Pickups and pickup methods

Abstract

The present invention discloses a sound pickup comprising at least two diaphragms and a sound pickup processing module. The at least two diaphragms each pick up sound waves of different target frequency bands and are connected to the sound pickup processing module. By selecting different diaphragms to specifically pick up sound waves of different frequency bands, the present invention enables each diaphragm to utilize its characteristics that are most suitable for picking up the frequency band. This solves the problem of existing sound pickups being either too sensitive and unsuitable for high-noise environments, or too lightweight, having low sensitivity, and poor high and low frequency response. This also achieves the technical effect of improving sound fidelity and preventing interference.

Description

Technical Field

[0001] The present invention relates to the field of audio signal reception and processing, and in particular to a pickup and a sound pickup method. Background Art

[0002] A pickup, also known as a monitoring head, is a device used to collect ambient sound from a live event and transmit it to backend equipment. It consists of a microphone and an audio amplifier circuit. Pickups are generally categorized as either digital or analog. A digital pickup is a sound sensor that converts analog audio signals into digital signals through a digital signal processing system and performs the corresponding digital signal processing. Analog pickups simply amplify the sound captured by the microphone using conventional analog circuits. Pickups come in either three-wire or four-wire configurations. Three-wire pickups typically have red representing the positive power supply, white representing the positive audio supply, and black representing the negative signal and power supply terminals (common ground). Four-wire pickups typically have red representing the positive power supply terminal, white representing the positive audio supply terminal, and separate negative audio and power supply terminals. Pickup products are generally divided into active and passive types, and are categorized by performance into acoustic guitar and monitoring pickups.

[0003] Currently, the existing pickups on the market are either too sensitive and not suitable for high-noise environments, or are not light enough, have low sensitivity, and have poor high and low frequency response. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the present invention discloses a microphone and a sound pickup method to solve the technical problems that the existing microphones are either too sensitive and not suitable for high-noise environments, or not light enough, have low sensitivity, and have poor high and low frequency response performance.

[0005] To achieve the above objectives, according to an embodiment of the present invention, the present invention provides a pickup, comprising: at least two diaphragms and a sound pickup processing module; wherein the at least two diaphragms respectively pick up sound waves with different target frequency bands and are connected to the sound pickup processing module.

[0006] Optionally, the sound pickup processing module includes: at least two filter circuits; wherein the filter circuits are respectively connected to the at least two diaphragms, and are used to convert and filter the sound waves in the target frequency band to obtain target electrical signals.

[0007] Optionally, in the pickup, centers of the at least two diaphragms are located on the same axis.

[0008] Optionally, the diaphragm includes: a high-frequency diaphragm and a low-frequency diaphragm; the high-frequency diaphragm is used to pick up sound waves in a first target frequency band; the low-frequency diaphragm is used to pick up sound waves in a second target frequency band; wherein the highest frequency of the sound waves in the first target frequency band is greater than the highest frequency of the sound waves in the second target frequency band.

[0009] Optionally, the sound pickup processing module includes: a high-frequency filtering circuit and a low-frequency filtering circuit connected in parallel, and a mixing module respectively connected to the high-frequency filtering circuit and the low-frequency filtering circuit; wherein the high-frequency filtering circuit converts the sound waves of the first target frequency band and performs high-frequency filtering to obtain a first target signal; the low-frequency filtering circuit converts the sound waves of the second target frequency band and performs low-frequency filtering to obtain a second target signal; the mixing module summarizes the first target signal and the second target signal to obtain a target output signal.

[0010] Optionally: the lowest frequency of the sound wave in the first target frequency band is less than the highest frequency of the sound wave in the second target frequency band; the lowest frequency of the sound wave in the first target frequency band to the highest frequency of the sound wave in the second target frequency band is an overlapping frequency band; the overlapping frequency band is respectively passed through a high-frequency filtering circuit and a low-frequency filtering circuit to obtain a first overlapping frequency band signal and a second overlapping frequency band signal; the mixing module summarizes the first target signal and the second target signal based on the comparison of the first overlapping frequency band signal and the second overlapping frequency band signal to obtain a target output signal.

[0011] Optionally, the high-frequency filter circuit includes a high-frequency sound-to-electricity conversion module and a high-pass filter module connected in sequence to the high-frequency diaphragm; the low-frequency filter circuit includes a low-frequency sound-to-electricity conversion module and a low-pass filter connected in sequence to the low-frequency diaphragm.

[0012] Optionally, the high-pass filter module includes a filter capacitor, one end of the high-pass filter capacitor is connected to the high-frequency sound-to-electricity conversion module, and the other end is connected to the mixing module;

[0013] The low-pass filter module includes a filter resistor and a low-pass filter capacitor. The first end of the filter resistor is connected to the low-frequency sound-to-electricity conversion module, the second end of the filter resistor is respectively connected to the first end of the low-pass filter capacitor and the mixing module, and the first end of the low-pass filter capacitor is grounded.

[0014] Optionally, the low-frequency filter circuit includes: a low-frequency sound-to-electricity conversion module, a first capacitor, a third capacitor, a fifth capacitor, a first resistor, a third resistor, and a fifth resistor;

[0015] The first end of the low-frequency sound-to-electricity conversion module is respectively connected to the first end of the first resistor, the first end of the first capacitor, and the first end of the third capacitor and is grounded. The second end of the low-frequency sound-to-electricity conversion module is respectively connected to the second end of the first resistor, the second end of the first capacitor, and the first end of the third resistor; the second end of the third resistor is respectively connected to the second end of the third capacitor and the first end of the fifth capacitor, and the second end of the fifth capacitor is connected to the first end of the fifth resistor;

[0016] The high-frequency filter circuit includes: a high-frequency sound-to-electricity conversion module, a second capacitor, a fourth capacitor, a seventh capacitor, a second resistor, a fourth resistor, a sixth resistor, and a seventh resistor;

[0017] The first end of the high-frequency sound-to-electricity conversion module is grounded, and the second end of the high-frequency sound-to-electricity conversion module is respectively connected to the first end of the sixth resistor, the first end of the second capacitor, and the first end of the second resistor; the second end of the sixth resistor is respectively connected to the first end of the seventh capacitor and the first end of the seventh resistor; the second end of the seventh capacitor is grounded; the second end of the seventh resistor is connected to an external power supply; the second end of the second capacitor is respectively connected to the second end of the second resistor and the first end of the fourth capacitor; the second end of the fourth capacitor is connected to the first end of the fourth resistor;

[0018] The frequency mixing module includes: a sixth capacitor;

[0019] The second end of the fifth resistor is connected to the second end of the fourth resistor and the first end of the sixth capacitor respectively; the second end of the sixth capacitor is connected to the external output.

[0020] To achieve the above object, according to an embodiment of the present invention, the present invention further provides a sound pickup method, comprising the following steps:

[0021] Pick up at least two different target frequency band sound waves simultaneously;

[0022] Converting and filtering the sound waves of at least two target frequency bands respectively to obtain at least two corresponding target signals;

[0023] The at least two target signals are mixed to obtain a target output signal.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] By selecting different diaphragms to specifically pick up sound waves in different frequency bands, different diaphragms can play their most suitable characteristics for picking up frequency bands, so that the sound can achieve better fidelity and avoid interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a specific embodiment of a pickup of the present invention;

[0027] Figure 2 is a circuit diagram of a specific embodiment of a pickup of the present invention;

[0028] Figure 3 It is a flow chart of a specific implementation of a sound pickup method of the present invention. DETAILED DESCRIPTION

[0029] The terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that such terms are interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. The division of units or modules presented herein is merely a logical division; alternative divisions may be employed in actual implementation. Furthermore, modules or submodules described as separate components may or may not be physically separate, may or may not be physical modules, or may be distributed across multiple circuit modules, with some or all of these modules being selected to achieve the objectives of the embodiments of the present invention as needed. It should be understood that when a component / module is referred to as being "connected" or "coupled" to another component / module, it may be directly connected or directly coupled to the other component / module, or the component / module may also exist. Conversely, when a component / module is referred to as being "directly connected" or "directly coupled" to another component / module, there are no intervening components / modules.

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be understood as limiting the present invention.

[0031] like Figures 1-3 As shown, to achieve the above-mentioned purpose, according to an embodiment of the present invention, the present invention provides a pickup, comprising: at least two diaphragms and a sound pickup processing module; wherein, the at least two diaphragms respectively pick up sound waves with different target frequency bands and are connected to the sound pickup processing module.

[0032] In this example, the pickup works as follows:

[0033] Different diaphragms interact with sound and acoustic waves, partially converting the acoustic waves into physical vibrations, which are then converted into electrical signals in the form of kinetic energy. Diaphragms with different characteristics, such as those based on the material's properties, can be used to pick up sounds in different frequency bands. These frequency bands can be continuous or discontinuous and distributed in a certain pattern, thereby leveraging the advantages of diaphragms with different characteristics. Existing methods can be used, as can other conversion methods conceivable by those skilled in the art, and all should be within the scope of protection.

[0034] For example, a dynamic pickup method can be used, where one side of the diaphragm receives sound pressure, while the other side is connected to a coil or similar device. Typically, the coil is wrapped around a magnet. When the front of the diaphragm receives sound pressure, the diaphragm's vibration pushes the coil to move, inducing electrification with the magnet. As the sound pressure increases, the degree of electrification changes, thus achieving sound-to-electricity conversion. Subsequent circuits can then amplify, filter, and perform other processing on the current generated by the induced electrification.

[0035] Another example is a capacitive pickup method, which requires an additional power source to operate. The telecoil consists of a thicker rear coil and a thinner front coil, with a slight gap between them. The front coil is made up of a diaphragm, a thin film that is sensitive to vibrations and coated with a metal layer. When the metal diaphragm receives vibrations from sound pressure, the distance between the front and rear coils changes, creating a potential difference in the energized circuit. This induced current is then amplified and filtered by circuitry to produce a sufficient signal.

[0036] Capacitive pickups require an additional power supply, while dynamic pickups rely solely on electromagnetic induction between the vibrating diaphragm and the coil. This requires a high level of sound pressure to convert the diaphragm, making it more difficult to adjust the current to sensitive sound pressure changes. Consequently, subtle sounds are difficult to capture and their sensitivity is lower than that of capacitive pickups. This makes dynamic pickups suitable for applications where capturing less detail is crucial. Capacitive pickup diaphragms, on the other hand, are thinner and more fragile than dynamic pickups, resulting in a lower maximum sound pressure tolerance. Conversely, capacitive pickup diaphragms offer higher sensitivity and frequency response than dynamic pickups, and a variety of signal amplification circuits are available. For example, the use of vacuum tubes can result in a warmer sound.

[0037] Therefore, the above two methods and other pickup methods and different characteristics of the diaphragm can be utilized. The inventor thought of utilizing the advantages of different diaphragms respectively and designing different diaphragms to pick up sound waves in different frequency bands. After mixing processing, the fidelity of the original sound can be achieved and the interference can be eliminated.

[0038] Optionally, the sound pickup processing module includes: at least two filter circuits; wherein the filter circuits are respectively connected to the at least two layers of diaphragms, and are used to convert and filter the sound waves in the target frequency band to obtain target electrical signals.

[0039] In this example, in order to further process the sound waves picked up in different frequency bands, different conversion circuits and filtering circuits can be used to perform specific processing based on the characteristics of different sound wave frequency bands, which can better remove noise.

[0040] Optionally, in the pickup, centers of the at least two diaphragms are located on the same axis.

[0041] In this example, to ensure that the sound source, loudness, and propagation direction of the two diaphragms are nearly identical, the centers of the two diaphragms are aligned. This allows for better fidelity to the original sound during mixing. The same axis refers to a line perpendicular to the surfaces of the two diaphragms, passing through their centers.

[0042] Optionally, the diaphragm includes: a high-frequency diaphragm and a low-frequency diaphragm; the high-frequency diaphragm is used to pick up sound waves in a first target frequency band; the low-frequency diaphragm is used to pick up sound waves in a second target frequency band; wherein the highest frequency of the sound waves in the first target frequency band is greater than the highest frequency of the sound waves in the second target frequency band.

[0043] In this example, the high-frequency diaphragm is used to pick up higher frequency bands, while the low-frequency diaphragm is used to pick up lower frequency bands. Of course, those skilled in the art will readily appreciate that an intermediate-frequency diaphragm can also be provided to pick up intermediate-frequency sound waves, and so on. The type and number of diaphragms can be set as needed based on the sound wave frequency bands. Alternatively, the high-frequency diaphragm is used to receive high-frequency and ultra-high-frequency sound wave bands, while the low-frequency diaphragm is used to receive intermediate-frequency and low-frequency sound wave bands.

[0044] Optionally, the sound pickup processing module includes: a high-frequency filtering circuit and a low-frequency filtering circuit connected in parallel, and a mixing module respectively connected to the high-frequency filtering circuit and the low-frequency filtering circuit; wherein the high-frequency filtering circuit converts the sound waves of the first target frequency band and performs high-frequency filtering to obtain a first target signal; the low-frequency filtering circuit converts the sound waves of the second target frequency band and performs low-frequency filtering to obtain a second target signal; the mixing module summarizes the first target signal and the second target signal to obtain a target output signal.

[0045] In this example, the mixing module can perform some processing on the first target signal and the second target signal, such as further filtering, amplification, etc., and then summarize them. Figure 2 As mentioned above, after passing through the sixth capacitor, different audio frequencies are mixed by selecting different resistance values ​​of R4 and R5. Of course, if you want to change the effect of the original sound, you can also make different processing for different audio frequencies, such as brightening the highs and softening the lows, etc., to achieve the effect of changing or optimizing the original sound quality.

[0046] Optionally: the lowest frequency of the sound wave in the first target frequency band is less than the highest frequency of the sound wave in the second target frequency band; the lowest frequency of the sound wave in the first target frequency band to the highest frequency of the sound wave in the second target frequency band is an overlapping frequency band; the overlapping frequency band is respectively passed through a high-frequency filtering circuit and a low-frequency filtering circuit to obtain a first overlapping frequency band signal and a second overlapping frequency band signal; the mixing module summarizes the first target signal and the second target signal based on the comparison of the first overlapping frequency band signal and the second overlapping frequency band signal to obtain a target output signal.

[0047] In this example, because the high and low audio frequencies are converted into high and low frequency alternating currents and then processed by different filter circuits, they may also undergo asynchronous amplification. To ensure higher fidelity in the final mixing, the differences between the overlapping segments after passing through different filter circuits can be compared, and the first target signal and the second target signal can be adaptively adjusted using a chip or replaceable functional module. This can achieve fidelity or more accurately optimize the original sound texture under different characteristics.

[0048] Optionally, the high-frequency filter circuit includes a high-frequency sound-to-electricity conversion module and a high-pass filter module connected in sequence to the high-frequency diaphragm; the low-frequency filter circuit includes a low-frequency sound-to-electricity conversion module and a low-pass filter connected in sequence to the low-frequency diaphragm.

[0049] Optionally, the high-pass filter module includes a filter capacitor, one end of the high-pass filter capacitor is connected to the high-frequency sound-to-electricity conversion module, and the other end is connected to the mixing module;

[0050] The low-pass filter module includes a filter resistor and a low-pass filter capacitor. The first end of the filter resistor is connected to the low-frequency sound-to-electricity conversion module, the second end of the filter resistor is respectively connected to the first end of the low-pass filter capacitor and the mixing module, and the first end of the low-pass filter capacitor is grounded.

[0051] In this example, the most basic form of the first-order high-frequency and low-frequency capacitor filter can be used. The high-frequency filter capacitor is equivalent to a short circuit, thereby conducting the high frequency, while not conducting the low frequency. The high-frequency filter circuit is connected in series; and the low-frequency filter circuit is grounded, and the high-frequency signal to be filtered is transmitted to the ground, thereby achieving the effect of filtering high and low frequencies separately.

[0052] Optionally, the low-frequency filter circuit includes: a low-frequency sound-to-electricity conversion module, a first capacitor C1, a third capacitor C3, a fifth capacitor C5, a first resistor R1, a third resistor R3 and a fifth resistor R5;

[0053] The first end of the low-frequency sound-to-electricity conversion module is respectively connected to the first end of the first resistor R1, the first end of the first capacitor C1, and the first end of the third capacitor C3, and is grounded. The second end of the low-frequency sound-to-electricity conversion module is respectively connected to the second end of the first resistor R1, the second end of the first capacitor C1, and the first end of the third resistor R3; the second end of the third resistor R3 is respectively connected to the second end of the third capacitor C3 and the first end of the fifth capacitor C5. The second end of the fifth capacitor C5 is connected to the first end of the fifth resistor R5.

[0054] The high-frequency filter circuit includes: a high-frequency sound-to-electricity conversion module, a second capacitor C2, a fourth capacitor C4, a seventh capacitor C7, a second resistor R2, a fourth resistor R4, a sixth resistor R6 and a seventh resistor R7;

[0055] The first end of the high-frequency sound-to-electricity conversion module is grounded, and the second end of the high-frequency sound-to-electricity conversion module is respectively connected to the first end of the sixth resistor R6, the first end of the second capacitor C2, and the first end of the second resistor R2; the second end of the sixth resistor R6 is respectively connected to the first end of the seventh capacitor C7 and the first end of the seventh resistor R7; the second end of the seventh capacitor C7 is grounded; the second end of the seventh resistor R7 is connected to the external power supply; the second end of the second capacitor C2 is respectively connected to the second end of the second resistor R2 and the first end of the fourth capacitor C4; the second end of the fourth capacitor C4 is connected to the first end of the fourth resistor;

[0056] The frequency mixing module includes: a sixth capacitor C6;

[0057] The second end of the fifth resistor R5 is connected to the second end of the fourth resistor R4 and the first end of the sixth capacitor C6 respectively; the second end of the sixth capacitor C6 is connected to the external output.

[0058] In this example, if Figure 2 As shown, a high-frequency filtering circuit, a low-frequency filtering circuit and a specific implementation structure of the mixing module are given in detail. This example utilizes the grounding structure of capacitors and resistors to effectively filter out the corresponding high-frequency and low-frequency noises respectively.

[0059] The second capacitor C2 and the second resistor R2, connected in parallel, act as high-frequency filters. Adjusting the values ​​of the fourth capacitor C4 in series with these three components can change the amount and proportion of super-high and treble tones entering the back-end circuit. The first resistor R1, the third resistor R3, the first capacitor C1, and the third capacitor C3 form a loop connected through the first end of the first capacitor C1 and the first end of the third capacitor C3, which are then connected to ground, acting as a low-frequency filter. Adjusting the values ​​of the relevant components can change the amount and proportion of mid-range and bass tones passing through. The high-pass and low-pass filter circuits in this example are just one type of circuit implementation. This functional implementation includes but is not limited to the above-mentioned circuit form. Those skilled in the art can create many circuits with similar functions.

[0060] The sixth resistor, the seventh resistor and the seventh capacitor form a decoupling loop, which is grounded via the second end of the seventh capacitor, thereby effectively eliminating the coupling effect on the power supply VCC.

[0061] The fourth resistor R4, the fifth resistor R5 and the sixth capacitor C6 form a mixing module, which mixes the super high frequency, treble, mid-range and bass signals and enters the subsequent circuit.

[0062] Among them, the fourth capacitor C4, the fifth capacitor C5, the fourth resistor R4, and the fifth resistor R5 can be used as part of the high and low frequency filter circuits for adjustment, or as part of the mixing module for adjustment. This module division is not an absolute division.

[0063] To achieve the above object, according to an embodiment of the present invention, the present invention further provides a sound pickup method, comprising the following steps:

[0064] S101 simultaneously picks up at least two sound waves of different target frequency bands;

[0065] S102 converts and filters the sound waves of at least two target frequency bands respectively to obtain at least two corresponding target signals;

[0066] S103 performs mixing processing on the at least two target signals to obtain a target output signal.

[0067] This example Figure 3 As shown, at least two sound waves of different target frequency bands are picked up simultaneously, and according to the characteristics of the sound waves of at least two target frequency bands, the sound-to-electricity conversion structure (such as dynamic type or capacitive type) and the filtering circuit (such as high-frequency filtering circuit and low-frequency filtering circuit) as described in the above example are designed respectively, and the sound waves are converted and filtered respectively, and then mixed by the above-mentioned method to obtain the output target output signal.

[0068] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort, such as various combinations of circuit units that do not affect the underlying invention. Therefore, any technical solution that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the prior art should be within the scope of protection defined by the claims.

Claims

1. A pickup, characterized in that: include: At least two diaphragms and a sound pickup processing module; wherein the at least two diaphragms respectively pick up sound waves of different target frequency bands and are connected to the sound pickup processing module; the diaphragms include: a high-frequency diaphragm and a low-frequency diaphragm; The high-frequency diaphragm is used to pick up sound waves in the first target frequency band; The low-frequency diaphragm is used to pick up sound waves in the second target frequency band; The highest frequency of the sound waves in the first target frequency band is greater than the highest frequency of the sound waves in the second target frequency band; The sound pickup processing module includes: a high-frequency filter circuit and a low-frequency filter circuit connected in parallel, and a mixing module connected to the high-frequency filter circuit and the low-frequency filter circuit respectively. The high-frequency filter circuit converts the sound wave of the first target frequency band and performs high-frequency filtering to obtain a first target signal; The low-frequency filtering circuit converts the sound wave of the second target frequency band and performs low-frequency filtering to obtain a second target signal; The lowest frequency of the sound wave in the first target frequency band is lower than the highest frequency of the sound wave in the second target frequency band; The lowest frequency of the sound wave in the first target frequency band to the highest frequency of the sound wave in the second target frequency band is an overlapping frequency band; The overlapping frequency bands are respectively passed through a high-frequency filtering circuit and a low-frequency filtering circuit to obtain a first overlapping frequency band signal and a second overlapping frequency band signal; The mixing module adaptively adjusts the first target signal and the second target signal based on the difference between the first overlapping frequency band signal and the second overlapping frequency band signal, and combines the adjusted first target signal and the adjusted second target signal to obtain a target output signal.

2. The pickup according to claim 1, wherein The sound pickup processing module includes: at least two filter circuits; wherein, the filter circuits are respectively connected to the at least two diaphragms, and are used to convert and filter the sound waves in the target frequency band to obtain target electrical signals.

3. The pickup according to claim 1, wherein The centers of the at least two diaphragms are located on the same axis.

4. The pickup according to any one of claims 1 to 3, characterized in that: The high-frequency filter circuit includes a high-frequency sound-to-electricity conversion module and a high-pass filter module connected in sequence to the high-frequency diaphragm; the low-frequency filter circuit includes a low-frequency sound-to-electricity conversion module and a low-pass filter module connected in sequence to the low-frequency diaphragm.

5. The pickup according to claim 4, wherein The high-pass filter module includes a high-pass filter capacitor, one end of which is connected to the high-frequency sound-to-electricity conversion module, and the other end is connected to the mixing module; The low-pass filter module includes a filter resistor and a low-pass filter capacitor. The first end of the filter resistor is connected to the low-frequency sound-to-electricity conversion module, the second end of the filter resistor is respectively connected to the first end of the low-pass filter capacitor and the mixing module, and the first end of the low-pass filter capacitor is grounded.

6. The pickup according to any one of claims 1 to 3, characterized in that: The low-frequency filter circuit includes: a low-frequency sound-to-electricity conversion module, a first capacitor, a third capacitor, a fifth capacitor, a first resistor, a third resistor, and a fifth resistor; The first end of the low-frequency sound-to-electricity conversion module is respectively connected to the first end of the first resistor, the first end of the first capacitor, and the first end of the third capacitor and is grounded. The second end of the low-frequency sound-to-electricity conversion module is respectively connected to the second end of the first resistor, the second end of the first capacitor, and the first end of the third resistor; the second end of the third resistor is respectively connected to the second end of the third capacitor and the first end of the fifth capacitor, and the second end of the fifth capacitor is connected to the first end of the fifth resistor; The high-frequency filter circuit includes: a high-frequency sound-to-electricity conversion module, a second capacitor, a fourth capacitor, a seventh capacitor, a second resistor, a fourth resistor, a sixth resistor, and a seventh resistor; The first end of the high-frequency sound-to-electricity conversion module is grounded, and the second end of the high-frequency sound-to-electricity conversion module is respectively connected to the first end of the sixth resistor, the first end of the second capacitor, and the first end of the second resistor; the second end of the sixth resistor is respectively connected to the first end of the seventh capacitor and the first end of the seventh resistor; the second end of the seventh capacitor is grounded; the second end of the seventh resistor is connected to an external power supply; the second end of the second capacitor is respectively connected to the second end of the second resistor and the first end of the fourth capacitor; the second end of the fourth capacitor is connected to the first end of the fourth resistor; The frequency mixing module includes: a sixth capacitor; The second end of the fifth resistor is connected to the second end of the fourth resistor and the first end of the sixth capacitor respectively; the second end of the sixth capacitor is connected to the external output.

7. A sound pickup method, characterized in that: The steps include: Pick up at least two different target frequency band sound waves simultaneously; Converting and filtering the sound waves of at least two target frequency bands respectively to obtain at least two corresponding target signals; The at least two target signals are mixed to obtain a target output signal.

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