Microphone device, noise reduction method, device and electronic equipment thereof

Abstract

The embodiments of the present application provide a microphone device and a noise reduction method, device and electronic device thereof. The microphone device includes: a body, a front cover, a reference microphone assembly and a pickup microphone assembly; the body includes a body base and two groups of isolation structural members; the reference microphone assembly is fixedly arranged in a reference space; the reference space is composed of the front cover, a reference area on the body base and a group of isolation structural members corresponding to the reference area; the reference microphone assembly can collect noise signals within a preset range of the microphone device; the pickup microphone assembly is fixedly arranged in the sound pickup space; the sound pickup space is composed of the front cover, a sound pickup area on the body base and a group of isolation structural members corresponding to the sound pickup area; the sound pickup microphone assembly can collect noise signals; a sound input channel is provided at a preset position of the front cover; the sound input channel is used for the pickup microphone assembly to collect target sound signals outside the microphone device, thereby effectively eliminating noise signals generated when the microphone device is working.

Description

Technical Field

[0001] The present application relates to the field of audio, and in particular to a microphone device and a noise reduction method, apparatus, and electronic device thereof. Background Art

[0002] Microphones, scientifically known as microphones, are derived from the English word "microphone" and are also called microphones or micro-sound devices. During use, microphones may collect noise signals in addition to the desired sound signal. This noise signal originates partly from the external environment and partly from the unstable movement of individual components within the microphone during operation. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a microphone device and a noise reduction method, apparatus and electronic device thereof, so as to solve the problem of how to eliminate the noise signal generated when the microphone device is working.

[0004] To solve the above technical problems, the embodiments of the present application are implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a microphone device, the microphone device comprising:

[0006] Body, front cover, reference microphone assembly and pickup microphone assembly; including:

[0007] The fuselage includes a fuselage base and two sets of isolation structural members;

[0008] The reference microphone assembly is fixedly arranged in a reference space; the reference space is composed of the front cover, the reference area on the fuselage base, and a group of isolation structural members corresponding to the reference area;

[0009] The reference microphone assembly can collect noise signals within a preset range of the microphone device;

[0010] The sound pickup microphone assembly is fixedly arranged in the sound pickup space; the sound pickup space is composed of the front cover, the sound pickup area on the body base, and a group of isolation structural members corresponding to the sound pickup area;

[0011] The pickup microphone assembly can collect the noise signal;

[0012] A sound inlet channel is provided at a preset position of the front cover; the preset position is opposite to the sound pickup area; the sound inlet channel is used for the sound pickup microphone assembly to collect target sound signals outside the microphone device.

[0013] In a second aspect, an embodiment of the present application provides a noise reduction method for a microphone device, which is applied to the microphone device as described in the first aspect, and the method includes:

[0014] The reference microphone assembly collects a noise signal within a preset range of the microphone device; the sound pickup microphone assembly collects the noise signal and a target sound signal outside the microphone device to obtain a mixed sound signal composed of the noise signal and the target sound signal;

[0015] The mixed sound signal is subjected to noise reduction processing according to the noise signal to obtain a noise-reduced sound signal.

[0016] In a third aspect, an embodiment of the present application provides a noise reduction device for a microphone device, comprising:

[0017] The processor is configured to collect a noise signal within a preset range of the microphone device via the reference microphone assembly; collect the noise signal within the microphone device and a target sound signal outside the microphone device via the sound pickup microphone assembly to obtain a mixed sound signal composed of the noise signal and the target sound signal; and perform noise reduction processing on the mixed sound signal based on the noise signal to obtain a noise-reduced sound signal.

[0018] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: a processor, and a memory electrically connected to the processor; the memory stores a computer program, and the processor is used to call and execute the computer program from the memory to implement the steps of the noise reduction method of the microphone device described in the second aspect above.

[0019] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the noise reduction method for the microphone device described in the second aspect are implemented.

[0020] In an embodiment of the present application, a microphone device includes: a body, a front cover, a reference microphone assembly, and a pickup microphone assembly; the body includes a body base and two sets of isolation structures; the reference microphone assembly is fixedly disposed in a reference space; the reference space is formed by the front cover, a reference area on the body base, and a set of isolation structures corresponding to the reference area; the reference microphone assembly is capable of collecting noise signals within a preset range of the microphone device; the pickup microphone assembly is fixedly disposed in the sound pickup space; the sound pickup space is formed by the front cover, a sound pickup area on the body base, and a set of isolation structures corresponding to the sound pickup area; the pickup microphone assembly is capable of collecting noise signals; a sound inlet channel is provided at a preset position of the front cover; the preset position is opposite the sound pickup area; the sound inlet channel is used for the pickup microphone assembly to collect target sound signals outside the microphone device, thereby enabling the reference microphone assembly to collect noise signals, and the pickup microphone assembly to collect a mixed sound signal composed of the noise signal and the target sound signal, wherein the noise signals collected by the reference microphone assembly and the pickup microphone assembly are identical. Furthermore, noise reduction of the mixed sound signal based on the noise signal can effectively eliminate noise signals generated during operation of the microphone device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 A schematic diagram of a first structure of a microphone device provided in an embodiment of this specification;

[0023] Figure 2 A second structural diagram of a microphone device provided in an embodiment of this specification;

[0024] Figure 3 A schematic diagram of the circuit structure of a first signal amplifying circuit in a microphone device provided in an embodiment of this specification;

[0025] Figure 4 A schematic diagram of the noise reduction working principle of a microphone device provided in an embodiment of this specification;

[0026] Figure 5 A flowchart of a noise reduction method for a microphone device provided in an embodiment of this specification;

[0027] Figure 6 A schematic diagram of the module composition of a noise reduction device for a microphone device provided in an embodiment of this specification;

[0028] Figure 7 This is a schematic diagram of the composition of an electronic device provided in an embodiment of this specification. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0030] Figure 1 This is a schematic diagram of the first structure of a microphone device provided in an embodiment of this specification.

[0031] like Figure 1 As shown, the microphone device includes: a body, a front cover 101, a reference microphone assembly 102 and a pickup microphone assembly 103; wherein: the body includes a body base 104 and two groups of isolation structural members 105; the reference microphone assembly 102 is fixedly arranged in a reference space; the reference space is composed of the front cover 101, a reference area on the body base 104, and a group of isolation structural members 105 corresponding to the reference area; the reference microphone assembly 102 can collect noise signals within a preset range of the microphone device; the pickup microphone assembly 103 is fixedly arranged in the sound pickup space; the sound pickup space is composed of the front cover 101, a sound pickup area on the body base 104, and a group of isolation structural members 105 corresponding to the sound pickup area; the sound pickup microphone assembly 103 can collect noise signals; a sound inlet channel 106 is provided at a preset position of the front cover 101; the preset position is opposite to the sound pickup area; the sound inlet channel 106 is used for the sound pickup microphone assembly 103 to collect target sound signals outside the microphone device.

[0032] The body of the microphone device may be a main structural component of the microphone device. The front cover 101 may be a shell on one side of the microphone device. The body and the front cover 101 are connected to form the basic hardware frame structure of the microphone device.

[0033] The reference microphone assembly 102 may be an energy conversion device capable of converting a received sound signal into an electrical signal, such as an electret condenser microphone, a silicon crystal microphone, or other types of microphone devices.

[0034] The reference microphone assembly 102 may be an energy conversion device used as a reference object for the pickup microphone assembly 103. Specifically, the sound signal collected by the reference microphone assembly 102 may serve as a reference object for the sound signal collected by the pickup microphone assembly 103.

[0035] The pickup microphone assembly 103 may be an energy conversion device capable of converting a received sound signal into an electrical signal, for example, an electret condenser microphone, a silicon crystal microphone, or other types of microphones.

[0036] Sound pickup is the process of collecting sound. This includes, but is not limited to, individual sound pickup, harmonic vocal pickup, chorus pickup, and instrument pickup. The pickup microphone assembly 103 can be the primary energy conversion device within the microphone device, responsible for collecting target sound signals outside the microphone device and converting them into electrical signals. The target sound signal can be a valid sound signal that the user desires the microphone device to capture, such as a human voice signal or an instrumental sound signal.

[0037] The energy conversion devices used in the reference microphone assembly 102 and the pickup microphone assembly 103 can be electronic devices of exactly the same type and structure.

[0038] The fuselage includes a fuselage base 104 and two groups of isolation structural members 105 .

[0039] The body base 104 may be a base component for supporting the reference microphone assembly 102 and the pickup microphone assembly 103 .

[0040] Among the two groups of isolation structural members 105 included in the fuselage, one group of isolation structural members 105 may be a plurality of isolation structural members surrounding the reference microphone assembly 102 ; the other group of isolation structural members 105 may be a plurality of isolation structural members surrounding the pickup microphone assembly 103 .

[0041] A set of isolation structures 105 surrounding the reference microphone assembly 102 corresponds to the reference area on the fuselage base 104. For example, the set of isolation structures 105 surrounding the reference microphone assembly 102 may include four isolation structures 105, and the four sides of the reference area are respectively connected to the four isolation structures.

[0042] A set of isolation structures 105 surrounding the pickup microphone assembly 103 corresponds to the sound pickup area on the body base 104. For example, the set of isolation structures 105 surrounding the pickup microphone assembly 103 may include four isolation structures, and the four sides of the sound pickup area are respectively connected to the four isolation structures.

[0043] like Figure 1 As shown, the two groups of isolation structures 105 can share the same isolation structure 105. For example, an isolation structure 105 located on the right side of the reference microphone assembly 102 in the group of isolation structures 105 surrounding the pickup microphone assembly 103 and an isolation structure 105 located on the left side of the pickup microphone assembly 103 in the group of isolation structures 105 surrounding the pickup microphone assembly 103 can be the same isolation structure 105.

[0044] For example, the reference area on the body base 104 can be located directly below the reference microphone assembly 102; the four isolation structures surrounding the reference microphone assembly 102 can be located in the front, back, left, and right directions of the reference microphone assembly 102; and the front cover 101 can be located directly above the reference microphone assembly 102. The front cover 101, the reference area on the body base 104, and the set of isolation structures 105 corresponding to the reference area can collectively constitute a reference space.

[0045] The reference microphone assembly 102 may be fixedly disposed in the reference space.

[0046] The reference microphone assembly 102 can collect noise signals within a preset range of the microphone device. The preset range can be pre-set according to the volume of the microphone device.

[0047] The microphone device may also include a motor, a speaker assembly, and other unlisted electronic components. When the microphone device is operating, the motor may rotate. This motor rotation is an unsteady motion and may generate corresponding vibration noise. This vibration noise can be transmitted between the various components of the microphone device. When the microphone device is operating, the speaker assembly may play audio data. When playing audio data, the speaker assembly performs unsteady motion and may generate corresponding vibration noise. This vibration noise can be transmitted between the various components of the microphone device.

[0048] The noise signal within the preset range of the microphone device may be vibration noise transmitted between various structural components in the microphone device. The source of the vibration noise may be a rotating motor, a speaker assembly when playing audio data, or other structural components in the microphone device that are in working condition.

[0049] For example, the sound pickup area on the body base 104 can be located directly below the sound pickup microphone assembly 103; the four isolation structures surrounding the sound pickup microphone assembly 103 can be located in the front, back, left, and right directions of the sound pickup microphone assembly 103; and the front cover 101 can be located directly above the sound pickup microphone assembly 103. The front cover 101, the sound pickup area on the body base 104, and the set of isolation structures 105 corresponding to the sound pickup area can collectively form a sound pickup space.

[0050] The sound pickup microphone assembly 103 can be fixedly disposed in the sound pickup space.

[0051] The pickup microphone assembly 103 can collect noise signals within a preset range of the microphone device. Both the pickup microphone assembly 103 and the reference microphone assembly 102 are located within the microphone device, and the distance between the pickup microphone assembly 103 and the reference microphone assembly 102 is less than or equal to a preset distance threshold. Therefore, the noise signals collected by the pickup microphone assembly 103 and the reference microphone assembly 102 within the preset range of the microphone device can be considered to be identical noise signals.

[0052] like Figure 1 As shown, the area of ​​the front cover 101 is larger than the sum of the areas of the reference area and the sound pickup area.

[0053] like Figure 1 As shown, a sound inlet channel 106 is provided at a preset position of the front cover 101; the preset position is opposite to the sound pickup area; the sound inlet channel 106 is used for the sound pickup microphone assembly 103 to collect target sound signals outside the microphone device.

[0054] like Figure 1 As shown, the reference space formed by the front cover 101, the reference area on the body base 104, and the set of isolation structures 105 corresponding to the reference area can be considered a closed space. The front cover 101 can be made of a material with good sound insulation properties, so that the reference microphone assembly located in the reference space cannot collect target sound signals outside the microphone device.

[0055] like Figure 1 As shown, since the preset position of the front cover 101 is provided with a sound input channel 106, and the preset position is opposite to the sound pickup area, the sound pickup space composed of the front cover 101, the sound pickup area on the body base 104 and a group of isolation structural members 105 corresponding to the sound pickup area can be regarded as a non-closed space, and the sound pickup microphone assembly 103 located in the sound pickup space can collect target sound signals outside the microphone device through the sound input channel 106.

[0056] The difference between the reference space and the sound pickup space is that: in the partial area of ​​the front cover 101 used to form the reference space, no channels or holes are set, so that the reference space can be regarded as a closed space. Therefore, the reference microphone assembly 102 located in the reference space can collect noise signals but cannot collect target sound signals; and in the partial area of ​​the front cover 101 used to form the sound pickup space, an audio input channel 106 is set at a preset position, so that the sound pickup space can be regarded as a non-closed space. Therefore, the sound pickup microphone assembly 103 located in the sound pickup space can collect noise signals and target sound signals.

[0057] It should also be noted that the pickup microphone assembly 103 can simultaneously collect the noise signal and the target sound signal. The pickup microphone assembly 103 cannot collect the two signals separately, but instead collects a mixed sound signal composed of the noise signal and the target sound signal. The noise signal collected by the reference microphone assembly 102 can serve as a reference for the mixed sound signal collected by the pickup microphone assembly 103.

[0058] Optionally, the noise signal includes: a first vibration noise signal generated when the motor in the microphone device is working and / or a second vibration noise signal generated when the speaker assembly in the microphone device plays audio data; the target sound signal outside the microphone device includes: a human voice signal to be collected.

[0059] For example, the noise signal can be a first vibration noise signal generated by the operation of a motor in the microphone device, a second vibration noise signal generated by the speaker assembly in the microphone device when playing audio data, or a mixed vibration noise signal composed of the first and second vibration noise signals. The target sound signal can be a human voice signal that the user wishes to capture, a musical instrument sound signal that the user wishes to capture, or any other desired sound signal.

[0060] Optionally, the microphone device further includes a first filling piece and a second filling piece; the reference microphone assembly is fixedly arranged in the reference space through the first filling piece; and the pickup microphone assembly is fixedly arranged in the pickup space through the second filling piece.

[0061] The first filling member includes one or more of the following: foam, rubber sleeve, and interference structure located in the reference space. The first filling member may also include other filling structures or filling materials.

[0062] The second filling member includes one or more of the following: foam, rubber sleeve, and interference structure located in the sound pickup space. The second filling member may also include other filling structures or filling materials.

[0063] It should be noted that the first filling piece and the second filling piece have the same structure and are made of the same material.

[0064] The materials used for the front cover 101, reference microphone assembly 102, and pickup microphone assembly 103 are relatively hard, potentially creating significant gaps when the front cover 101 is connected to the reference microphone assembly 102, or when the front cover 101 is connected to the pickup microphone assembly 103. The interference structure can serve as a buffer between the front cover 101 and the reference microphone assembly 102, or between the front cover 101 and the pickup microphone assembly 103. The interference structure can be made of rubber. By providing this interference structure, the front cover 101 can be pressed tightly against the body, eliminating gaps and improving the sound insulation between the reference and pickup spaces.

[0065] The following can be combined Figure 2 , specifically describing how the reference microphone assembly 102 is fixedly disposed in the reference space through the first filling piece, and how the pickup microphone assembly is fixedly disposed in the pickup space through the second filling piece.

[0066] Figure 2 This is a second structural diagram of a microphone device provided in an embodiment of this specification.

[0067] like Figure 2 As shown, the space between the reference microphone assembly 102 and the body base 104 can be filled with foam 109; the space between the reference microphone assembly 102 and the isolation structure 105 can be filled with a rubber sleeve 107; and the space between the reference microphone assembly 102 and the front cover 101 can be filled with the rubber sleeve 107 and an interference structure 108, wherein the interference structure 108 can be connected to the front cover 101 and the rubber sleeve 107, respectively. By providing the foam 109, the rubber sleeve 107, and the interference structure 108 to fill the space outside the reference microphone assembly 102 within the reference space, the reference microphone assembly 102 can be fixedly disposed within the reference space.

[0068] The sound pickup space is similar to the reference space. For details, please refer to the corresponding section of the reference space. By providing foam 109, rubber sleeve 107, and interference structure 108 to fill the space outside the pickup microphone assembly 103 within the sound pickup space, the pickup microphone assembly 103 can be fixedly placed within the sound pickup space.

[0069] Optionally, the microphone device also includes: a first signal amplification circuit and a second signal amplification circuit with the same circuit structure; a reference microphone component 102, connected to the first signal amplification circuit, collecting a noise signal, converting the noise signal into a first voltage signal and transmitting it to the first signal amplification circuit; the first signal amplification circuit, used to amplify the first voltage signal; a pickup microphone component 103, connected to the second signal amplification circuit, collecting a noise signal and a target sound signal to obtain a mixed sound signal; converting the mixed sound signal into a second voltage signal and transmitting it to the second signal amplification circuit; the second signal amplification circuit, used to amplify the second voltage signal.

[0070] The reference microphone assembly 102 is connected to the first signal amplifying circuit. The reference microphone assembly 102 can collect a noise signal, convert the noise signal into a first voltage signal, and send the first voltage signal to the connected first signal amplifying circuit.

[0071] The first signal amplifying circuit can be used to receive a first voltage signal, amplify the first voltage signal by N times according to a preset amplification factor N (N is a natural number greater than 0), and output the first voltage signal amplified by N times.

[0072] The first signal amplifying circuit can be any voltage signal amplifying circuit that can be used to amplify the received voltage signal. For example, the circuit structure can refer to Figure 3 . Figure 3 This is a schematic diagram of the circuit structure of a first signal amplifying circuit in a microphone device provided in an embodiment of this specification.

[0073] like Figure 3 As shown, the input end of the first signal amplifying circuit is connected to the first end of the first resistor 302; the second end of the first resistor 302 is connected to the negative input end of the operational amplifier 301; the second end of the first resistor 302 is also connected to the first end of the second resistor 303; the second end of the second resistor 303 is connected to the output end of the operational amplifier; the output end of the operational amplifier is connected to the output end of the first signal amplifying circuit; the positive input end of the operational amplifier 301 is connected to the first end of the third resistor 304; and the second end of the third resistor 304 is grounded.

[0074] The first resistor 302 and the third resistor 304 have the same resistance value. The ratio of the resistance value of the second resistor 303 to the resistance value of the first resistor 302 can be set according to the preset amplification factor of the first signal amplification circuit. For example, if the resistance value of the first resistor 302 is set to x ohms and the preset amplification factor is 10, the resistance value of the second resistor 303 can be set to 10x ohms, and the resistance value of the third resistor 304 can be set to x ohms.

[0075] Figure 3 This is merely an example of a relatively simple structure of the first signal amplifying circuit and does not constitute a structural limitation on the first signal amplifying circuit. The first signal amplifying circuit may also use other electronic devices and / or circuit structures to amplify the received voltage signal.

[0076] The pickup microphone assembly 103 is connected to the second signal amplification circuit. The pickup microphone assembly 103 can collect a mixed sound signal composed of a noise signal and a target sound signal, convert the mixed sound signal into a second voltage signal, and send the second voltage signal to the connected second signal amplification circuit.

[0077] The second signal amplifying circuit can be used to receive the second voltage signal, amplify the second voltage signal by N times according to a preset amplification factor N (N is a natural number greater than 0), and output the second voltage signal amplified by N times.

[0078] The second signal amplifying circuit may be any voltage signal amplifying circuit that can be used to amplify a received voltage signal.

[0079] The first signal amplifying circuit and the second signal amplifying circuit have the same circuit structure, adopt the same electronic components, and have the same preset amplification factor N.

[0080] Optionally, the microphone device also includes: a dual-channel analog-to-digital conversion module; a first signal amplification circuit, connected to the first channel of the dual-channel analog-to-digital conversion module, sending the amplified first voltage signal to the first channel, so that the dual-channel analog-to-digital conversion module converts the amplified first voltage signal into a noise digital signal; a second signal amplification circuit, connected to the second channel of the dual-channel analog-to-digital conversion module, sending the amplified second voltage signal to the second channel, so that the dual-channel analog-to-digital conversion module converts the amplified second voltage signal into a mixed digital signal.

[0081] Analog to Digital Converters (ADCs) convert received analog signals into digital signals. Voltage signals are analog signals. A digital signal can be a binary string consisting of 0s and / or 1s. A dual-channel ADC can include a first channel and a second channel, allowing for two separate analog-to-digital conversion processes.

[0082] The first signal amplification circuit is connected to the first channel of the dual-channel ADC and transmits the amplified first voltage signal to the first channel, so that the dual-channel ADC converts the amplified first voltage signal into a noisy digital signal. The second signal amplification circuit is connected to the second channel of the dual-channel ADC and transmits the amplified second voltage signal to the second channel, so that the dual-channel ADC converts the amplified second voltage signal into a mixed digital signal. The dual-channel ADC can process the conversion of the amplified first voltage signal into a noisy digital signal and the conversion of the amplified second voltage signal into a mixed digital signal in parallel, and the two different analog-to-digital conversion processes do not interfere with each other.

[0083] The following can be combined Figure 4 Describe in detail how noise reduction works on microphone devices.

[0084] Figure 4 A schematic diagram of the noise reduction working principle of a microphone device provided in an embodiment of this specification.

[0085] like Figure 4 As shown, the target sound signal may be an effective human voice. The reference microphone assembly collects the noise signal, and the pickup microphone assembly collects the noise signal and the effective human voice at the same time.

[0086] The reference microphone assembly converts the collected noise signal into a first voltage signal, amplifies it, and sends the amplified first voltage signal to the ADC. The pickup microphone assembly converts the collected mixed sound signal (a mixture of the noise signal and the effective human voice) into a second voltage signal, amplifies it, and sends the amplified second voltage signal to the ADC. The ADC can be a dual-channel ADC or an ADC group consisting of two independently operating ADCs.

[0087] The ADC can output a noise digital signal converted from the amplified first voltage signal and a mixed digital signal converted from the amplified second voltage signal to a processor of the microphone device. The mixed digital signal can be a digital signal corresponding to a mixed sound signal composed of a noise signal and a valid human voice signal.

[0088] The noise digital signal may be a binary string consisting of 0 and / or 1; the mixed digital signal may be another binary string consisting of 0 and / or 1.

[0089] The processor can calculate the difference between the mixed digital signal and the noise digital signal, thereby calculating the digital signal corresponding to the effective human voice. This digital signal is the sound signal after noise reduction processing that the user expects.

[0090] In such Figure 1 In the illustrated embodiment, the microphone device includes: a body, a front cover, a reference microphone assembly, and a pickup microphone assembly; the body includes a body base and two sets of isolation structures; the reference microphone assembly is fixedly disposed in a reference space; the reference space is formed by the front cover, a reference area on the body base, and a set of isolation structures corresponding to the reference area; the reference microphone assembly can collect noise signals within a preset range of the microphone device; the pickup microphone assembly is fixedly disposed in the sound pickup space; the sound pickup space is formed by the front cover, a sound pickup area on the body base, and a set of isolation structures corresponding to the sound pickup area; the pickup microphone assembly can collect noise signals; a sound inlet channel is provided at a preset position of the front cover; the preset position is opposite the sound pickup area; the sound inlet channel is used for the pickup microphone assembly to collect target sound signals outside the microphone device, thereby enabling the reference microphone assembly to collect noise signals, and the pickup microphone assembly to collect a mixed sound signal composed of the noise signal and the target sound signal. The noise signals collected by the reference microphone assembly and the pickup microphone assembly are identical. Furthermore, noise reduction of the mixed sound signal based on the noise signal can effectively eliminate noise signals generated during operation of the microphone device.

[0091] Based on the same technical concept, one or more embodiments of this specification also provide a noise reduction method for a microphone device. Figure 5 A flowchart of a noise reduction method for a microphone device provided in an embodiment of this specification.

[0092] The execution subject of the noise reduction method of the microphone device may be a processor of the microphone device.

[0093] In step 502, a noise signal within a preset range of the microphone device is collected by a reference microphone assembly; and a noise signal within the microphone device and a target sound signal outside the microphone device are collected by a sound pickup microphone assembly to obtain a mixed sound signal composed of the noise signal and the target sound signal.

[0094] The processor of the microphone device can control the reference microphone assembly to collect noise signals within a preset range of the microphone device; it can also control the pickup microphone assembly to collect noise signals within the microphone device and target sound signals outside the microphone device, thereby obtaining a mixed sound signal composed of the noise signal and the target sound signal.

[0095] At the same time point, the noise signals within the preset range of the microphone device are the same.

[0096] Step 504 : performing noise reduction processing on the mixed sound signal according to the noise signal to obtain a noise-reduced sound signal.

[0097] The processor of the microphone device can perform noise reduction processing on the mixed sound signal according to the noise signal to obtain a sound signal after noise reduction processing.

[0098] Optionally, the microphone device also includes: a dual-channel analog-to-digital conversion module, and a first signal amplification circuit and a second signal amplification circuit with the same circuit structure; according to the noise signal, the mixed sound signal is subjected to noise reduction processing to obtain a sound signal after noise reduction processing, including: converting the noise signal into a first voltage signal through a reference microphone component; converting the mixed sound signal into a second voltage signal through a pickup microphone component; amplifying the first voltage signal through the first signal amplification circuit; amplifying the second voltage signal through the second signal amplification circuit; converting the amplified first voltage signal and the amplified second voltage signal into a noise digital signal and a mixed digital signal respectively through the dual-channel analog-to-digital conversion module; taking the difference between the mixed digital signal and the noise digital signal to calculate the target digital signal, and determining the target digital signal as the sound signal after noise reduction processing.

[0099] In addition, for Figure 5As for the embodiment of the noise reduction method of the microphone device shown, since it is basically similar to the aforementioned embodiment of the microphone device, the description is relatively simple, and the relevant parts can be referred to the partial description of the aforementioned embodiment of the microphone device.

[0100] Based on the same technical concept, one or more embodiments of this specification further provide a noise reduction device for a microphone device. Figure 6 A schematic diagram of the module composition of a noise reduction device for a microphone device provided in an embodiment of this specification is shown as follows: Figure 6 As shown, the device includes:

[0101] Processor 601 is configured to collect a noise signal within a preset range of the microphone device via a reference microphone assembly; collect the noise signal within the microphone device and a target sound signal outside the microphone device via the sound pickup microphone assembly to obtain a mixed sound signal composed of the noise signal and the target sound signal; and perform noise reduction processing on the mixed sound signal based on the noise signal to obtain a noise-reduced sound signal.

[0102] Optionally, the processor 601 is used to: perform noise reduction processing on the mixed sound signal according to the noise signal to obtain the sound signal after noise reduction processing, including: converting the noise signal into a first voltage signal through a reference microphone component; converting the mixed sound signal into a second voltage signal through a pickup microphone component; amplifying the first voltage signal through a first signal amplification circuit; amplifying the second voltage signal through a second signal amplification circuit; converting the amplified first voltage signal and the amplified second voltage signal into a noise digital signal and a mixed digital signal respectively through a dual-channel analog-to-digital conversion module; taking the difference between the mixed digital signal and the noise digital signal to calculate the target digital signal, and determining the target digital signal as the sound signal after noise reduction processing.

[0103] The noise reduction device of the microphone device provided in the embodiment of the present application includes: a body, a front cover, a reference microphone assembly and a pickup microphone assembly; the body includes a body base and two groups of isolation structures; the reference microphone assembly is fixedly arranged in a reference space; the reference space is composed of the front cover, a reference area on the body base and a group of isolation structures corresponding to the reference area; the reference microphone assembly can collect noise signals within a preset range of the microphone device; the pickup microphone assembly is fixedly arranged in the pickup space; the pickup space is composed of the front cover, a pickup area on the body base and a group of isolation structures corresponding to the pickup area The sound pickup microphone assembly is composed of a plurality of components; the sound pickup microphone assembly can collect noise signals; a sound inlet channel is provided at a preset position of the front cover; the preset position is opposite to the sound pickup area; the sound inlet channel is used for the sound pickup microphone assembly to collect target sound signals outside the microphone device, thereby collecting the noise signal through the reference microphone assembly, and obtaining a mixed sound signal composed of the noise signal and the target sound signal through the sound pickup microphone assembly, and the noise signals collected by the reference microphone assembly and the sound pickup microphone assembly are the same, and then, the mixed sound signal is reduced according to the noise signal, which can effectively eliminate the noise signal generated when the microphone device is working.

[0104] In addition, the above-mentioned embodiment of the noise reduction device for a microphone device is generally similar to the embodiment of the noise reduction method for a microphone device, so the description is relatively simple. For relevant details, please refer to the partial description of the embodiment of the noise reduction method for a microphone device. Furthermore, it should be noted that the various components of the noise reduction device for a microphone device of the present invention are logically divided according to the functions to be implemented. However, the present invention is not limited to this, and the various components can be re-divided or combined as needed.

[0105] Based on the same technical concept, the embodiment of the present application also provides an electronic device, such as Figure 7 shown. Figure 7 This is a schematic diagram of the structure of an electronic device provided in one embodiment of the present invention. Figure 7 , the electronic device includes a processor, an internal bus, a network interface, a memory and a non-volatile memory, and of course may also include hardware required for other services. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it, forming a noise reduction device for the microphone device at the logical level. Of course, in addition to software implementation, this application does not exclude other implementation methods, such as logic devices or a combination of software and hardware, etc., that is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0106] The network interface, processor, and memory can be connected to each other through a bus system. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0107] The memory is used to store programs. Specifically, the program may include program code, which includes computer operating instructions. The memory may include read-only memory and random access memory, and provides instructions and data to the processor. The memory may include high-speed random access memory (RAM) and may also include non-volatile memory (non-volatile memory), such as at least one disk storage device.

[0108] The processor is used to execute the program stored in the memory and specifically perform the following:

[0109] The reference microphone assembly collects a noise signal within a preset range of the microphone device; the pickup microphone assembly collects the noise signal and a target sound signal outside the microphone device to obtain a mixed sound signal composed of the noise signal and the target sound signal;

[0110] According to the noise signal, the mixed sound signal is subjected to noise reduction processing to obtain a noise-reduced sound signal.

[0111] The above application Figure 5The noise reduction method for a microphone device, as disclosed in the illustrated embodiment and performed by the noise reduction device of the microphone device, can also be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in the processor or by software instructions. The above processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be an audio processing device (digital signal processor, DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the noise reduction method for a microphone device disclosed in the embodiments of this application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the noise reduction method for the microphone device.

[0112] Based on the same technical concept, an embodiment of the present application also provides a computer-readable storage medium, which stores one or more programs. When the one or more programs are executed by an electronic device including multiple applications, the electronic device executes the noise reduction method of the microphone device provided by the aforementioned method embodiment.

[0113] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0114] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0115] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0116] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0117] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0118] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0119] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0120] Memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

[0121] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0122] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0123] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0124] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A microphone device, characterized in that: include: Body, front cover, first filler, second filler, reference microphone assembly, and pickup microphone assembly; wherein: The fuselage includes a fuselage base and two sets of isolation structural members; The first filler includes an interference structure that serves as a buffer structure between the front cover and the reference microphone assembly; the second filler includes an interference structure that serves as a buffer structure between the front cover and the pickup microphone assembly; the interference structure of the first filler and the interference structure of the second filler tightly press the front cover and the body without leaving any gaps; The reference microphone assembly is fixedly disposed within the reference space via the first filling member. The reference space is composed of the front cover, a reference area on the base of the fuselage, and a set of isolation structural members corresponding to the reference area. No channels or holes are provided in the portion of the front cover forming the reference space, so that the reference space is considered a closed space. The reference microphone assembly can collect noise signals within a preset range of the microphone device, and the front cover is made of a material with sound insulation performance, so that the reference microphone assembly located in the reference space cannot collect target sound signals outside the microphone device; The sound pickup microphone assembly is fixedly disposed in a sound pickup space by the second filling member; the sound pickup space is composed of the front cover, a sound pickup area on the body base, and a group of isolation structural members corresponding to the sound pickup area; and the distance between the sound pickup microphone assembly and the reference microphone assembly is less than or equal to a preset distance threshold; The pickup microphone assembly can collect the noise signal; In a partial area of ​​the front cover used to form the sound pickup space, a sound input channel is provided at a preset position, so that the sound pickup space is regarded as a non-closed space; the preset position is opposite to the sound pickup area; the sound input channel is used for the sound pickup microphone assembly to collect target sound signals outside the microphone device.

2. The microphone device according to claim 1, wherein Also includes: A first signal amplifying circuit and a second signal amplifying circuit having the same circuit structure; The reference microphone assembly is connected to the first signal amplifying circuit, collects the noise signal, converts the noise signal into a first voltage signal, and transmits the first voltage signal to the first signal amplifying circuit; The first signal amplifying circuit is used to amplify the first voltage signal; The sound pickup microphone assembly is connected to the second signal amplifying circuit to collect the noise signal and the target sound signal to obtain a mixed sound signal; converting the mixed sound signal into a second voltage signal and transmitting the second voltage signal to the second signal amplifying circuit; The second signal amplifying circuit is used to amplify the second voltage signal.

3. The microphone device according to claim 2, wherein Also includes: Dual-channel analog-to-digital conversion module; The first signal amplifying circuit is connected to the first channel of the dual-channel analog-to-digital conversion module and sends the amplified first voltage signal to the first channel, so that the dual-channel analog-to-digital conversion module converts the amplified first voltage signal into a noise digital signal; The second signal amplifying circuit is connected to the second channel of the dual-channel analog-to-digital conversion module and sends the amplified second voltage signal to the second channel so that the dual-channel analog-to-digital conversion module converts the amplified second voltage signal into a mixed digital signal.

4. The microphone device according to any one of claims 1 to 3, characterized in that: The noise signal includes: a first vibration noise signal generated when the motor in the microphone device is working and / or a second vibration noise signal generated when the speaker assembly in the microphone device plays audio data; the target sound signal outside the microphone device includes: a human voice signal to be collected.

5. A noise reduction method for a microphone device, characterized in that: A microphone device according to any one of claims 1 to 4, comprising: The reference microphone assembly collects a noise signal within a preset range of the microphone device; the sound pickup microphone assembly collects the noise signal and a target sound signal outside the microphone device to obtain a mixed sound signal composed of the noise signal and the target sound signal; The mixed sound signal is subjected to noise reduction processing according to the noise signal to obtain a noise-reduced sound signal.

6. The method according to claim 5, characterized in that The microphone device further includes: a dual-channel analog-to-digital conversion module, and a first signal amplification circuit and a second signal amplification circuit having the same circuit structure; performing noise reduction processing on the mixed sound signal according to the noise signal to obtain a noise-reduced sound signal, including: The noise signal is converted into a first voltage signal by the reference microphone component; the mixed sound signal is converted into a second voltage signal by the pickup microphone component; amplifying the first voltage signal through the first signal amplifying circuit; amplifying the second voltage signal through the second signal amplifying circuit; The amplified first voltage signal and the amplified second voltage signal are converted into a noise digital signal and a mixed digital signal respectively by the dual-channel analog-to-digital conversion module; A target digital signal is obtained by calculating a difference between the mixed digital signal and the noise digital signal, and the target digital signal is determined as the sound signal after the noise reduction processing.

7. A noise reduction device for a microphone device, characterized in that: A microphone device according to any one of claims 1 to 4, comprising: The processor is configured to collect a noise signal within a preset range of the microphone device via the reference microphone assembly; collect the noise signal within the microphone device and a target sound signal outside the microphone device via the sound pickup microphone assembly to obtain a mixed sound signal composed of the noise signal and the target sound signal; and perform noise reduction processing on the mixed sound signal based on the noise signal to obtain a noise-reduced sound signal.

8. An electronic device, characterized in that: include: A processor, a memory electrically connected to the processor; the memory stores a computer program, and the processor is used to call and execute the computer program from the memory to implement the steps of the noise reduction method of the microphone device according to claim 5 or 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the noise reduction method for the microphone device according to claim 5 or 6 are implemented.

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