WO2019056301A1

WO2019056301A1 - Noise-cancelling headphones

Info

Publication number: WO2019056301A1
Application number: PCT/CN2017/102926
Authority: WO
Inventors: 张文海; 张玉磊
Original assignee: 深圳传音通讯有限公司
Priority date: 2017-09-22
Filing date: 2017-09-22
Publication date: 2019-03-28

Abstract

Provided by the present invention are noise-cancelling headphones: a headphone seat is provided on a connecting line of a headphone body, and a noise reduction chip, as well as an auxiliary circuit thereof, of a noise-cancelling system are encapsulated within the headphone seat; a headphone plug that is disposed at a tail end of the connecting line, being correspondingly inserted into a socket jack of an external electronic device such that a driving power supply provided by the electronic device may connect a microphone line within the headphone seat by means of the headphone plug and the connecting line, thereby providing power to a microphone and the noise-cancelling chip, as well as the auxiliary circuit thereof, without affecting the normal use of the microphone. The noise-cancelling headphones of the present invention do not need to increase the load of a battery as long as a connected mobile phone and like electronic devices are turned on normally, and the noise-cancelling function of the headphones may be continuously used, effectively reducing power consumption and reducing costs.

Description

Noise canceling earphone

Technical field

The invention relates to a noise reduction technology of an audio device, in particular to a noise canceling earphone.

Background technique

Headphones are one of the most important accessories for electronic devices such as mobile phones, and they are used in a wider range of everyday life. In noisy environments (transports such as public transportation, subways, train stations, etc.), when you call, listen to music or watch videos, you don't need headphones to have noise reduction function to isolate, reduce or eliminate external noise. To enhance the user experience.

Noise-cancelling headphones, in addition to the existing headphone plug and audio playback unit, are also provided with a noise reduction system, and the noise reduction principle is divided into active noise reduction and passive noise reduction. Passive noise reduction is to cover the ears with earmuffs, strengthen the sound tightness between the earphones and the ear canal, and prevent external noise from entering. Active noise reduction is to determine the characteristics of the waveform by collecting the noise of the surrounding environment. The built-in noise reduction circuit generates an inverted sound wave equivalent to the external noise, and then transmits it through the high-reduction speaker to cancel the noise. Therefore, in the noise reduction system with active noise reduction, it usually includes a pickup, a noise reduction circuit, and a speaker, and each part must ensure high quality to achieve the final result.

However, as shown in Figure 1, the noise reduction system of the active noise canceling headphone requires a dedicated power supply, usually including a battery, a voltage conversion and voltage stabilizing circuit, etc., so that the size, weight and cost of the noise canceling earphone are matched with ordinary earphones. Compared with the significant increase, it brings a certain restraint to the user's use of the headset, and it is also very inconvenient to carry. The components such as the voltage conversion circuit further complicate the structure of the noise-reducing earphone, resulting in a large number of parts, difficulty in mass production, and high cost.

Moreover, the battery disposed in the body of the earphone has a limited capacity, and has a great limitation on the time for the user to use the noise reduction function of the earphone. Once the battery is dead, the earphone loses the noise reduction function. Current solution The solution is to design a switch on the noise canceling earphone. Manual control is required to turn the noise reduction function on or off. If the user forgets to turn off and the earphone is always in the noise reduction state, the battery will be exhausted quickly, the battery life is short, and it needs to be frequent. Replace the battery or charge, the operation is complicated.

In addition, the noise reduction effect has a great relationship with the environmental noise. The noise of different frequencies and the noise reduction effect are also different. When users use noise canceling headphones in different environments such as public transportation and gym, the demand for noise reduction effect is different. The parameters of the existing noise canceling earphones are preset in the factory, and the noise reduction effect is single, and cannot be adjusted according to the needs of the user, and cannot be matched with the use environment.

Disclosure of invention

The invention provides a noise canceling earphone, wherein the external electronic device is connected with the microphone line of the earphone holder to supply power to the noise reduction system of the earphone without affecting the normal use of the microphone.

In order to achieve the above object, the technical solution of the present invention is to provide a noise canceling earphone, which includes:

a headphone body with a speaker;

The earphone holder is disposed on a connection line of the earphone body, and the noise reduction chip of the noise reduction system is packaged in the earphone holder;

The earphone plug provided at the end of the connection line is correspondingly inserted into the socket socket of the external electronic device, and the driving power provided by the electronic device supplies power to the noise reduction chip through the earphone plug and the connection line.

Preferably, the earphone plug comprises an electrically isolated left channel portion, a right channel portion, a microphone portion, and a ground portion, respectively corresponding to the left channel loop, the right channel loop, the microphone loop, and the ground loop in the electronic device The pins are electrically connected; the microphone of the noise canceling earphone and the noise reduction chip are respectively connected to the microphone portion and the ground portion to obtain power supply.

Preferably, the noise canceling earphone is provided with a switch on a line connecting the microphone portion to the ground portion, and when the microphone portion is connected to the ground portion through the switch, the microphone and the noise reduction chip are short-circuited to stop working, and/or A command signal is formed and transmitted to the electronic device.

Preferably, the noise canceling earphone is provided with a plurality of microphones for collecting sounds containing noise signals inside and/or outside of the noise canceling earphone through the microphone;

The noise reduction system comprises:

a filtering module that filters out the noise collected from the sound collected by the microphone;

The frequency amplitude adjustment module adjusts the spectrum and amplitude of the filtered noise signal;

The signal inversion module performs inverse processing on the frequency-adjusted noise signal to obtain a noise-cancellation signal;

The signal superimposing module superimposes the noise canceling signal on the audio signal played by the electronic device through the noise canceling earphone, and plays through the speaker to cancel the noise signal.

Preferably, the sound collected by the microphone includes a noise signal and a language signal;

The noise reduction system further includes a signal reduction module that subtracts the noise signal filtered by the filtering module from the noise signal and the language signal collected by the microphone to obtain a voice signal for output to the electronic device.

Preferably, an analysis module is disposed in the electronic device or the noise reduction system, and is respectively connected to a filter module and a frequency adjustment module of the noise reduction system;

The analyzing module analyzes the noise signal filtered by the filtering module to identify the noise mode of the environment in which the user is currently located, and outputs the noise signal to the frequency amplitude adjusting module in combination with the noise reduction parameter selected by the user. The instruction to control the frequency adjustment degree.

Preferably, the analyzing module identifies that when the second sound source is currently in the environment, the audio playing unit of the electronic device that is connected to the analyzing module is configured to weaken the volume of the audio signal played by the noise canceling headphone, and The sound signals corresponding to the second sound source obtained by sequentially processing the frequency adjustment module, the signal inversion module, and the signal superimposing module are superimposed and played together through the speaker.

Preferably, the correspondence between the scene type and the noise reduction parameter is recorded in the electronic device or the noise reduction system, according to the current scene type selected by the user or the current location identified by the analysis module. The scene type, the analysis module queries the corresponding relationship of the records, determines the noise reduction parameters that match the current scene type, and generates a noise reduction control instruction for the frequency amplitude adjustment module.

Preferably, the electronic device is provided with a noise reduction assistance system for controlling a driving power output to the noise reduction system;

The noise reduction auxiliary system acquires a noise reduction parameter of the noise reduction system, transmits it to a display screen of the electronic device for display, and receives an update value adjusted by the user for the noise reduction parameter, and sends the updated value to the noise reduction system, so that the noise reduction system The noise reduction process is performed according to the updated value of the noise reduction parameter.

Preferably, the noise reduction assistance system is connected to the audio playback unit of the electronic device to drive the audio playback unit to play a set of test sound signals of different frequencies and amplitudes to the user through the noise reduction earphone;

When the user hears the test sound signal of any frequency and amplitude, and outputs a feedback signal to the noise reduction auxiliary system through the electronic device or the noise canceling earphone, the noise reduction assisting system determines the sensitivity of the user to the test sound signal of the corresponding frequency and amplitude. Degree, and set the noise reduction parameter that matches the user's hearing level, and provides it to the noise reduction system.

Compared with the prior art, the noise canceling earphone of the present invention has the following advantages:

1. As long as the electronic device such as the mobile phone connected thereto is normally turned on, the earphone noise reduction system of the present invention can always obtain power supply to use the noise reduction function;

2. The power consumption of the present invention is smaller than that of a conventional noise canceling earphone;

3. The earphone of the invention does not need to increase the load of the battery itself, and is convenient to carry;

4. No need to configure the battery and power management module, the cost of the earphone of the invention can be lower than that of the conventional noise canceling earphone.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural view of a noise canceling earphone in the prior art;

2 is a schematic diagram of the noise canceling earphone of the present invention and its connection with an electronic device;

3 and FIG. 4 are two structural diagrams of the earphone plug of the present invention;

5 is a schematic diagram of a wiring principle of the noise canceling earphone of the present invention;

Figure 6 is a structural view showing an example of a noise reduction system in the present invention;

7 is a schematic diagram of a noise reduction earphone setting button switch according to the present invention;

8 is a schematic diagram of setting a plurality of microphones in the noise canceling headphone of the present invention;

9 is a schematic diagram of a microphone setting corresponding switch of the present invention;

10 is a schematic diagram of the internal and external noise of the microphone of the present invention;

11 is a schematic diagram of a principle when a microphone collects a voice signal in the present invention;

12 is a schematic diagram of power management of an electronic device to a headphone noise reduction system according to the present invention;

13 is a schematic diagram showing display and adjustment of noise reduction parameters of an electronic device in the present invention;

Figure 14 is a schematic view showing the setting of an analysis module in the present invention;

15 is a schematic diagram of an electronic device in the present invention when performing a hearing level test;

Figure 16 is a schematic illustration of the controlled operation of an audio playback unit in an electronic device of the present invention.

The best way to implement the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in FIG. 2, the noise canceling earphone of the present invention is provided with a headphone body 11; an earphone holder 12 is disposed on a connecting line of the earphone body 11, and a chip of the noise reduction system is packaged in the earphone holder 12 and An auxiliary circuit; an earphone plug 13 is provided at the end of the connecting wire, and is correspondingly inserted into the socket of the socket 91 of the external electronic device 90. The power supply unit of the electronic device 90 is connected to the power supply unit of the electronic device 90 through the earphone plug 13, and can be electrically connected to the microphone 20 in the earphone holder 12 to supply power to the noise reduction system.

The earphone plug 13 has a four-stage structure and is generally columnar. In an example shown in FIG. 3, the left channel portion, the right channel portion, the microphone portion, and the ground portion are sequentially included from the head. Electrical isolation is achieved through the insulating ring to prevent short circuit; the tail of the earphone plug 13 is provided with a coaxial disc-shaped base, which is made of an insulating material, protects the packaged wires, and also takes the earphone plug 13 Convenience. In the example of the other earphone plug 13' shown in Fig. 4, the positions of the ground portion and the microphone portion are interchanged, and other structures and working principles are substantially the same.

The socket 91 of the electronic device 90 has a socket that matches the shape and size of the earphone plug 13, for example If it is 2.5mm or 3.5mm; after the earphone plug 13 is inserted, the inside of the jack is formed with a metal spring piece having a plurality of pins, which can closely contact the left channel portion, the right channel portion, the microphone portion of the earphone plug 13, respectively. The surface of the ground portion forms a corresponding electrical connection between the socket of the socket 91 and the earphone plug 13.

The electronic device 90 may be various sound source devices such as a mobile phone, a tablet, a computer, a music player, a television, a game machine, etc., but is not limited thereto. On the control circuit of the electronic device 90, a left channel loop, a right channel loop, a microphone loop, and a ground loop are formed respectively, through the corresponding pins and the left channel portion, the right channel portion, and the microphone on the earphone plug 13 The part and the grounding part are electrically connected. The left and right channel loops cooperate with the ground loop to output the audio signal provided by the electronic device 90 to the earphone plug 13 to drive the speaker 40 in the earphone body 11 to emit sound.

The microphone circuit cooperates with the ground circuit to supply power to the microphone 20 connected between the microphone portion and the ground portion of the earphone plug 13 by using the driving power provided by the electronic device 90. In the present invention, the chip and the auxiliary circuit of the noise reduction system are also connected. The microphone unit and the ground unit are powered by the driving power of the external electronic device 90. An example in which the noise reduction chip 30 is connected in parallel with the microphone 20 to obtain power is shown in FIG. 5, but the noise reduction chip 30 may also be connected in series with the microphone 20, or may be powered from the line of the microphone 20 by other wiring means.

The power source of the electronic device 90 may be powered by a battery or an electric plug 13 or the like, and may further include an auxiliary circuit such as a voltage conversion circuit, a voltage stabilization circuit, and a rectifier circuit, and the working device is provided with an operating voltage and current according to a conventional manner. And supplying power to the microphone 20 of the noise canceling earphone, the noise reduction chip 30, and the like. Therefore, it is not necessary to configure the power supply on the noise canceling earphone, which simplifies the design of the noise canceling earphone, saves the overall weight and volume, and improves the portability.

The microphone 20 is used for signal acquisition of noise, and the noise reduction system generates a reversed sound wave equivalent to noise to be delivered to the speaker 40 in the earphone body 11, and the inverted sound wave is superimposed on the normally played audio signal, The noise is neutralized. In the noise reduction system shown in FIG. 6, the filter module is used to filter the noise signal in the preset frequency range, and the frequency amplitude adjustment module adjusts the spectrum and amplitude of the noise signal, and the signal inversion module inverts the noise signal. Processing to get the noise cancellation signal, and then The signal superimposing module superimposes the denoising signal with the normally played audio signal, provides the speaker 40 for playing, and uses the denoising signal to cancel the original noise signal to achieve the noise reduction effect. By setting the frequency range used in the filtering of the filter module, the ambient noise of different frequency bands can be selectively eliminated and shielded.

As shown in FIG. 7, a button switch 50 may be disposed between the microphone portion and the ground portion of the earphone plug 13, and when the microphone portion is connected to the ground portion by pressing the button switch 50, the microphone 20 and the noise reduction chip 30 are short. Then stop working to control the on/off of the headphone noise reduction function. Moreover, the pressing signal of the button can also be sent to the external electronic device 90; in the electronic device 90, the number, frequency, duration, and the like of the pressing signal are pre-corresponding to the instruction for driving the electronic device 90 to perform certain actions, the electronic device When a press signal is received, the predetermined action is performed.

The microphone 20 may be mounted at the earphone holder 12 or may be mounted at the earphone body 11. In some examples, as shown in FIGS. 8-10, the noise reduction system is provided with a plurality of microphones 20, which can cause some of the main acquisition noise outside the earphone, and others mainly collect noise inside the earphone (see FIG. 10). For example, the microphone 20 that collects internal noise is disposed in the earphone body 11 to collect the same noise signal as that heard by the human ear; and the microphone 20 at the earphone holder 12 mainly collects external noise.

Different microphones 20 may send the collected information to the noise reduction chip 30 through respective corresponding channels; or, by means of a time division multiplexing circuit, the signals acquired by the respective microphones 20 are interleaved into different time periods and transmitted through the same channel. The noise reduction chip 30 then separates it by time slot.

As shown in FIG. 9, each of the

microphones

21, 22 may be provided with a

corresponding switch

51, 52, for example, connecting the

switches

51, 52 in series with the

corresponding microphones

21, 22, operating the

switches

51, 52 to turn the line on, then the corresponding

microphone

21, 22 power, start the collection of noise; conversely, when the

switches

51, 52 are operated to disconnect the line, the corresponding

microphones

21, 22 lose power, stop the collection of noise, and achieve refined control.

Moreover, the microphone 20 of the noise canceling earphone can also be used to collect the voice signal of the user, and the collected voice signal is transmitted to the electronic device 90 for processing, thereby applying the noise canceling earphone to the terminal device such as the mobile phone. Prepared call process. For example, the microphone 20 located at the earphone holder 12 may collect internal and external noise while collecting the voice signal. For this, with reference to FIG. 6 and FIG. 11, after the microphone 20 collects the noise signal and the voice signal, the filtering module is adopted. Processing the noise signal, on the one hand, the noise signal is sent to the frequency amplitude adjustment module, and the noise reduction processing shown in FIG. 6 is continued; on the other hand, the filtered noise signal is sent to the signal reduction module, and the noise signal collected from the microphone 20 is collected. The filtered noise signal is removed from the voice signal, and the resulting voice signal is output to the electronic device 90.

The noise reduction assistance system may be further disposed in the electronic device 90, such as hardware, software module, firmware, or a combination thereof, and can receive and process the noise signal collected by the noise canceling earphone, thereby assisting the noise reduction effect. control. As shown in FIG. 12, the noise reduction assistance system can turn on or off the power output of the noise canceling earphone, thereby correspondingly activating or deactivating the noise reduction function of the earphone.

The noise reduction assistance system can also be used to set and adjust operating parameters related to the noise reduction effect on the electronic device 90 and/or the noise canceling earphone. As shown in FIG. 13 , the noise reduction assisting system can obtain the noise reduction parameter of the noise canceling earphone, and display the value of the noise reduction level in various manners such as a sliding bar and a numerical list on the display screen of the electronic device 90, or further The frequency range of the filter noise, the spectrum of the noise canceling signal, and the amplitude are displayed. The user adjusts the value of the noise reduction parameter through the input unit (touch screen, button) of the electronic device 90, and the noise reduction auxiliary system receives the update. The value is displayed on the display and sent to the noise reduction system of the earphone to control the noise reduction effect.

For example, the value of the noise reduction level can be adjusted from 0 to 100%. Assuming that the user wants the audibility of the external sound to be 70%, the noise reduction degree of the earphone is set to 30% for real-time operation, and the audio signal transmitted from the speaker 40 is superimposed on the opposite phase of the noise, and the amplitude is equal to the above-mentioned noise reduction degree ( 30%) Corresponding conditions of the sound wave to offset 30% of the noise, so that the audibility of the noise after the noise is 70%, that is, the external sound after noise reduction is 30% of the external sound before noise reduction.

As shown in FIG. 14, the noise reduction assistance system may further be provided with an analysis module, wherein the signal is connected to the filter module and the frequency amplitude adjustment module of the earphone noise reduction system; the analysis module analyzes the filtered noise signal, for example, Calculate the signal intensity distribution characteristics of different frequency components in the noise signal, and the duration and repetition characteristics of the noise of the specific frequency band on the time axis, and obtain the phase of the noise signal. The parameter is compared with the frequency and time domain characteristic parameters of some preset specific environmental noises to identify the environment in which the current user is located, to find the environmental noise model that best matches the current noise signal, and to combine the noise reduction parameters selected by the user. The frequency adjustment degree of the noise signal is outputted to the noise reduction system of the earphone, so that the signals of different frequency bands can be amplified or attenuated to enhance the noise reduction effect of certain specific frequency bands or specific types of noise. At the same time, the amplitude of the noise reduction signal can be automatically adjusted under different environmental conditions to avoid excessive noise reduction or insufficient noise reduction. In another embodiment, the analysis module that can implement the above functions is disposed in the noise reduction system of the earphone, and the signal is connected to the filter module and the frequency amplitude adjustment module of the earphone noise reduction system.

A plurality of scene types are stored in the noise reduction system of the electronic device 90 or the earphone in advance, and a set of noise reduction parameters is determined for each scene type, and the correspondence between the scene type and the noise reduction parameter is stored in a form such as a table. For example, in the gym environment, the noise in the high frequency band such as vocals is mainly reduced, and in the public transportation environment, the noise in the low frequency band such as the buzzer sound is mainly reduced. When the analysis module identifies the target scene type corresponding to the scene, the corresponding target correlation noise can be determined by querying the preset correspondence, and corresponding noise reduction control instructions are generated (such as including an inverse for canceling noise). The frequency, amplitude and other parameters of the sound wave are supplied to the noise reduction system.

In addition to setting corresponding noise reduction parameters for different scenes, corresponding noise reduction parameters can also be set for different hearing levels of the user. For example, as shown in FIG. 15, under the control of the noise reduction assistance system, the audio playback unit of the electronic device 90 plays a set of test sound signals of different frequencies and amplitudes to the user through the earphones, instructing the user to hear a certain set of test sounds. After the signal, the feedback signal is given by pressing the push button switch 50 on the earphone or through the input unit of the electronic device 90 within a prescribed time. Assume that the user is sensitive to sounds at 80 Hz, 200 Hz, and 400 Hz, giving feedback signals; and is not sensitive to sounds at frequencies of 600 Hz, 1000 Hz, 1200 Hz, and 1500 Hz, and no feedback signal is given, indicating that the user is more sensitive to low frequency sounds. According to this, the noise reduction auxiliary system sets the corresponding noise reduction parameter for the user to the noise reduction system of the earphone, for example, the corresponding noise reduction level of the user is set to 18dB to 25dB.

The common users of the electronic device 90 are generally one or a few people with a fixed number of people, and therefore, no frequency is required. The above test of the hearing level and the setting of the corresponding noise reduction parameters are carried out. The noise reduction assistance system of the electronic device 90 gives corresponding identification marks to different device users, and records corresponding noise reduction parameters of each device user. When the user is switched, the corresponding identification mark of the current user is input, and the noise reduction assistance system obtains the corresponding noise reduction parameter accordingly, and generates a corresponding noise reduction control instruction to provide the noise reduction system of the earphone.

The noise reduction assistance system can also control the audio playback unit of the electronic device 90. As shown in FIG. 16, when the analysis module recognizes that there is a second sound source of the outside in the noise signal, for example, a broadcaster, a broadcast information received by a scene such as an airport or a train station, etc., for which the noise reduction assistance system recognizes The signal of the second sound source is subjected to adjustment processing such as frequency amplitude, and is superimposed on the audio signal output by the electronic device 90 through the earphone, and is played to the user; and the audio signal originally outputted to the earphone by the electronic device 90 can be simultaneously fine-tuned. Adjustment, such as lowering the volume or pausing the playback of the audio signal so that the user can hear the sound of the second source. Moreover, after the second sound source ends playing, the original playback effect of the audio signal can be restored.

Although the present invention has been described in detail by the preferred embodiments thereof, it should be understood that the foregoing description should not be construed as limiting. Various modifications and alterations of the present invention will be apparent to those skilled in the art. Therefore, the scope of the invention should be defined by the appended claims.

Claims

A noise canceling earphone, comprising:

a headphone body with a speaker;

The earphone holder is disposed on a connection line of the earphone body, and the noise reduction chip of the noise reduction system is packaged in the earphone holder;

The earphone plug provided at the end of the connection line is correspondingly inserted into the socket socket of the external electronic device, and the driving power provided by the electronic device supplies power to the noise reduction chip through the earphone plug and the connection line.
The noise canceling earphone of claim 1 wherein

The earphone plug includes an electrically isolated left channel portion, a right channel portion, a microphone portion, and a ground portion, respectively corresponding to pins of the electronic device corresponding to the left channel loop, the right channel loop, the microphone loop, and the ground loop The electrical connection is formed; the microphone of the noise canceling earphone and the noise reduction chip are respectively connected to the microphone portion and the ground portion to obtain power supply.
The noise canceling earphone of claim 2, wherein

The noise canceling earphone is provided with a switch on a line connecting the microphone portion to the ground portion, and when the microphone portion is connected to the ground portion through the switch, the microphone and the noise reduction chip are short-circuited to stop working, and/or a command signal is formed. And send it to the electronic device.
The noise canceling earphone of claim 2, wherein

The noise canceling earphone is provided with a plurality of microphones, and the sounds containing noise signals inside and/or outside of the noise canceling earphone are collected through the microphone;

The noise reduction system comprises:

a filtering module that filters out the noise collected from the sound collected by the microphone;

The frequency amplitude adjustment module adjusts the spectrum and amplitude of the filtered noise signal;

The signal inversion module performs inverse processing on the frequency-adjusted noise signal to obtain a noise-cancellation signal;

The signal superimposing module superimposes the noise canceling signal on the audio signal played by the electronic device through the noise canceling earphone, and plays through the speaker to cancel the noise signal.
The noise canceling earphone of claim 3, wherein

The sound collected by the microphone includes a noise signal and a language signal;

The noise reduction system further includes a signal reduction module that subtracts the noise signal filtered by the filtering module from the noise signal and the language signal collected by the microphone to obtain a voice signal for output to the electronic device.
A noise canceling earphone according to claim 4 or 5, wherein

An analysis module is disposed in the electronic device or the noise reduction system, and is respectively connected to a filter module and a frequency adjustment module of the noise reduction system;

The analyzing module analyzes the noise signal filtered by the filtering module to identify the noise mode of the environment in which the user is currently located, and outputs the noise signal to the frequency amplitude adjusting module in combination with the noise reduction parameter selected by the user. The instruction to control the frequency adjustment degree.
A noise canceling earphone according to claim 6, wherein

When the analysis module recognizes that the user has a second sound source in the current environment, the audio playback unit of the electronic device connected to the analysis module is further configured to weaken the volume of the audio signal played by the noise reduction earphone and superimpose the sound signal. The sound signals corresponding to the second sound source obtained by sequentially processing the frequency amplitude adjustment module, the signal inversion module, and the signal superimposition module are played together through the speaker.
A noise canceling earphone according to claim 6, wherein

Corresponding relationship between the scene type and the noise reduction parameter is recorded in the electronic device or the noise reduction system, according to the current scene type selected by the user or the identification according to the analysis module. Before the scene type, the analysis module queries the corresponding relationship of the records, determines the noise reduction parameters that match the current scene type, and generates a noise reduction control instruction for the frequency amplitude adjustment module.
The noise canceling earphone according to any one of claims 1 to 8, wherein

The electronic device is provided with a noise reduction assistance system for controlling the driving power output to the noise reduction system;

The noise reduction auxiliary system acquires a noise reduction parameter of the noise reduction system, transmits it to a display screen of the electronic device for display, and receives an update value adjusted by the user for the noise reduction parameter, and sends the updated value to the noise reduction system, so that the noise reduction system The noise reduction process is performed according to the updated value of the noise reduction parameter.
A noise canceling earphone according to claim 9, wherein

The noise reduction auxiliary system is connected to the audio playing unit signal of the electronic device, and drives the audio playing unit to play a set of test sound signals of different frequencies and amplitudes to the user through the noise canceling earphone;

When the user hears the test sound signal of any frequency and amplitude, and outputs a feedback signal to the noise reduction auxiliary system through the electronic device or the noise canceling earphone, the noise reduction assisting system determines the sensitivity of the user to the test sound signal of the corresponding frequency and amplitude. Degree, and set the noise reduction parameter that matches the user's hearing level, and provides it to the noise reduction system.