An active noise reducing earphone

Abstract

The utility model discloses an active noise reduction earphone, including host microphone, noise reduction microphone, sounding unit, speech control chip, user audio frequency module and earphone cavity, host microphone sets up at the bottom of earphone cavity, and host microphone is connected to user audio frequency module through speech control chip, and user audio frequency module is connected with sounding unit and noise reduction microphone respectively, host microphone is used for gathering user speech, and is converted into first signal, and first signal is transmitted to speech control chip, speech control chip is used for converting first signal into mode control signal, and mode control signal generated is transmitted to user audio frequency module, user audio frequency module is used for receiving the environmental noise of noise reduction microphone gathering, and according to mode control signal switching processing environmental noise's signal processing circuit, and the signal processing circuit generated noise reduction signal is sent to sounding unit and plays. The application realizes the speech control of earphone mode, and improves the use experience.

Description

Technical Field

[0001] This utility model relates to the field of headphone technology, and in particular to an active noise-canceling headphone. Background Technology

[0002] Active noise-canceling headphones actively cancel out ambient noise using Active Noise Cancellation (ANC) technology. Microphones pick up ambient sound waves, which are then processed by a chip to generate an "anti-noise wave" that is the opposite of the noise. These two waves superimpose and cancel each other out, thus reducing the perceived noise intensity. ANC headphones offer advantages such as efficient noise cancellation, a focused and immersive experience, hearing protection, and reduced volume dependence. By actively creating a quiet environment rather than passively relying on physical sound insulation, they not only solve the practical problem of noise interference but also improve the overall experience in terms of sound quality, battery life, and interaction through technological innovation, gradually becoming an essential device for users. However, ANC headphones still have shortcomings in certain usage scenarios. Current ANC headphones require users to switch modes via touch buttons or connected applications. For example, in scenarios like cycling or driving, this is inconvenient for users, leading to inconvenience and safety hazards. Utility Model Content

[0003] This invention provides an active noise-canceling headphone that offers users a voice interaction channel to control the headphone based on user commands, thereby improving the convenience of headphone use in specific scenarios and enhancing the user experience.

[0004] According to one aspect of this application, an active noise-canceling headphone is provided, wherein the active noise-canceling headphone includes: a main microphone, a noise-canceling microphone, a sound-generating unit, a voice control chip, a user audio module, and an earphone cavity; the main microphone is disposed at the bottom of the earphone cavity, the main microphone is connected to the user audio module through the voice control chip, and the user audio module is connected to the sound-generating unit and the noise-canceling microphone respectively; The main microphone is used to collect user voice, convert the user voice into a first signal, and transmit the first signal to the voice control chip; The voice control chip is used to convert the first signal into a mode control signal and transmit the generated mode control signal to the user audio module. The user audio module is used to receive ambient noise collected by the noise-canceling microphone, switch the signal processing circuit for processing the ambient noise according to the mode control signal, and send the noise-canceling signal generated by the signal processing circuit to the sound-generating unit. The sound-generating unit is used to play the noise-reduced signal.

[0005] Based on the above application, the noise-canceling microphone includes at least one of an external microphone and an internal microphone; The external microphone is located outside the rear cavity of the earphone housing, wherein the rear cavity is not used to fit into the user's ear canal, and the external microphone is used to collect external ambient noise; The internal microphone is located inside the fitting cavity of the earphone housing, wherein the fitting cavity is used to fit the user's ear canal, and the internal microphone is used to collect residual noise in the user's ear canal.

[0006] Based on the above application, the mode control signal includes at least a noise reduction control signal, a pass-through control signal, and a normal control signal, wherein the signal levels of the noise reduction control signal, the pass-through control signal, and the normal control signal are different.

[0007] Based on the above application, the signal processing circuit that switches to process the ambient noise according to the mode control signal is as follows: When the user audio module receives the noise reduction control signal, it switches the signal processing circuit that processes the ambient noise to the noise reduction processing circuit. The noise reduction processing circuit includes at least a noise reduction processing module and a first signal processing path. The processing chip configured in the noise reduction processing module is used to filter the ambient noise, and the first signal processing path is used to mix the filtered ambient noise with local audio.

[0008] Based on the above application, the signal processing circuit that switches to process the ambient noise according to the mode control signal is as follows: When the user audio module receives the pass-through control signal, it switches the signal processing circuit that processes the ambient noise to the pass-through processing circuit. The pass-through processing circuit includes at least a signal amplification circuit and a second signal processing path. The signal amplification circuit is used to amplify the ambient noise, and the second signal processing path is used to mix the amplified ambient noise with local audio.

[0009] Based on the above application, the signal processing circuit that switches to process the ambient noise according to the mode control signal is as follows: When the user audio module receives the normal control signal, it switches the signal processing circuit that processes the ambient noise to the normal processing circuit. The general processing circuit includes a microphone shutdown circuit and a local audio playback circuit. The microphone shutdown circuit is used to shut down the reception of ambient noise by the noise-canceling microphone, and the local audio playback circuit is used to play local audio.

[0010] Based on the aforementioned application, the voice control chip includes a signal acquisition module, a processing engine module, a storage module, and a communication interface module. The voice control chip is used to convert the first signal into a mode control signal, including: The signal acquisition module is connected to the main microphone and is used to acquire the first signal transmitted by the main microphone, wherein the first signal includes at least an analog signal; The processing engine module is configured with an audio processing program, which converts the first signal received by the signal acquisition module into the mode control signal. The storage module is used to store the audio processing program configured in the processing engine module; The communication interface module is used to transmit the mode control signal to the user audio module.

[0011] Based on the above application, the processing engine module includes at least one of a digital signal processor, a microprocessor, and a neural network processor.

[0012] Based on the above application, the voice control chip includes at least one of a single-core architecture chip and a multi-core heterogeneous chip.

[0013] Based on the above application, the user audio module further includes: a switching button, the switching button being disposed on the outer surface of the earphone cavity, the switching button being used to switch the signal processing circuit for processing the ambient noise.

[0014] The technical solution of this utility model embodiment provides an active noise-canceling headphone. This active noise-canceling headphone includes a main microphone, a noise-canceling microphone, a sound-generating unit, a voice control chip, a user audio module, and an earphone cavity. The voice control chip converts the collected user speech into control signals, which in turn trigger the switching of the signal processing circuit for handling ambient noise within the user audio module, thereby switching the noise-canceling mode of the active noise-canceling headphone. This embodiment adjusts the headphone's noise-canceling mode based on user voice, eliminating the need for manual operation of the active noise-canceling headphone, expanding user usage scenarios, and enhancing the user experience.

[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of an active noise-canceling headphone according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of a voice control chip according to an embodiment of the present utility model; Figure 3 This is a working example diagram of an active noise-canceling headphone provided according to an embodiment of the present utility model. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] Figure 1 This is a structural schematic diagram of an active noise-canceling headphone according to an embodiment of the present invention. See also... Figure 1The active noise-canceling headphones provided in this application embodiment include a main microphone 10, a noise-canceling microphone 11, a sound-generating unit 12, a voice control chip 13, a user audio module 14, and an earphone cavity 15. The main microphone 10 is disposed at the bottom of the earphone cavity 15, and the main microphone 10 is connected to the user audio module 14 through the voice control chip 13. The user audio module 14 is connected to the sound-generating unit 12 and the noise-canceling microphone 11 respectively.

[0021] The main microphone 10 is used to collect user voice, convert user voice into a first signal, and transmit the first signal to the voice control chip 13.

[0022] In this embodiment, the active noise-canceling headphones may consist of a main microphone 10, a noise-canceling microphone 11, a sound-generating unit 12, a voice control chip 13, a user audio module 14, and an earphone cavity 15. The main microphone 10 may be located at the bottom of the earphone cavity 15. See [reference needed]. Figure 1 The main microphone 10 can be positioned at the bottom of the earphone cavity 15, away from the sound-emitting unit 12. This prevents the main microphone 10 from picking up local audio emitted by the sound-emitting unit 12, thus preventing the user audio module 14 from misinterpreting the local audio as noise and enabling noise cancellation. Furthermore, since ambient noise mainly enters from below or the sides of the earphone (e.g., when wearing headphones, the area below the ears and on the sides of the cheeks is closer to the external space), positioning the main microphone 10 at the bottom of the earphone cavity 15 shortens the physical distance to the noise source, reducing sound attenuation during propagation and allowing the main microphone 10 to more accurately capture low-frequency noise. The main function of the main microphone 10 is to convert user speech and other sound signals into analog or digital signals using a diaphragm or piezoelectric material. The analog or digital signal output by the main microphone 10 can be recorded as the first signal. It is understood that the main microphone 10 can be an electret condenser microphone or a microelectromechanical system (MEMS) microphone. The main microphone 10 can be connected to the voice control chip 13, and the main microphone 10 can transmit the generated first signal to the voice control chip 13 for processing.

[0023] The voice control chip 13 is used to convert the first signal into a mode control signal and transmit the generated mode control signal to the user audio module 14.

[0024] In this embodiment, the voice control chip 13 can recognize the first signal, i.e., the user's voice picked up by the main microphone 10, and determine the corresponding mode control signal based on the keywords or intent of the user's voice. The voice control chip 13 can have functions such as voice wake-up, voice recognition, semantic understanding, and command execution. The voice control chip 13 can convert the first signal in analog or digital form into a mode control signal. This mode control signal can trigger the active noise-canceling headphones to switch the current noise cancellation mode. The type of mode control signal can be one or more, and different mode control signals can have different signal levels. The mode control signal can control the active noise-canceling headphones to execute the corresponding noise cancellation mode, which can include noise cancellation mode, pass-through mode, normal mode, etc. Specifically, the voice control chip 13 can include an embedded voice recognition chip, a SOC integrated voice chip, or a standalone AI voice chip.

[0025] The user audio module 14 is used to receive ambient noise collected by the noise-canceling microphone 11, and to switch the signal processing circuit for processing ambient noise according to the mode control signal, and to send the noise-canceling signal generated by the signal processing circuit to the sound-generating unit 12; the sound-generating unit 12 is used to play the noise-canceling signal.

[0026] In this invention, the user audio module 14 refers to a combination of hardware and software and / or hardware modules responsible for processing user speech input and output audio. The user audio module 14 may include functions such as voice pickup, audio processing, sound playback, and noise reduction. The main functions of the user audio module 14 can be integrated into its main control chip or audio processing chip. The main control chip or audio processing chip may be configured with software algorithms that can implement the aforementioned functions. The sound-generating unit 12 is a device that plays sound within active noise-canceling headphones. The sound-generating unit 12 may include a dynamic sound-generating unit, a balanced armature sound-generating unit, or a silent sound-generating unit. For example, a dynamic sound-generating unit can generate a magnetic field by passing current through a voice coil, which interacts with a fixed magnet to drive the diaphragm to vibrate and produce sound. The voice coil is often a coil wound with wire. The number of turns and material of the voice coil are determined based on the sensitivity and power consumption of the active noise-canceling headphones. The voice coil can be made of copper or aluminum, while the diaphragm can be made of metal or bio-fiber. The balanced armature sound unit can drive the armature to vibrate through the drive rod, thereby driving the diaphragm to produce sound.

[0027] In this embodiment of the application, the noise-canceling microphone 11 can be disposed inside or outside the earphone cavity 15. The noise-canceling microphone 11 can collect ambient noise in the environment, which can exist in the form of analog signals or digital signals. The type of noise-canceling microphone 11 can be the same as or different from the type of main microphone 10.

[0028] Specifically, the noise-canceling microphone 11 can pick up ambient noise in the active noise-canceling environment and transmit the picked-up ambient noise to the user audio module 14. The user audio module 14 can process the ambient noise through signal processing circuitry. The signal processing circuitry for processing ambient noise within the user audio module 14 can include an amplification circuit for amplifying noise and a filtering circuit for filtering noise. Depending on the control signal for the mode of controlling ambient noise processing, the user audio module 14 can select different signal processing circuits to process the ambient noise. The principle of the signal processing circuitry for noise cancellation in the active noise-canceling headphones is to collect ambient noise in the environment through the noise-canceling microphone and quickly generate a sound wave with opposite phase to cancel the original noise. In this way, although the user's ear receives the original noise, it also receives the inverse sound wave used to cancel the noise. The two neutralize each other in the ear, achieving the noise cancellation effect.

[0029] In this embodiment, when the user audio module 14 receives a mode control signal, it can switch the signal processing circuit for ambient noise and use the signal processing circuit corresponding to the mode control signal to process the ambient noise. The signal processed by the signal processing circuit in the user audio module 14 can be recorded as a noise reduction signal, which can be transmitted by the user audio module 14 to the sound unit 12 for playback.

[0030] Based on the above-described embodiments, the noise-canceling microphone 11 includes at least one of an external microphone and an internal microphone; An external microphone is located outside the rear cavity of the earphone housing 15. The rear cavity is not used to fit into the user's ear canal, and the external microphone is used to collect external ambient noise. An internal microphone is located inside the fitting cavity of the earphone housing 15. The fitting cavity is used to fit the user's ear canal, and the internal microphone is used to collect residual noise in the user's ear canal.

[0031] In this embodiment, the noise-canceling microphone 11 in the active noise-canceling headphones may include an external microphone and / or an internal microphone. The external microphone can be located outside the headphone cavity 15, specifically at the rear end of the headphone cavity 15. This rear end cavity is a portion of the headphone cavity that is not used to fit the user's ear canal. This rear end cavity is exposed outside the user's ear canal when the user wears the active noise-canceling headphones. The external microphone located in the rear end cavity can collect ambient noise. The internal microphone can be located inside the headphone cavity 15, specifically at the fitting portion of the headphone cavity 15. This fitting portion extends into the user's ear canal when the user wears the active noise-canceling headphones. The internal microphone can collect residual noise within the user's ear canal, which can refer to noise waves within the ear canal. The aforementioned noise-canceling microphone 11 can collect both ambient noise and residual noise within the ear canal. The aforementioned noise can be used to generate inverse sound waves that cancel out the original noise. ANC headphones generally receive ambient noise through a front-facing microphone, i.e., an external microphone, and listen to and receive sound waves in the human ear through a rear-facing microphone, i.e., an internal microphone in this embodiment. After processing by a noise reduction chip and algorithm, sound waves with opposite phases and equal energy are formed. After superposition, the noise disappears, thereby achieving the filtering and elimination of ambient noise, making the human voice heard by the human ear clearer. In this embodiment, the noise reduction chip can be set in the user audio module provided in this embodiment.

[0032] In some embodiments, the mode control signal includes at least a noise reduction control signal, a pass-through control signal, and a normal control signal, and the signal levels of the noise reduction control signal, the pass-through control signal, and the normal control signal are different.

[0033] In this embodiment, the noise cancellation modes in the active noise-canceling headphones may include a noise cancellation mode, a pass-through mode, and a normal mode. A noise cancellation mode can refer to a mode where the active noise-canceling headphones generate an inverse sound wave from the picked-up noise, thereby canceling out ambient noise and achieving noise reduction. A pass-through mode can refer to a mode where the active noise-canceling headphones collect external sounds in real time and play them through the headphones, allowing the wearer to hear ambient sounds without removing the headphones. A normal mode can refer to a working mode where the active noise-canceling headphones do not perform active noise cancellation or ambient sound collection; in normal mode, the active noise-canceling headphones only operate with basic headphone functions. The voice control chip 13 can provide noise cancellation control signals, pass-through control signals, and normal control signals for the three noise cancellation modes of the active noise-canceling headphones, and the generated noise cancellation control signals, pass-through control signals, and normal control signals can have different signal levels. For example, taking a digital control signal as the mode control signal, the noise reduction control signal, the pass-through control signal, and the ordinary control signal all function as follows: when the mode control signal is high, it is a noise reduction control signal; when it is low, it is a pass-through control signal. As another example, taking an analog signal as the mode control signal, specifically a pulse width modulation (PWM) signal, when the duty cycle is 0%, it can be an ordinary control signal; when the duty cycle is 30%, it can be a pass-through control signal; and when the duty cycle is 80%, it can be a noise reduction control signal.

[0034] Based on the above-mentioned application embodiments, the signal processing circuit for processing ambient noise is switched according to the mode control signal: when the user audio module receives the noise reduction control signal, the signal processing circuit for processing ambient noise is switched to the noise reduction processing circuit; wherein, the noise reduction processing circuit includes at least a noise reduction processing module and a first signal processing path, the processing chip configured in the noise reduction processing module is used to filter the ambient noise, and the first signal processing path is used to mix the filtered ambient noise with the local audio.

[0035] In this embodiment, when the mode control signal is a noise reduction control signal, that is, when the user audio module 14 receives the mode control signal and determines that the mode control signal is a noise reduction control signal based on the signal level of the mode control signal, a noise reduction processing circuit can be used to process the ambient noise. The noise reduction processing circuit may include a noise reduction processing module and a first signal processing path. The noise reduction processing module may be configured with a processing chip, which is used to perform noise cancellation processing on the ambient noise. The processing chip may be configured with a program file that generates an inverse sound wave based on the ambient noise. The ambient noise can be filtered by the processing chip to generate the inverse sound wave corresponding to the ambient noise. The first signal processing path can be used to mix the filtered ambient noise, that is, the generated inverse sound wave, with the local audio to achieve noise reduction processing. The first signal processing path can be implemented by an adder circuit.

[0036] In other embodiments, the signal processing circuit for handling ambient noise is switched according to the mode control signal: When the user audio module receives the pass-through control signal, it switches the signal processing circuit for processing ambient noise to the pass-through processing circuit. The pass-through processing circuit includes at least a signal amplification circuit and a second signal processing path. The signal amplification circuit is used to amplify the ambient noise, and the second signal processing path is used to mix the amplified ambient noise with the local audio.

[0037] In this embodiment, when the mode control signal is a pass-through control signal, that is, when the user audio module 14 receives the mode control signal and determines that the mode control signal is a pass-through control signal based on the signal level of the mode control signal, a pass-through processing circuit can be used to pass through the ambient noise. This noise reduction processing circuit may include a signal amplification circuit and a second signal processing path. The signal amplification circuit is used to amplify the ambient noise signal and may include at least one of an operational amplifier circuit and an instrumentation amplifier circuit. The second signal processing path can be used to mix the ambient noise processed by the signal amplification circuit with the local audio to achieve noise reduction. The second signal processing path can also be implemented using an adder circuit.

[0038] In other embodiments, the signal processing circuit for handling ambient noise is switched according to the mode control signal: When the user audio module receives a normal control signal, it switches the signal processing circuit for handling ambient noise to a normal processing circuit. The normal processing circuit includes a microphone shutdown circuit and a local audio playback circuit. The microphone shutdown circuit is used to turn off the noise-canceling microphone from receiving ambient noise, and the local audio playback circuit is used to play local audio.

[0039] In this embodiment, when the mode control signal is a normal control signal, that is, when the user audio module 14 receives the mode control signal and determines that the mode control signal is a normal control signal based on the signal level of the mode control signal, a normal processing circuit can be used to process the ambient noise. The normal processing circuit may include a microphone shutdown circuit and a local audio playback circuit. The microphone shutdown circuit can trigger the noise-canceling microphone 11 to shut down, so that the noise-canceling microphone 11 no longer collects ambient noise, thereby reducing the power consumption of the active noise-canceling headphones. At the same time, local audio can be played directly through the local audio playback circuit without performing noise reduction or pass-through processing on the local audio.

[0040] It is understood that, in the embodiments of this application, the local audio processed by the signal processing circuit can also be collectively referred to as the noise-reduced signal.

[0041] In some application embodiments, Figure 2 This is a schematic diagram of the structure of a voice control chip according to an embodiment of the present invention. See also: Figure 2 The voice control chip 13 includes a signal acquisition module 1301, a processing engine module 1302, a storage module 1303, and a communication interface module 1304. The voice control chip 13 is used to convert a first signal into a mode control signal, including: the signal acquisition module 1301 is connected to the main microphone 10 and is used to acquire the first signal transmitted by the main microphone 10, wherein the first signal includes at least an analog signal; the processing engine module 1302 is configured with an audio processing program and converts the first signal received by the signal acquisition module 1301 into a mode control signal; the storage module 1303 is used to store the audio processing program configured in the processing engine module; and the communication interface module 1304 is used to transmit the mode control signal to the user audio module 14.

[0042] In this embodiment, the signal acquisition module 1301 within the voice control chip 13 may include at least a microphone interface, which can be connected to the main microphone 10 to receive the first signal acquired by the main microphone 10. The signal acquisition module 1301 may also include a PDM interface or an I2S interface for data interaction between the voice control chip 13 and the host computer. The processing engine module 1302 is responsible for signal processing and recognition of the first signal. Specifically, the processing engine module 1302 may be at least one of a digital signal processor, a microprocessor, or a neural network processor. The processing engine module 1302 can convert the first signal into a mode control signal through a configured audio processing program, which may include FFT algorithms, filtering algorithms, noise reduction algorithms, CNN algorithms, attention mechanism algorithms, etc. The audio processing program used by the processing engine module 1302 can be stored in the storage module 1303, which may include a read-only memory, random access memory, etc. The communication interface module 1304 is used to transmit mode control signals to the user audio module 14. The communication interface module 1304 may include an internal bus, an external interface, and an audio interface. The internal bus can connect to various modules inside the voice control chip 13; the external interface can be used to connect to external devices, such as external controllers, cloud servers, and main control units; and the audio interface can be used to output voice feedback or play audio. For example, the voice control chip 13 can output a noise reduction mode switching prompt tone through the audio interface.

[0043] Based on the above-described embodiments, the processing engine module 1302 includes at least one of a digital signal processor, a microprocessor, and a neural network processor.

[0044] In other embodiments, the voice control chip 13 includes at least one of a single-core architecture chip and a multi-core heterogeneous chip.

[0045] Based on the above-mentioned application embodiments, the user audio module further includes: a switch button, which is disposed on the outer surface of the earphone cavity, and is used to switch the signal processing circuit for processing ambient noise.

[0046] In this embodiment, the user audio module 14 may also be configured with a switching button, which may include a physical button or a virtual button. This switching button can trigger the switching of the signal processing circuit for handling ambient noise. The user can trigger the switching button by clicking, touching, or operating it. The switching button may be located on the outer surface of the earphone housing, thus facilitating manual operation of the active noise-canceling headphones by the user.

[0047] In one exemplary implementation, Figure 3This is a working example diagram of an active noise-canceling headphone according to an embodiment of the present invention. See also... Figure 3 Active noise-canceling headphones can be equipped with voice control functionality, allowing users to switch between noise-canceling, pass-through, and normal modes via voice commands. This eliminates the need for manual operation, making it convenient for users while cycling or driving and ensuring user safety. The active noise-canceling headphones consist of an external microphone 1101, an internal microphone 1102, a sound unit 12, a voice control chip 13, a user audio module 14, and an earphone cavity 15. The operation of the active noise-canceling headphones includes the following steps: 1. Picking up human voices through the main microphone. 2. Recognizing and processing human voices using the voice control chip 13 added to the active noise-canceling headphones. 3. The user audio module 14 automatically switches to the corresponding noise-canceling, pass-through, and normal modes based on the recognized information. This causes the sound unit 12 to generate noise-canceling, pass-through, and normal signals respectively, which are then superimposed with the music frequency signal to achieve noise reduction processing for the corresponding noise-canceling mode. This invention, based on voice control for switching between noise-canceling, pass-through, and normal modes of active noise-canceling headphones, makes it more convenient for users while ensuring personal safety.

[0048] In this embodiment of the application, the type of active noise-canceling headphones is not limited. Active noise-canceling headphones may include in-ear headphones, earbuds, over-ear headphones, ear-hook headphones, clip-on headphones, etc.

[0049] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0050] Computer programs used to implement the methods of this invention can be written in any combination of one or more programming languages. These computer programs can be provided to the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are performed. The computer programs can be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0051] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0052] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0053] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0054] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0055] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0056] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An active noise-canceling headphone, characterized in that, include: The device includes a main microphone, a noise-canceling microphone, a sound-generating unit, a voice control chip, a user audio module, and an earphone cavity. The main microphone is located at the bottom of the earphone cavity and is connected to the user audio module via the voice control chip. The user audio module is connected to both the sound-generating unit and the noise-canceling microphone. The main microphone is used to collect user voice, convert the user voice into a first signal, and transmit the first signal to the voice control chip; The voice control chip is used to convert the first signal into a mode control signal and transmit the generated mode control signal to the user audio module. The user audio module is used to receive ambient noise collected by the noise-canceling microphone, switch the signal processing circuit for processing the ambient noise according to the mode control signal, and send the noise-canceling signal generated by the signal processing circuit to the sound-generating unit. The sound-generating unit is used to play the noise-reduced signal.

2. The active noise-canceling headphones according to claim 1, characterized in that, The noise-canceling microphone includes at least one of an external microphone and an internal microphone; The external microphone is located outside the rear cavity of the earphone housing, wherein the rear cavity is not used to fit into the user's ear canal, and the external microphone is used to collect external ambient noise; The internal microphone is disposed inside the fitting cavity of the earphone cavity, wherein the fitting cavity is used to fit the user's ear canal, and the internal microphone is used to collect residual noise in the user's ear canal.

3. The active noise-canceling headphones according to claim 1, characterized in that, The mode control signal includes at least a noise reduction control signal, a pass-through control signal, and a normal control signal, and the signal levels of the noise reduction control signal, the pass-through control signal, and the normal control signal are different.

4. The active noise-canceling headphones according to claim 3, characterized in that, The signal processing circuit that switches to process the ambient noise according to the mode control signal: When the user audio module receives the noise reduction control signal, it switches the signal processing circuit that processes the ambient noise to the noise reduction processing circuit. The noise reduction processing circuit includes at least a noise reduction processing module and a first signal processing path. The processing chip configured in the noise reduction processing module is used to filter the ambient noise, and the first signal processing path is used to mix the filtered ambient noise with local audio.

5. The active noise-canceling headphones according to claim 3, characterized in that, The signal processing circuit that switches to process the ambient noise according to the mode control signal: When the user audio module receives the pass-through control signal, it switches the signal processing circuit that processes the ambient noise to the pass-through processing circuit. The pass-through processing circuit includes at least a signal amplification circuit and a second signal processing path. The signal amplification circuit is used to amplify the ambient noise, and the second signal processing path is used to mix the amplified ambient noise with local audio.

6. The active noise-canceling headphones according to claim 3, characterized in that, The signal processing circuit that switches to process the ambient noise according to the mode control signal: When the user audio module receives the normal control signal, it switches the signal processing circuit that processes the ambient noise to the normal processing circuit. The general processing circuit includes a microphone shutdown circuit and a local audio playback circuit. The microphone shutdown circuit is used to shut down the reception of ambient noise by the noise-canceling microphone, and the local audio playback circuit is used to play local audio.

7. The active noise-canceling headphones according to claim 1, characterized in that, The voice control chip includes a signal acquisition module, a processing engine module, a storage module, and a communication interface module. The voice control chip is used to convert the first signal into a mode control signal, including: The signal acquisition module is connected to the main microphone and is used to acquire the first signal transmitted by the main microphone, wherein the first signal includes at least an analog signal; The processing engine module is configured with an audio processing program, which converts the first signal received by the signal acquisition module into the mode control signal. The storage module is used to store the audio processing program configured in the processing engine module; The communication interface module is used to transmit the mode control signal to the user audio module.

8. The active noise-canceling headphones according to claim 7, characterized in that, The processing engine module includes at least one of a digital signal processor, a microprocessor, and a neural network processor.

9. The active noise-canceling headphones according to claim 7, characterized in that, The voice control chip includes at least one of the following: a single-core architecture chip and a multi-core heterogeneous chip.

10. The active noise-canceling headphones according to any one of claims 1, 3, 4, 5 or 6, characterized in that, The user audio module further includes a switch button, which is disposed on the outer surface of the earphone cavity and is used to switch the signal processing circuit for processing ambient noise.

Images