplification module 110 is connected with a pair of power amplifiers 111.
A work flow obtained by designing a Bluetooth sound circuit with an engine sound wave simulation function at least comprises the following steps:
the process can switch two functions of Bluetooth music playing and engine sound wave simulation;
when the Bluetooth sound box 1 plays music, the Bluetooth communication and audio playing circuit module 2 receives Bluetooth music information, outputs audio and control signals to the audio signal amplifying and processing module 4 after processing, and outputs the processed and amplified information to the loudspeaker module 5 to play the music;
when the bluetooth sound box 1 plays the engine sound wave simulation sound effect, the bluetooth communication and audio playing circuit module 2 receives the operation of the bluetooth engine and the related information, the processed information is output to the engine sound wave simulation circuit module 3 through the communication circuit, the audio signal for simulating the engine sound wave is realized through the engine sound wave simulation algorithm, the audio signal is output to the bluetooth communication and audio playing circuit module 2 through the audio signal circuit, the processed information is output to the rear-level audio signal amplifying and processing module 4, the information is processed and amplified, and the amplified information is output to the loudspeaker module 5 to play the engine sound wave.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a bluetooth sound circuit with engine sound wave analog function, includes bluetooth speaker (1) and engine analog audio amplifier (6), its characterized in that: bluetooth sound box (1) comprises Bluetooth sound box (11) and Bluetooth sound box control circuit (10), be equipped with audio signal on Bluetooth sound box control circuit (10) and enlarge and processing module (4), signal amplification and processing module (4) right side are equipped with speaker module (5), speaker module (5) upside is equipped with engine sound wave analog circuit module (3), engine sound wave analog circuit module (3) upside is equipped with bluetooth communication and audio playback circuit module (2).
2. The bluetooth sound circuit with engine sound wave simulation function according to claim 1, wherein: bluetooth communication and audio playback circuit module (2) are through communication circuit and engine sound wave analog circuit module (3) both way junction, engine sound wave analog circuit module (3) are connected to Bluetooth communication and audio playback circuit module (2) through audio signal circuit, bluetooth communication and audio playback circuit module (2) output control and audio signal are connected to audio signal and enlarge and processing module (4), audio signal enlargies and processing module (4) output audio signal and is connected to speaker module (5).
3. The bluetooth sound circuit with engine sound wave simulation function according to claim 1, wherein: the engine simulation sound box (6) comprises a CAN drive circuit (7), a Bluetooth communication and audio playing circuit module (2), an audio signal amplifying and processing module (4) and a loudspeaker module (5).
4. The bluetooth sound circuit with engine sound wave simulation function according to claim 3, wherein: CAN drive circuit (7) pass through CAN bus both way junction external circuit, CAN drive circuit (7) pass through digital communication both way junction bluetooth communication and audio playback circuit module (2).
5. The bluetooth sound circuit with engine sound wave simulation function according to claim 1, wherein: the Bluetooth circuit comprises an audio Bluetooth U1 (103), an audio Bluetooth U1 (103) connection indication module (100), an audio Bluetooth U1 (103) input connection mode area (101), an audio Bluetooth U1 (103) output connection power management U6 (102), an audio signal (105) and audio Bluetooth U1 (103) interaction information, a vehicle state signal (106) and a data transmission Bluetooth U3 (104) interaction information, and an audio Bluetooth U1 (103) input connection through the data transmission Bluetooth U3 (104);
the I/O1 interface on the audio Bluetooth U1 (103) is connected with the I/O interface of a data transmission Bluetooth U3 (104), the I/O2 interface and the I/O3 interface on the audio Bluetooth U1 (103) are connected with the I/0 interface of an engine sound processor U2 (107), the engine sound processor U2 (107) is connected with an audio Bluetooth U1 (103) in a bidirectional mode through SCI and the data transmission Bluetooth U3 (104) and through DAC, the engine sound processor U2 (107) and a FLASHU5 (108) are connected in a bidirectional mode through SPI, the audio Bluetooth U1 (103) and the FLASHU4 (109) are connected in a bidirectional mode through SPI, the audio Bluetooth U1 (103) is connected with two sound amplifying modules (110) at the same time, and each sound amplifying module (110) is connected with a pair of power amplifiers (111).
6. The work flow obtained by the bluetooth sound circuit with the engine sound wave simulation function according to claim 1, is characterized in that: the process at least comprises the following steps:
the process can switch two functions of Bluetooth music playing and engine sound wave simulation;
when the Bluetooth sound box (1) plays music, the Bluetooth communication and audio playing circuit module (2) receives Bluetooth music information, outputs audio and control signals to the audio signal amplifying and processing module (4) after processing, and outputs the processed and amplified information to the loudspeaker module (5) to play the music;
when the Bluetooth sound box (1) plays an engine sound wave simulation sound effect, the Bluetooth communication and audio playing circuit module (2) receives the operation of the Bluetooth engine and relevant information, the processed information is output to the engine sound wave simulation circuit module (3) through the communication circuit, the engine sound wave simulation algorithm is used for realizing the audio signal simulating the engine sound wave, the audio signal is output to the Bluetooth communication and audio playing circuit module (2) through the audio signal circuit, the processed information is output to the rear-stage audio signal amplification and processing module (4), the information is processed and amplified, and the amplified information is output to the loudspeaker module (5) to realize the playing of the engine sound wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014029.0A CN111147979A (en) | 2020-01-07 | 2020-01-07 | Bluetooth sound circuit with engine sound wave simulation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014029.0A CN111147979A (en) | 2020-01-07 | 2020-01-07 | Bluetooth sound circuit with engine sound wave simulation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111147979A true CN111147979A (en) | 2020-05-12 |
Family
ID=70523963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010014029.0A Pending CN111147979A (en) | 2020-01-07 | 2020-01-07 | Bluetooth sound circuit with engine sound wave simulation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111147979A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862513A (en) * | 2012-09-29 | 2013-01-09 | 苏州新昌科技有限公司 | System and method for simulating running sound of motor vehicle |
| CN204029385U (en) * | 2014-07-15 | 2014-12-17 | 杭州罗孚音响有限公司 | The double mode music playing system of WIFI+ bluetooth |
| CN107097718A (en) * | 2017-06-15 | 2017-08-29 | 北京普瑞众创科技有限公司 | Active speech synthesizing device and the vehicles |
| CN109274385A (en) * | 2018-08-01 | 2019-01-25 | 安徽森力汽车电子有限公司 | A kind of vehicle mounted multimedia radio devices of integrated simulation engine sound |
| CN109515311A (en) * | 2018-11-12 | 2019-03-26 | 宁波微行航空科技有限公司 | A kind of simulation fuel engines engine electronics sound effect system |
| CN109532654A (en) * | 2018-11-14 | 2019-03-29 | 上海迪彼电子科技有限公司 | A kind of engine voice and goers outside vehicle caution sound integrated control system |
-
2020
- 2020-01-07 CN CN202010014029.0A patent/CN111147979A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862513A (en) * | 2012-09-29 | 2013-01-09 | 苏州新昌科技有限公司 | System and method for simulating running sound of motor vehicle |
| CN204029385U (en) * | 2014-07-15 | 2014-12-17 | 杭州罗孚音响有限公司 | The double mode music playing system of WIFI+ bluetooth |
| CN107097718A (en) * | 2017-06-15 | 2017-08-29 | 北京普瑞众创科技有限公司 | Active speech synthesizing device and the vehicles |
| CN109274385A (en) * | 2018-08-01 | 2019-01-25 | 安徽森力汽车电子有限公司 | A kind of vehicle mounted multimedia radio devices of integrated simulation engine sound |
| CN109515311A (en) * | 2018-11-12 | 2019-03-26 | 宁波微行航空科技有限公司 | A kind of simulation fuel engines engine electronics sound effect system |
| CN109532654A (en) * | 2018-11-14 | 2019-03-29 | 上海迪彼电子科技有限公司 | A kind of engine voice and goers outside vehicle caution sound integrated control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101656901B (en) | Noise-canceling system | |
| US20090238372A1 (en) | Vertically or horizontally placeable combinative array speaker | |
| CN101609667B (en) | Method for realizing karaoke function in PMP player | |
| US20160133245A1 (en) | Sound Processing Method And Terminal Device | |
| CN105308677A (en) | Video gaming system with ultrasonic speakers | |
| JP2012252240A (en) | Replay apparatus, signal processing apparatus, and signal processing method | |
| CN102474698A (en) | M-S stereo reproduction at a device | |
| CN112911065B (en) | Audio playing method and device for terminal, electronic equipment and storage medium | |
| US11915680B2 (en) | Method and system for active noise control | |
| CN110223665A (en) | Extremely-low-noise karaoke system for vehicle-mounted Wi-Fi communication and data interaction method thereof | |
| CN109532654A (en) | A kind of engine voice and goers outside vehicle caution sound integrated control system | |
| CN206195901U (en) | Music system of playing based on intelligent terminal | |
| CN111147979A (en) | Bluetooth sound circuit with engine sound wave simulation function | |
| US5543579A (en) | Effector | |
| CN101710454A (en) | Radiation protective digital antenatal training belt | |
| JPH05300597A (en) | Video-coupler sound image localization device | |
| CN108093334A (en) | A kind of intelligent sound | |
| CN2938669Y (en) | Bass processing circuit | |
| CN105307086A (en) | Method and system for simulating surround sound for two-channel headset | |
| CN103744335B (en) | A kind of embedded digital sound-effect processing equipment | |
| CN201967107U (en) | Vibration system of stereo headphone | |
| US20050041814A1 (en) | Method and related apparatus for stereo vocal cancellation | |
| JPH01119821A (en) | Voice registering and reproducing device | |
| TW202107447A (en) | A helmet and a method for playing desired sound in the same | |
| CN218352658U (en) | Power amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200512 |