CN106210987A - A kind of mobile terminal, noise reducing apparatus and noise-reduction method thereof - Google Patents
A kind of mobile terminal, noise reducing apparatus and noise-reduction method thereof Download PDFInfo
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- CN106210987A CN106210987A CN201610618994.2A CN201610618994A CN106210987A CN 106210987 A CN106210987 A CN 106210987A CN 201610618994 A CN201610618994 A CN 201610618994A CN 106210987 A CN106210987 A CN 106210987A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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Abstract
The invention discloses a kind of mobile terminal, including the first short-range wireless communication module, for receiving the environmental noise signal that noise detection device is sent by the second short-range wireless communication module；De-noising signal generation module, for generating audio defeat signal according to described environmental noise signal；Audio playing module, is used for playing described audio defeat signal.Also disclosing a kind of noise reducing apparatus, including noise detection device and mobile terminal, wherein, described noise audio detection device includes audio sensing modules, is used for detecting environmental noise and being transferred to described second short-range wireless communication module；Described second short-range wireless communication module, for being sent to described mobile terminal by described environmental noise signal.The invention also discloses corresponding noise-reduction method.The scheme using the present invention to provide, can alleviate or offset the noise near mobile terminal, play the effect of active noise reduction.
Description
Technical Field
The invention relates to the field of mobile terminals, in particular to a mobile terminal, noise reduction equipment and a noise reduction method thereof.
Background
Three noise reduction measures are generally used to reduce noise, namely: these measures are also passive in nature, with noise reduction at the sound source, noise reduction during propagation, and noise reduction at the human ear. In order to actively cancel Noise, the technology of "active Noise cancellation" has appeared, namely anc (active Noise cancellation) active Noise cancellation, and its principle is: since all sounds are composed of a certain frequency spectrum, if a sound can be found whose frequency spectrum is identical to the noise to be eliminated, but with exactly opposite phases (180 ° apart), the noise can be neutralized or even completely cancelled, thereby achieving the noise reduction effect. The key to ANC is how to get a sound that cancels the noise. The commonly adopted method is to start from the noise source itself and try to reverse the phase of the original noise through an electronic circuit.
In the existing mobile terminal, ANC technology is also used to reduce noise, but most of them add an independent hardware module on the earphone, so as to perform active noise reduction operation on the ambient noise when talking through the earphone.
Disclosure of Invention
The invention mainly aims to provide a mobile terminal, noise reduction equipment and a noise reduction method thereof, and aims to solve the problem of how to eliminate ambient noise around a user.
In order to achieve the above object, the present invention provides a mobile terminal, which includes a first short-range wireless communication module, a noise reduction signal generation module, and an audio playing module;
the first short-range wireless communication module is used for receiving an environmental noise signal sent by the noise detection device through the second short-range wireless communication module;
the noise reduction signal generation module is used for generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal;
and the audio playing module is used for playing the audio noise reduction signal.
Optionally, the audio playing module is configured to directly play the audio noise reduction signal; or,
playing the audio noise reduction signal through an external device, wherein the external device is connected to the mobile terminal in a wireless or wired mode.
The invention also provides noise reduction equipment, which comprises a mobile terminal and a noise detection device, wherein the mobile terminal comprises a first short-range wireless communication module, a noise reduction signal generation module and an audio playing module, and the noise detection device comprises an audio sensing module and a second short-range wireless communication module;
the audio sensing module is used for detecting environmental noise and transmitting the environmental noise to the second short-range wireless communication module;
the second short-range wireless communication module is used for sending the environment noise signal to the mobile terminal;
the first short-range wireless communication module is used for receiving the environmental noise signal sent by the second short-range wireless communication module;
the noise reduction signal generation module is used for generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal;
and the audio playing module is used for playing the audio noise reduction signal.
Optionally, wherein the audio sensing module comprises a microphone or microphone.
Optionally, wherein the noise detection device further comprises an adsorption part for fixing the noise detection device.
The invention also provides a noise reduction method, which is suitable for the mobile terminal and comprises the following steps:
detecting the transmitted environmental noise signal by a short-range wireless communication receiving noise detection device;
and generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal, and playing the audio noise reduction signal through an audio playing module.
Optionally, wherein the audio playing module directly plays the audio noise reduction signal; or,
playing the audio noise reduction signal through an external device, wherein the external device is connected to the mobile terminal in a wireless or wired mode.
The invention also provides a noise reduction method, which comprises the following steps:
the noise detection device detects environmental noise and sends the environmental noise signal to the mobile terminal through short-range wireless communication;
the mobile terminal receives the ambient noise signal through short-range wireless communication; and generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal, and playing the audio noise reduction signal through an audio playing module.
Optionally, wherein the noise detection device comprises a microphone or microphone.
Optionally, the method further comprises: the noise detection device is fixed by an adsorption part.
According to the technical scheme provided by the invention, the noise detection device can be utilized to detect the environmental noise and wirelessly send the detected environmental noise signal to the mobile terminal, the mobile terminal generates the audio noise reduction signal with the phase opposite to that of the noise signal according to the received noise signal, and the audio noise reduction signal is played through the audio playing module, so that the noise near the mobile terminal is reduced or offset, and the active noise reduction effect is achieved.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present invention;
fig. 2 is a schematic structural diagram of a noise reduction module of a mobile terminal according to a first embodiment of the present invention;
fig. 3 is a schematic block diagram of a noise reduction apparatus according to a second embodiment of the present invention;
fig. 4 is a schematic block diagram of a noise reduction apparatus according to a third embodiment of the present invention;
fig. 5 is a schematic block diagram of a noise reduction apparatus according to a fourth embodiment of the present invention;
fig. 6 is a flowchart illustrating a mobile terminal side noise reduction method according to a first embodiment of the present invention;
FIG. 7 is a flowchart illustrating a denoising method according to a second embodiment of the present invention;
FIGS. 8a-8c are schematic flow charts illustrating a noise detection and reduction method according to an exemplary embodiment of the present invention;
FIG. 9 is a first application scenario diagram of the present invention;
fig. 10 is a diagram of an application scenario of the embodiment of the present invention.
In fig. 9-10, 1a is a window glass, 2a is a noise detecting device, 3a is a wired horn/sound box (the dotted line indicates optional), and 3b is a wireless horn/sound box.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solution of the present invention will be described in more detail with reference to the accompanying drawings and examples.
It should be noted that, if not conflicting, the embodiments of the present invention and the features of the embodiments may be combined with each other within the scope of protection of the present invention. Additionally, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", or "unit" used to denote elements are used only for the convenience of description of the present invention, and have no specific meaning in themselves. Thus, "module" and "module" may be used in a mixture.
The mobile terminal may be implemented in various forms. For example, a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a PDA (personal digital assistant), a PAD (tablet), a PMP (portable multimedia player), and the like may be included. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.
Fig. 1 is a schematic diagram of a main hardware structure of a mobile terminal implementing various embodiments of the present invention.
The mobile terminal 100 may include a wireless communication unit 110, an a/V input unit 120, a user input unit 130, a memory 140, an audio output unit 150, a controller 160, and the like. Fig. 1 illustrates a mobile terminal having various major components, but it is to be understood that not all illustrated components are required to be implemented. More or fewer components may alternatively be implemented. Elements of the mobile terminal will be described in detail below.
The wireless communication unit 110 typically includes one or more components that allow radio communication between the mobile terminal 100 and a wireless communication system or network. For example, the wireless communication unit may include a mobile communication module, a short range communication module 114, and the like.
The mobile communication module 2 transmits and/or receives radio signals to and/or from at least one of a base station (e.g., access point, node B, etc.), an external terminal, and a server. Such radio signals may include voice call signals, video call signals, or various types of data transmitted and/or received according to text and/or multimedia messages.
The short-range communication module is a module for supporting short-range communication. Some examples of short-range communication technologies include bluetoothTMWiFi, Radio Frequency Identification (RFID), Infrared data Association (IrDA), Ultra Wideband (UWB), ZigbeeTMAnd so on.
The a/V input unit 120 is used to receive an audio or video signal. The a/V input unit 120 may include a camera and a microphone, etc.
The user input unit 130 may generate key input data according to a command input by a user to control various operations of the mobile terminal. The user input unit 130 allows a user to input various types of information, and may include a keyboard, a dome sheet, a touch pad, a jog wheel, and the like. In particular, when the touch panel is superimposed on the display unit in the form of a layer, a touch screen may be formed.
The audio output module 150 may convert audio data received by the wireless communication unit 110 or stored in the memory 140 into an audio signal and output as sound when the mobile terminal is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output module 150 may provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output module 150 may include a speaker, a buzzer, and the like.
The memory 140 may store software programs and the like for processing and controlling operations performed by the controller 160, or may temporarily store data (e.g., a phonebook, messages, still images, videos, and the like) that has been or is to be output. Also, the memory 140 may store data regarding various ways of vibration and audio signals output when a touch is applied to the touch screen.
The memory 140 may include at least one type of storage medium including a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, and so on. Also, the mobile terminal 100 may cooperate with a network storage device that performs a storage function of the memory 160 through a network connection.
The controller 160 generally controls the overall operation of the mobile terminal. For example, the controller 160 performs control and processing related to a voice call, data communication, a video call, and the like, and may perform pattern recognition processing to recognize a handwriting input or a picture drawing input performed on the touch screen as characters or images, and the like.
The various embodiments described herein may be implemented in a computer-readable medium using, for example, computer software, hardware, or any combination thereof. For a hardware implementation, the embodiments described herein may be implemented using at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, an electronic unit designed to perform the functions described herein, and in some cases, such embodiments may be implemented in the controller 180. For a software implementation, the implementation such as a process or a function may be implemented with a separate software module that allows performing at least one function or operation. The software codes may be implemented by software applications (or programs) written in any suitable programming language, which may be stored in memory 140 and executed by controller 160.
Based on the mobile terminal, various embodiments of the present invention are provided.
As shown in fig. 2, a first embodiment of the present invention proposes a mobile terminal with a noise reduction function, including:
a first short-range wireless communication module 10, a noise reduction signal generation module 12 and an audio playing module 14;
the first short-range wireless communication module 10 is configured to receive an ambient noise signal sent by the noise detection device through the second short-range wireless communication module;
the noise reduction signal generation module 12 is configured to generate an audio noise reduction signal with a phase opposite to that of the received ambient noise signal;
the audio playing module 14 is configured to play the audio noise reduction signal.
The present embodiment is described from the mobile terminal side, and the noise detection means is not shown in fig. 2. The mobile terminal can be through short range wireless communication module, for example WIFI, bluetooth, or other 2.4G non-bluetooth protocol communication module (like Nordic's 2.4G private protocol module), receive the ambient noise signal that noise detection device sent through WiFi, bluetooth or 2.4G non-bluetooth protocol communication module, the ambient noise signal is the ambient noise signal all around that noise detection device detected, with the position that noise detection device set up is relevant, for example can with noise detection device sets up near door and window, or attached on glass door and window, can detect the ambient noise outside the door and window, including noise such as car horn sound, construction noise, square dance sound. After the mobile terminal receives the noise signal through the WiFi, Bluetooth or 2.4G non-Bluetooth protocol communication module, the noise signal is generated into an audio noise reduction signal through the internal noise reduction signal generation module according to the environment noise signal, and the audio noise reduction signal can be played through the mobile terminal audio playing module, so that noise near the mobile terminal is reduced or offset, and the active noise reduction effect is achieved.
The mobile terminal provided by the embodiment of the invention can generate the audio noise reduction signal with the phase opposite to that of the noise signal according to the received noise signal, and the audio noise reduction signal is played through the audio playing module of the mobile terminal, so that the noise near the mobile terminal is reduced or offset, and the active noise reduction effect is achieved.
Optionally, the audio playing module is configured to directly play the audio noise reduction signal; or playing the audio noise reduction signal through an external device, wherein the external device is connected to the mobile terminal in a wireless or wired mode.
In this embodiment, the mobile terminal may directly play the audio noise reduction signal by using a built-in audio playing module and a speaker to offset noise near the mobile terminal; the external loudspeaker or the sound box can also be adopted, and the audio playing module of the mobile terminal is utilized to transmit the audio noise reduction signal to the external loudspeaker or the sound box in a wired or wireless mode, so that the noise around the audio playing module can be better offset. For example, the 3.5mm audio output port of the mobile terminal can be used to connect to an external speaker or a sound box through an audio cable; the external loudspeaker or the sound box with the wireless receiving capacity can be sent to be played through a WiIF, Bluetooth or 2.4G non-Bluetooth module of the mobile terminal, the external loudspeaker or the sound box is more flexible to use and can be moved at any time in an effective range, and the placing position of the external loudspeaker or the sound box is flexibly adjusted according to the position where noise is required to be reduced, so that the active noise reduction effect is better achieved.
As shown in fig. 3, the second embodiment of the present invention further provides a noise reduction apparatus, which includes a mobile terminal 1 and a noise detection device 2, wherein the mobile terminal 1 includes a first short-range wireless communication module 10, a noise reduction signal generation module 12 and an audio playing module 14, and the noise detection device 2 includes an audio sensing module 20 and a second short-range wireless communication module 22;
the audio sensing module 20 is configured to detect ambient noise and transmit the ambient noise to the second short-range wireless communication module 22;
the second short-range wireless communication module 22 is configured to send the ambient noise signal to the mobile terminal;
the first short-range wireless communication module 10 is configured to receive an ambient noise signal sent by the second short-range wireless communication module 20;
the noise reduction signal generation module 12 is configured to generate an audio noise reduction signal with a phase opposite to that of the received ambient noise signal;
the audio playing module 14 is configured to play the audio noise reduction signal.
The noise reduction device provided by the embodiment comprises a noise detection device and a mobile terminal, wherein the noise detection device comprises an audio sensing module and a second short-range wireless communication module, the audio sensing module detects ambient noise, transmits the ambient noise to the second short-range wireless communication module, and the second short-range wireless communication module wirelessly transmits the ambient noise to the mobile terminal; the second short-range wireless communication module can be a WiFi, Bluetooth or 2.4G non-Bluetooth protocol module as long as the second short-range wireless communication module can interact and transmit audio signals with the first short-range wireless communication module configured by the mobile terminal. Usually, a WIFI module and a Bluetooth module are configured on the mobile terminal, and a 2.4G non-Bluetooth protocol module can also be expanded. Therefore, the noise detection device can adopt a WIFI module, a Bluetooth module or a 2.4G non-Bluetooth protocol module as the second short-range wireless communication module according to the configuration condition of the mobile terminal.
The mobile terminal receives an environmental noise signal detected and sent by the noise audio detection device through the first short-range wireless communication module corresponding to the noise detection device, generates an audio noise reduction signal with a phase opposite to that of the received environmental noise signal by using the noise reduction signal generation module, and plays the audio noise signal through the audio playing module, so that the environmental noise near the mobile terminal is reduced or offset.
The noise reduction device provided by the embodiment of the invention can detect the environmental noise by using the noise detection device, wirelessly sends the detected environmental noise signal to the mobile terminal, generates the audio noise reduction signal with the phase opposite to that of the noise signal according to the received noise signal by the mobile terminal, and plays the audio noise reduction signal through the audio playing module, thereby reducing or offsetting the noise near the mobile terminal and playing the active noise reduction effect.
Optionally, the audio sensing module includes a microphone or microphone, which may be based on the noise frequency range and the desired detection sensitivity.
Optionally, the noise detection device further comprises an adsorption part for fixing the noise detection device. For example, a component similar to a sucker can be configured on the noise detection device, the noise detection device comprising a high-sensitivity microphone and a WiFi, Bluetooth or 2.4G non-Bluetooth protocol module is adsorbed on a window, and by utilizing the 'stethoscope effect' of the structure, the noise detection device can well collect the automobile whistling outside the window, construction noise, square dance noise and other environmental noise signals.
As another embodiment, as shown in fig. 4, alternatively, the audio playing module may be disposed outside the mobile terminal, such as an external loudspeaker or a sound box, and the audio noise reduction signal generated by the mobile terminal is output through a 3.5mm audio output interface and connected to the external loudspeaker or the sound box through an audio signal line, so that the external high-fidelity high-power loudspeaker or the sound box can be used to achieve a better noise reduction effect.
As another embodiment, as shown in fig. 5, alternatively, an external wireless speaker or sound box may be used, and an audio noise reduction signal generated by the mobile terminal may be wirelessly transmitted to the external wireless speaker or sound box through a WiFi, bluetooth or 2.4G non-bluetooth protocol module, so that not only an external high-fidelity high-power speaker or sound box may be used to achieve a better noise reduction effect, but also the speaker or sound box may be more flexibly placed within an effective range, and the active noise reduction effect is improved for an area where noise reduction is required.
Correspondingly, the present invention further provides a noise reduction method, which is applicable to a mobile terminal, as shown in fig. 6, and includes:
step 10: detecting the transmitted environmental noise signal by a short-range wireless communication receiving noise detection device;
step 12: and generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal, and playing the audio noise reduction signal through an audio playing module.
Optionally, the playing by the audio playing module includes:
directly playing the audio noise reduction signal through the audio playing module; or,
playing the audio noise reduction signal through an external device, wherein the external device is connected to the mobile terminal in a wireless or wired mode.
The directly playing the audio noise reduction signal refers to playing by using an audio playing module (including a speaker) built in the mobile terminal, for example, the mobile terminal can be placed in an area where noise reduction is desired, for example, when a user has a rest, the mobile terminal can be directly placed at the edge of the pillow to reduce the influence of noise. The high-power high-fidelity loudspeaker or the sound box can be expanded outside the mobile terminal, the audio noise reduction signal is transmitted to the expanded high-power high-fidelity loudspeaker or the sound box through the audio output interface of the mobile terminal, the audio noise reduction signal can be transmitted to the expanded high-power high-fidelity wireless loudspeaker or the sound box by utilizing WiFi, Bluetooth or 2.4G non-Bluetooth protocol wireless communication, and the use is more flexible.
According to the noise reduction method provided by the embodiment of the invention, the mobile terminal can be utilized to generate the audio noise reduction signal with the phase opposite to that of the noise signal according to the received noise signal, and the audio noise reduction signal is played through the audio playing module of the mobile terminal, so that the noise of the mobile terminal accessory is reduced or offset, and the active noise reduction effect is achieved.
Correspondingly, the invention also provides another noise reduction method which is suitable for the noise reduction equipment, as shown in FIG. 7, and comprises the following steps
Step 20, the noise detection device detects the environmental noise and sends the environmental noise signal to the mobile terminal through short-range wireless communication;
step 22: the mobile terminal receives the ambient noise signal through short-range wireless communication; and generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal, and playing the audio noise reduction signal through an audio playing module.
Optionally, the noise detection device includes a sound pickup or a microphone, and the sound pickup or the microphone with high sensitivity may be used for detection according to the specific situation of the environmental noise source (such as the frequency range of the noise, the noise level, and the like), and then wirelessly transmit the detected sound to the mobile terminal.
Optionally, the method further comprises:
the noise detection device is fixed by an adsorption part. Can will through adsorption element on noise detection device adsorbs window or glass, will include the noise detection device of high sensitivity microphone/adapter and WIFI, bluetooth or the non-bluetooth protocol module of 2.4G adsorb the window on, utilize the "stethoscope effect" of its structure, can collect outside the window environment noise signals such as car whistling sound, construction noise, square dance noise well.
According to the noise reduction method provided by the embodiment of the invention, the noise detection device can be used for detecting the environmental noise and wirelessly sending the detected environmental noise signal to the mobile terminal, the mobile terminal generates the audio noise reduction signal with the phase opposite to that of the noise signal according to the received noise signal, and the audio noise reduction signal is played through the audio playing module, so that the noise of the mobile terminal accessory is reduced or offset, and the active noise reduction effect is achieved.
The present invention is further illustrated by the following exemplary embodiments.
As shown in fig. 8a-8c, the wireless sound pickup module (noise detection device) sends the picked-up noise signal to the mobile terminal through short-distance wireless communication modes such as WIFI, bluetooth or 2.4G non-bluetooth protocol communication, the mobile terminal performs phase reversal on the audio waveform of the noise signal through software to quickly obtain the noise reduction audio signal, when the noise reduction audio signal is played through a speaker of the audio playing module, the phase of the noise reduction audio signal is opposite to that of the environmental noise signal, so that the environmental noise signal can be cancelled or partially cancelled, and the noise reduction effect is obtained.
Phase refers to the exact position that a point on the waveform reaches when it vibrates. For convenience of explanation, taking a sine wave signal as an example, as shown in fig. 8a, in a coordinate graph of a sine function, when any point on the function graph makes a periodic motion along a curve of the sine function, the coordinate function of the point changes, and the position of the point is called a phase. When its Y-axis position changes from a positive maximum point to a negative maximum point and the X-axis value does not change, the maximum value coordinate of the left half waveform of fig. 8a changes from (-1, 1) to the left half waveform maximum value coordinate of fig. 8B (-1, -1), which is equal to performing a phase inversion, such as the transformation of waveform a in fig. 8a to waveform B in fig. 8B. The phase inversion is the inversion of the upper and lower edges of a waveform along the medial axis (X-axis). For example, when the peak point of one wave in the above function graph is at (-1, 1) position, and the valley point of another wave with the same frequency is at (-1, -1) position, the resultant Y-axis value is 0 when the peak and valley points of the two waves with the same frequency are added, as shown in fig. 8a, waveform a and fig. 8B, waveform B, and waveform amplitude on the Y-axis is 0, which is called phase cancellation. Assuming that the waveform A is a received noise signal, the noise reduction signal with the waveform B and the opposite phase can be obtained by software processing of a microprocessor of the mobile terminal, when the signal of the waveform B is played, the phase is just opposite to that of the noise signal of the waveform A in the surrounding environment, the waveform A noise signal and the waveform B noise reduction signal in the surrounding environment are mutually superposed to obtain a signal with the amplitude of 0 on the Y axis, namely the original noise signal A disappears, so that the purpose of noise reduction is achieved. The actual noise wave forms a mixture of multiple frequencies, and when the phase inversion processing is performed in the same process and effect, the noise can be reduced or eliminated by generating and playing the noise reduction signals with opposite phases according to the noise signals.
The specific steps are shown in fig. 8c, and include:
step 30: the wireless pickup module picks up environmental noise;
step 31: sending the environmental noise signal to a mobile terminal through short-range wireless communication; for example, WiFi, bluetooth, or 2.4G non-bluetooth communication modules may be employed for transmission;
step 32: the mobile terminal receives the noise signal through short-range wireless communication; for example, a corresponding WiFI, bluetooth, or 2.4G non-bluetooth communication module may be employed for reception;
step 33: the interior of the mobile terminal is processed by software, and phase reversal is carried out on the noise signal to obtain a noise reduction audio signal;
step 34: the noise reduction audio signals are played through a loudspeaker of the mobile terminal, or the noise reduction audio signals are transmitted to an external loudspeaker or a sound box through a 3.5mm earphone interface and an audio line to be played, and the noise reduction audio signals can also be transmitted to a wireless loudspeaker or a sound box to be played through a WiFI, Bluetooth or 2.4G non-Bluetooth communication module. If an external loudspeaker or sound box is adopted, a high-fidelity high-power loudspeaker or sound box can be selected according to the requirement, and a better noise reduction effect can be obtained.
Scenario one, as shown in fig. 9, the handset is placed around the user,
step 40: adsorbing a noise detection device on a window glass close to a noise source, and turning on a power switch; the noise detection means may be powered by a battery, such as a dry cell battery or a rechargeable lithium battery.
Step 41: opening a mobile phone noise reduction function, and realizing wireless pairing with a noise detection device; for example, pairing may be accomplished using WiFi wireless communication.
Step 42: when the noise detection device detects a noise signal, the noise signal is sent to the mobile phone in a wireless mode through WiFi at regular time; whenever the handset receives a noise signal, the handset performs fast phase reversal on the received noise signal.
Step 43: and playing the noise reduction signal obtained by inverting the phase through a mobile phone loudspeaker.
The user may also use the audio line to connect the noise reduction signal to an external speaker or sound box through the earphone interface for playing (as shown by the dotted line in the figure, optional configuration), and the external speaker or sound box may be used to provide the power of the noise reduction signal.
In a second scenario, as shown in fig. 10, it is assumed that the mobile phone is configured with WiFi and 2.4G non-bluetooth modules, and the mobile phone is placed around the user;
step 50: adsorbing a noise detection device on a window glass close to a noise source, and turning on a power switch; the noise detection device can be powered by a battery, such as a dry battery or a rechargeable lithium battery;
the wireless loudspeaker is arranged in an area where noise reduction is expected, a power supply of the wireless loudspeaker is turned on, and the wireless loudspeaker can be powered by a lithium battery or an AC/DC power supply;
step 51: opening a mobile phone noise reduction function, and realizing wireless pairing with a noise detection device; for example, pairing may be achieved using WiFi wireless communication; pairing the mobile phone with the wireless loudspeaker/sound box through 2.4G non-Bluetooth wireless communication; (Bluetooth can also be adopted for pairing, and the pairing is selected according to the mobile phone setting and the wireless module of the wireless loudspeaker)
Step 52: when the noise detection device detects a noise signal, the noise signal is sent to the mobile phone in a wireless mode through WiFi at regular time; whenever the handset receives a noise signal, the handset performs fast phase reversal on the received noise signal.
Step 53: and transmitting the noise reduction signal obtained by inverting the phase to a wireless loudspeaker or a sound box for playing through a 2.4G non-Bluetooth protocol.
By adopting the wireless loudspeaker/sound box, on one hand, the noise reduction signal power can be provided, on the other hand, the placing position of the wireless loudspeaker/sound box is more flexible, no special requirement is required for the placing position of the mobile phone, and the wireless loudspeaker/sound box can meet the wireless communication requirement as long as the mutual space distance is satisfied.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A mobile terminal is characterized by comprising a first short-range wireless communication module, a noise reduction signal generation module and an audio playing module;
the first short-range wireless communication module is used for receiving an environmental noise signal sent by the noise detection device through the second short-range wireless communication module;
the noise reduction signal generation module is used for generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal;
and the audio playing module is used for playing the audio noise reduction signal.
2. The mobile terminal of claim 1, wherein,
the audio playing module is used for directly playing the audio noise reduction signal; or,
playing the audio noise reduction signal through an external device, wherein the external device is connected to the mobile terminal in a wireless or wired mode.
3. The noise reduction equipment is characterized by comprising a mobile terminal and a noise detection device, wherein the mobile terminal comprises a first short-range wireless communication module, a noise reduction signal generation module and an audio playing module, and the noise detection device comprises an audio sensing module and a second short-range wireless communication module;
the audio sensing module is used for detecting environmental noise and transmitting the environmental noise to the second short-range wireless communication module;
the second short-range wireless communication module is used for sending the environment noise signal to the mobile terminal;
the first short-range wireless communication module is used for receiving the environmental noise signal sent by the second short-range wireless communication module;
the noise reduction signal generation module is used for generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal;
and the audio playing module is used for playing the audio noise reduction signal.
4. The apparatus of claim 3, wherein,
the audio sensing module includes a microphone or microphone.
5. The apparatus of claim 3 or 4,
the noise detection device further comprises an adsorption part for fixing the noise detection device.
6. A noise reduction method is suitable for a mobile terminal, and is characterized by comprising the following steps:
detecting the transmitted environmental noise signal by a short-range wireless communication receiving noise detection device;
and generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal, and playing the audio noise reduction signal through an audio playing module.
7. The method of claim 6,
the audio playing module directly plays the audio noise reduction signal; or,
playing the audio noise reduction signal through an external device, wherein the external device is connected to the mobile terminal in a wireless or wired mode.
8. A method of noise reduction, comprising:
the noise detection device detects environmental noise and sends the environmental noise signal to the mobile terminal through short-range wireless communication;
the mobile terminal receives the ambient noise signal through short-range wireless communication; and generating an audio noise reduction signal with the phase opposite to that of the received environment noise signal, and playing the audio noise reduction signal through an audio playing module.
9. The method of claim 8, wherein,
the noise detection device comprises a sound pickup or a microphone.
10. The method of claim 8 or 9, further comprising:
the noise detection device is fixed by an adsorption part.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285098A (en) * | 2018-12-12 | 2019-01-29 | 广东小天才科技有限公司 | Learning auxiliary method, learning auxiliary client and electronic learning equipment |
| CN109559757A (en) * | 2018-11-30 | 2019-04-02 | 维沃移动通信有限公司 | A kind of method of canceling noise and mobile terminal |
| CN111316355A (en) * | 2017-11-03 | 2020-06-19 | 深圳传音通讯有限公司 | Audio noise reduction method, noise reduction device, mobile terminal and readable storage medium |
| WO2021031787A1 (en) * | 2019-08-16 | 2021-02-25 | 南京中兴新软件有限责任公司 | Router and interference elimination apparatus and method thereof, and storage medium |
| CN112954547A (en) * | 2021-02-02 | 2021-06-11 | 艾普科模具材料（上海）有限公司 | Active noise reduction method, system and storage medium thereof |
| CN115988380A (en) * | 2023-03-21 | 2023-04-18 | 东莞市云仕电子有限公司 | Children wireless earphone with sleep promoting function and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201616843U (en) * | 2010-03-18 | 2010-10-27 | 华为终端有限公司 | Audio frequency device capable of lowering noise and noise reducing mobile phone |
| EP2549775A2 (en) * | 2009-04-28 | 2013-01-23 | Bose Corporation | Dynamically configurable ANR filter and signal processing topology |
| CN103531195A (en) * | 2012-07-02 | 2014-01-22 | 华为技术有限公司 | Noise reduction method, equipment and system |
| CN203721181U (en) * | 2014-02-10 | 2014-07-16 | 杭州歌丽瑞环保科技有限公司 | Household active noise reduction device |
| CN104602155A (en) * | 2015-01-14 | 2015-05-06 | 中山市天键电声有限公司 | Wireless noise reduction earphone based on intelligent mobile terminal |
| CN104618569A (en) * | 2013-11-01 | 2015-05-13 | 现代自动车株式会社 | Active noise control system and method using smartphone |
| CN105516851A (en) * | 2016-01-21 | 2016-04-20 | 努比亚技术有限公司 | Earphone control device |
| CN105702259A (en) * | 2014-12-11 | 2016-06-22 | 现代自动车株式会社 | Method and system for removing active noise of car |
-
2016
- 2016-07-29 CN CN201610618994.2A patent/CN106210987A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2549775A2 (en) * | 2009-04-28 | 2013-01-23 | Bose Corporation | Dynamically configurable ANR filter and signal processing topology |
| CN201616843U (en) * | 2010-03-18 | 2010-10-27 | 华为终端有限公司 | Audio frequency device capable of lowering noise and noise reducing mobile phone |
| CN103531195A (en) * | 2012-07-02 | 2014-01-22 | 华为技术有限公司 | Noise reduction method, equipment and system |
| CN104618569A (en) * | 2013-11-01 | 2015-05-13 | 现代自动车株式会社 | Active noise control system and method using smartphone |
| CN203721181U (en) * | 2014-02-10 | 2014-07-16 | 杭州歌丽瑞环保科技有限公司 | Household active noise reduction device |
| CN105702259A (en) * | 2014-12-11 | 2016-06-22 | 现代自动车株式会社 | Method and system for removing active noise of car |
| CN104602155A (en) * | 2015-01-14 | 2015-05-06 | 中山市天键电声有限公司 | Wireless noise reduction earphone based on intelligent mobile terminal |
| CN105516851A (en) * | 2016-01-21 | 2016-04-20 | 努比亚技术有限公司 | Earphone control device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111316355A (en) * | 2017-11-03 | 2020-06-19 | 深圳传音通讯有限公司 | Audio noise reduction method, noise reduction device, mobile terminal and readable storage medium |
| CN109559757A (en) * | 2018-11-30 | 2019-04-02 | 维沃移动通信有限公司 | A kind of method of canceling noise and mobile terminal |
| CN109285098A (en) * | 2018-12-12 | 2019-01-29 | 广东小天才科技有限公司 | Learning auxiliary method, learning auxiliary client and electronic learning equipment |
| WO2021031787A1 (en) * | 2019-08-16 | 2021-02-25 | 南京中兴新软件有限责任公司 | Router and interference elimination apparatus and method thereof, and storage medium |
| CN112954547A (en) * | 2021-02-02 | 2021-06-11 | 艾普科模具材料（上海）有限公司 | Active noise reduction method, system and storage medium thereof |
| CN115988380A (en) * | 2023-03-21 | 2023-04-18 | 东莞市云仕电子有限公司 | Children wireless earphone with sleep promoting function and method |
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Application publication date: 20161207 |