A resonator

Abstract

Embodiments of the present application provide a resonator and an electronic device, the resonator comprising: at least one air cavity and a plurality of air channels in communication with the air cavity, by tuning the air cavity and the air channels in communication with the air cavity, the desired acoustic quality and low acoustic damping can be reasonably maintained, and at the same time, higher modes are distributed in a wider frequency range, and the resonance peaks caused by the higher modes in the frequency response of the resonator can be attenuated to avoid interfering with the desired performance of the resonator.

Description

Technical Field

[0001] This invention relates to the field of resonator technology, and more particularly to a resonator. Background Technology

[0002] A resonator is an electronic component that generates a resonant frequency, including electronic resonators. In acoustics, a resonator is a structure that generates an acoustic resonant frequency, typically a Helmholtz resonator. Resonators generate frequencies, are stable, and have good anti-interference performance, making them widely used in various electronic devices.

[0003] In one related technique, appropriate attenuation is required for any resonance with a frequency higher than the resonator's primary (lowest) resonant frequency. In this case, sound-attenuating materials are typically applied in the resonator's air passage or air volume, and the required low acoustic damping at the resonator's primary resonant frequency cannot be guaranteed.

[0004] In another related technique, the resonator has a shorter air channel length to avoid higher modes appearing in the air channel; therefore, the air channel also needs a smaller cross-sectional area. This increases the airflow in the resonator's air channel, making it difficult to maintain the resonator's low acoustic damping and thus failing to guarantee the resonator's desired performance. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a resonator designed to ensure the desired performance of the resonator.

[0006] On one hand, embodiments of the present invention provide a resonator, including: at least one air cavity and a plurality of air channels communicating with the air cavity; The air cavity is tuned to the air channel to produce one or more acoustic resonances.

[0007] Optionally, it also includes: an acoustic port disposed on at least one air cavity.

[0008] Optionally, the air passage includes a pipe.

[0009] Optionally, the cross-sectional shape of the tube may include a circle, a rectangle, or an irregular shape.

[0010] Optionally, the axes of the plurality of tubes are all bent to one side.

[0011] Optionally, the two ends of the tube may include rounded corner structures or flared structures.

[0012] Optionally, the air passage includes a partition inside a single tube; A partition wall is provided between adjacent partitions.

[0013] Optionally, the air passage includes a groove.

[0014] Optionally, the plurality of air channels are parallel to each other.

[0015] Optionally, the plurality of air channels are arranged along a first direction; Along the first direction, the effective length of the plurality of air channels gradually decreases.

[0016] Optionally, among the effective lengths of the plurality of air channels, the ratio of the largest effective length to the smallest effective length is less than 2.

[0017] Optionally, the effective length of the air channel is determined by the formula... The calculation shows that, The length of a single air channel is required to achieve the desired acoustic quality. for coefficient, Let n be the effective length of the air channel, and n be the label of the air channel along the first direction.

[0018] Optionally, the effective length of the air channel is determined by the formula... The calculation shows that, The length of a single air channel is required to achieve the desired acoustic quality. for The coefficient, where N is the total number of air channels. Let n be the effective length of the air channel, and n be the label of the air channel along the first direction.

[0019] Optionally, the effective cross-sectional area of ​​the air passage is determined by the formula... The calculation shows that, The cross-sectional area of ​​a single air channel is required to achieve the desired acoustic quality. for The coefficient, where N is the total number of air channels. Let n be the effective cross-sectional area of ​​the air passage, and n be the label of the air passage along the first direction.

[0020] Optionally, the coefficient Where N is the total number of air channels and r is a constant.

[0021] Optionally, the air cavity includes a first surface, a second surface, and a third surface, wherein the first surface and the second surface are adjacent to each other, the first surface and the third surface are adjacent to each other, the second surface and the third surface are opposite to each other, some of the multiple air channels are disposed on the first surface, some of the multiple air channels are disposed on the second surface, and some of the multiple air channels are disposed on the third surface.

[0022] Optionally, the air channel disposed on the second surface is bent in the extending direction of the air channel disposed on the first surface, and the air channel disposed on the third surface is bent in the extending direction of the air channel disposed on the first surface.

[0023] Optionally, the air passage extends partially into the air cavity, or the air passage extends entirely into the air cavity.

[0024] Optionally, one end of the air channel is connected to an air cavity, and the other end of the air channel is connected to an external air volume, which includes: the air channel, the air cavity, or an acoustic resonator.

[0025] In the technical solution provided by the embodiments of the present invention, the resonator includes: at least one air cavity and multiple air channels communicating with the air cavity. By tuning through the air cavity and the air channels communicating with the air cavity, the required acoustic quality and low acoustic damping can be reasonably maintained, while higher modes are allocated in a large frequency range. The resonance peak caused by the higher modes in the frequency response of the resonator can be attenuated so as not to interfere with the desired performance of the resonator. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of a resonator structure provided for related technologies; Figure 2 A schematic diagram of a resonator provided in an embodiment of the present invention; Figure 3 for Figure 2 A-A' sectional view of the air duct; Figure 4 A schematic diagram of another resonator provided in an embodiment of the present invention; Figure 5A schematic diagram of another resonator provided in an embodiment of the present invention; Figure 6 for Figure 4 or Figure 5 Sectional view of the air passage along line B-B'; Figure 7 A schematic diagram of another resonator provided in an embodiment of the present invention; Figure 8 A schematic diagram of another resonator provided in an embodiment of the present invention; Figure 9 A schematic diagram of another resonator provided in an embodiment of the present invention; Figure 10 A schematic diagram illustrating the application of a resonator for related technologies; Figure 11 A schematic diagram illustrating the application of another resonator for related technologies; Figure 12 This is a schematic diagram illustrating the application of a resonator provided in an embodiment of the present invention. Detailed Implementation

[0028] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0032] Many resonator configurations in related technologies aim to make the air channel behave acoustically well across the entire audio frequency range where the resonator is expected to operate. However, because the wavelength of sound decreases with frequency, at higher frequencies, this air channel no longer behaves purely acoustically well, where the wavelength no longer decreases compared to the axial length of the air channel (i.e., its length in the direction of sound propagation). Additional longitudinal acoustic resonances arise approximately at frequencies that coincide with the length of the air channel at certain fractional multiples of the wavelength (e.g., 1 / 2, 1, 3 / 2, ...). The exact frequencies of these higher longitudinal modes depend on the acoustic structure to which the air channel is connected. Above a given frequency, multiple longitudinal modes appear at regular or nearly regular intervals, and these higher modes often have a negative impact on the frequency response of the structure containing the resonator.

[0033] Figure 1 A schematic diagram of a resonator structure is provided for related technologies, such as Figure 1 As shown, the resonator includes an air cavity 1 and a tube 2 connected to the air cavity 1; the air cavity 1 and the tube 2 are tuned to produce acoustic resonance. Typically, a shorter tube 2 with a smaller cross-sectional area is used to connect to the air cavity 1, increasing the air velocity within the resonator. This increases the risk of certain artifacts, particularly increasing flow noise generated inside or outside the tube 2. This causes excessive changes in acoustic impedance with flow velocity, leading to nonlinear distortion, which attenuates the main resonance in the resonator and fails to guarantee low acoustic damping, thus compromising the resonator's desired performance.

[0034] To address the technical problems in related technologies, embodiments of the present invention provide a resonator. Figure 2 A schematic diagram of a resonator provided in an embodiment of the present invention is shown below. Figure 2 As shown, the resonator includes: at least one air cavity 1 and a plurality of air channels communicating with the air cavity 1; the air cavity 1 is tuned to the air channels to generate one or more acoustic resonances.

[0035] In embodiments of the present invention, such as Figure 2 As shown, the resonator includes an air cavity 1. The air cavity 1 has a hollow structure and may or may not be connected to the outside air. If the air cavity 1 is connected to the outside air, it simply acts as an air channel. The air cavity 1 may include multiple sidewalls 11. As an alternative, the air cavity 1 may have a cubic structure, in which case the number of sidewalls 11 may be six, or the number of sidewalls 11 may be less than six, for example, five. Air channels are provided on one or more sidewalls 11.

[0036] In this embodiment of the invention, the air channel may include a tube 2. Therefore, the resonator may include multiple tubes 2, all of which are connected to the air cavity 1. Figure 2 As shown in the example, multiple tubes 2 are all disposed on a side wall 11.

[0037] In this embodiment of the invention, the multiple air channels are parallel to each other. For example... Figure 2 As shown, when the air passage includes pipe 2, multiple pipes 2 are arranged in parallel. The multiple pipes 2 can be arranged in one row and multiple columns or multiple rows and multiple columns, such as... Figure 2 As shown, multiple tubes 2 are arranged in a row and multiple columns. The multiple tubes 2 are spaced apart, and the spacing between adjacent tubes 2 can be the same or different, such as... Figure 2 As shown in the example, the spacing between two adjacent pipes 2 is the same; in other words, multiple pipes 2 are set at equal intervals.

[0038] As an alternative, the multiple tubes 2 can also be non-parallel, for example, the multiple tubes 2 can be arranged in a divergent manner, but this case is not specifically drawn.

[0039] The number of tubes 2 can be multiple. In this embodiment of the invention, the number of tubes 2 can be set according to actual conditions, wherein the number of tubes 2 can be set depending on the available space, available size, and performance requirements of the resonator. For example... Figure 2 As shown, the description is based on four tubes 2. The four tubes 2 are parallel to each other and are set at equal intervals.

[0040] In this embodiment of the invention, the cross-sectional shapes of the multiple tubes 2 may be the same or different. For example, the cross-sectional shapes of all tubes 2 may be the same, or the cross-sectional shapes of some tubes 2 may be the same, or the cross-sectional shapes of each tube 2 may be different.

[0041] The shape of the cross-section of tube 2 can be set according to actual needs. Figure 3 for Figure 2 A-A' sectional view of the air passage, as shown Figure 3 As shown, the cross-sectional shape of tube 2 is circular. As an alternative, the cross-sectional shape of tube 2 can also include other shapes, such as rectangles, hexagons, ellipses, or irregular shapes.

[0042] In this embodiment of the invention, one end 23 of the air channel is connected to the air cavity 1, and the other end 24 of the air channel is either closed or open. Figure 2 As shown, when the air channel includes pipe 2, one end 23 of pipe 2 is connected to air cavity 1, and the other end 24 of pipe 2 is either closed or open. Specifically, one end 23 of pipe 2 is the end connected to air cavity 1, and the other end 24 of pipe 2 is the end away from air cavity 1.

[0043] As an alternative, one end of the air channel is connected to an air cavity, and the other end is connected to another external air volume. The external air volume includes: an air channel, an air cavity, or an acoustic resonator. When the external air volume includes an air channel, and the air channel includes a tube, one end of the tube is connected to an air cavity, and the other end is connected to another air cavity; that is, each end of the tube is connected to an air cavity, and the tube is connected to two air cavities. This case is not specifically illustrated.

[0044] In this embodiment of the invention, multiple air channels are arranged along a first direction; along the first direction, the effective length of the multiple air channels gradually decreases. For example... Figure 2 As shown, when the air channel includes pipe 2, multiple pipes 2 are arranged along a first direction; along the first direction, the effective length of the multiple pipes 2 gradually decreases.

[0045] In this embodiment of the invention, along the first direction, the ratio of the effective length of any air channel to the effective length of the next air channel is greater than 1 and less than or equal to 2. For example... Figure 2 As shown, when the air passage includes pipe 2, the ratio of the effective length of any pipe 2 to the effective length of the next pipe 2 along the first direction is 2. Alternatively, the ratio of the effective length of any pipe 2 to the effective length of the next pipe 2 may be greater than 1 and less than 2.

[0046] In this embodiment of the invention, the ratio of the effective length of multiple air channels to the effective length of the next air channel is all the same, partially the same, or all different. When the air channel includes a pipe, the ratio of the effective length of multiple pipes to the effective length of the next pipe is all the same, partially the same, or all different. Figure 2 As shown, the ratio of the effective length of multiple tubes 2 to the effective length of the next tube 2 is the same.

[0047] In this embodiment of the invention, among the effective lengths of multiple air channels, the ratio of the largest effective length to the smallest effective length is less than 2. For example... Figure 2 As shown, when the air channel includes pipe 2, the ratio of the largest effective length to the smallest effective length among the multiple effective lengths of pipe 2 is less than 2.

[0048] In this embodiment of the invention, the effective length of the air channel is determined by formula (1): Calculations show that, for example Figure 2 As shown, when the air passage includes pipe 2, To achieve the required acoustic quality, the corresponding length of a single tube 2, for coefficient, Let n be the effective length of pipe 2, and n be the label of pipe 2 along the first direction.

[0049] In this embodiment of the invention, the effective cross-sectional area of ​​the air channel is determined by formula (2): Calculations show that, for example Figure 2 As shown, when the air passage includes pipe 2, To achieve the required acoustic quality, the corresponding cross-sectional area of ​​a single tube 2, for The coefficient, where N is the total number of tubes 2, Let n be the effective cross-sectional area of ​​pipe 2, and n be the label of pipe 2 along the first direction.

[0050] In this embodiment of the invention, the coefficient By formula (3): Calculations show that, for example Figure 2 As shown, when the air passage includes pipe 2, N is the total number of pipes 2, and r is a constant.

[0051] In this embodiment of the invention, the value range of the label n of the air channel along the first direction includes greater than or equal to 1 and less than or equal to N. For example... Figure 2 As shown, when the air channel includes pipe 2, the total number of pipe 2 is 4. The pipes 2 along the first direction are numbered sequentially, and the numbers of the pipes 2 along the first direction are 1, 2, 3, 4, that is, n is 1, 2, 3 or 4.

[0052] In this embodiment of the invention, the constant r takes values ​​greater than 1 and less than or equal to 2. This can help reduce the height of resonance peaks caused by some of the highest modes, but at the cost of less reduction in lower modes.

[0053] The effective length and effective cross-sectional area of ​​the air passage can be determined by formulas (1) to (3). As an alternative, such as... Figure 2 As shown, when the air channel includes tube 2, the calculated effective length and effective cross-sectional area of ​​tube 2 can be slightly increased to compensate for the slight increase in acoustic impedance caused by using multiple tubes 2.

[0054] To ensure simpler mechanical implementation, all air passages have the same cross-section, instead of being scaled proportionally as in formula (2). Alternatively, the effective length of the air passage is determined by formula (4): Calculations show that, for example Figure 2 As shown, when the air passage includes pipe 2, To achieve the required acoustic quality, the corresponding length of a single tube 2, for The coefficient, where N is the total number of tubes 2, Let n be the effective length of tube 2, and n be the label of the air passage along the first direction. Figure 2 The total number of tubes 2 is 4, that is, N is 4.

[0055] In embodiments of the present invention, such as Figure 2 As shown, when the air passage includes pipe 2, the effective length and effective cross-sectional area of ​​pipe 2 can be approximately determined by formulas (1) to (4), and the effective length and effective cross-sectional area of ​​pipe 2 can be finely adjusted according to the shape of the cross-section of pipe 2 and other constraints.

[0056] In embodiments of the present invention, such as Figure 2 As shown, when the air channel includes tube 2, the total number N of tube 2 can be freely chosen. When N is a smaller number, it will not redistribute and attenuate higher modes as effectively as when N is a larger number. However, a larger number will make the individual area of ​​each tube 2 smaller, resulting in gradually higher acoustic damping, which in turn will attenuate the main resonance of the required acoustic resonator.

[0057] In the technical solution provided by the embodiments of the present invention, the resonator includes at least one air cavity and multiple air channels communicating with the air cavity. By tuning the air cavity and the air channels communicating with the air cavity, the required acoustic quality and low acoustic damping can be reasonably maintained, while higher modes are allocated in a large frequency range. The resonance peak caused by the higher modes in the frequency response of the resonator can be attenuated so as not to interfere with the desired performance of the resonator.

[0058] In the technical solution provided by this invention, the resonator construction ensures an ideal main resonant frequency and a reduction effect in higher modes, and solves the nonlinear distortion problem caused by shorter and narrower air channels in related technologies.

[0059] In the technical solution provided by the embodiments of the present invention, the airflow at one or both ends of the separated air channels will naturally be distributed over a greater distance, rather than being entirely distributed at a single end. This can be advantageous when the air channels are connected to narrow or geometrically complex air spaces, which would otherwise be difficult to accommodate large flow rates from a single air channel without causing flow noise or other artifacts.

[0060] In the technical solution provided by the embodiments of the present invention, there is no interruption along any given length of air channel. This avoids the problem of flow noise that may occur if a single air channel is equipped with parallel resonators that exhibit edge-like defects.

[0061] This invention provides another resonator. Figure 4 A schematic diagram of another resonator provided in an embodiment of the present invention is shown below. Figure 4 As shown, the resonator includes: at least one air cavity 1 and a plurality of air channels communicating with the air cavity 1; the air cavity 1 is tuned to the air channels to generate one or more acoustic resonances.

[0062] In embodiments of the present invention, such as Figure 4 As shown, the resonator includes an air cavity 1. The air cavity 1 has a hollow structure and may or may not be connected to the outside air. If the air cavity 1 is connected to the outside air, it simply acts as an air channel. The air cavity 1 may include multiple sidewalls 11. As an alternative, the air cavity 1 may have a cubic structure, in which case the number of sidewalls 11 may be six, or the number of sidewalls 11 may be less than six, for example, five. Air channels are provided on one or more sidewalls 11.

[0063] In this embodiment of the invention, the air channel may include a tube 2. Therefore, the resonator may include multiple tubes 2, all of which are connected to the air cavity 1. Figure 4 As shown in the example, one pipe 2 is disposed on one side wall 11. As an alternative, multiple pipes 2 can also be disposed on different side walls 11, which will not be specifically drawn.

[0064] In embodiments of the present invention, such as Figure 4 As shown, the air passage includes a partition 21 inside a single tube 2, and a partition wall 22 is provided between adjacent partitions 21.

[0065] In embodiments of the present invention, such as Figure 4 As shown, the pipe 2 can be divided into multiple partitions 21 by partition walls 22, and the multiple partitions 21 can be arranged in one row and multiple columns or multiple rows and multiple columns. There are only thin partition walls 22 between adjacent partitions 21.

[0066] As an alternative, Figure 5 A schematic diagram of another resonator provided in an embodiment of the present invention is shown below. Figure 5 As shown, the partition wall 22 can be used to support the outer wall 25 of the tube 2. For example, the outer wall 25 of the tube 2 may include a plastic film or a plastic film-like material.

[0067] In this embodiment of the invention, multiple air channels are arranged in parallel. When the air channels include partitions 21, the multiple partitions 21 are arranged in parallel. Figure 4 As shown, when the air passage includes the partition 21 inside the pipe 2, the multiple partitions 21 are arranged in a row and multiple columns.

[0068] As an alternative, the multiple partitions may not be parallel; for example, the multiple partitions may be arranged in a divergent manner, but this case is not specifically drawn.

[0069] The number of partitions 21 can be multiple. For example... Figure 4 As shown, a tube 2 includes four partitions 21. The four partitions 21 are described as an example, and they are parallel to each other.

[0070] In this embodiment of the invention, as an optional solution, the cross-sectional shapes of the multiple partitions 21 may be the same.

[0071] In this embodiment of the invention, the shape of the cross-section of the partition 21 can be set as needed. Figure 6 for Figure 4 or Figure 5 A cross-sectional view of the air passage along the B-B' direction, as shown below. Figure 6 As shown, the cross-sectional shape of the partition 21 includes a rectangle. As an alternative, the cross-sectional shape of the partition 21 may also include other shapes, such as a circle, hexagon, or ellipse.

[0072] In this embodiment of the invention, one end 23 of the air channel is connected to the air cavity 1, and the other end 24 of the air channel is either closed or open. Figure 4 As shown, when the air channel includes a partition 21, one end 23 of the partition 21 is connected to the air cavity 1, and the other end 24 of the partition 21 is either closed or open. Specifically, one end 23 of the partition 21 is the end connected to the air cavity 1, and the other end 24 of the partition 21 is the end away from the air cavity 1.

[0073] As an alternative, one end of the air channel is connected to an air cavity, and the other end is connected to another external air volume. The external air volume includes: an air channel, an air cavity, or an acoustic resonator. When the external air volume includes an air channel, and the air channel includes a partition, one end of the partition is connected to an air cavity, and the other end is connected to another air cavity; that is, each end of the partition is connected to an air cavity, and the partition is connected to two air cavities. This case is not specifically depicted.

[0074] In this embodiment of the invention, multiple air channels are arranged along a first direction; along the first direction, the effective length of the multiple air channels gradually decreases. For example... Figure 4 As shown, when the air channel includes a partition 21, the multiple partitions 21 are arranged along a first direction, and the effective length of the multiple partitions 21 gradually decreases along the first direction.

[0075] In this embodiment of the invention, along the first direction, the ratio of the effective length of any air channel to the effective length of the next air channel is greater than 1 and less than or equal to 2. For example... Figure 4 As shown, when the air passage includes a partition 21, the ratio of the effective length of any partition 21 to the effective length of the next partition 21 along the first direction is 2. Alternatively, the ratio of the effective length of any partition 21 to the effective length of the next partition 21 may be greater than 1 and less than 2.

[0076] In this embodiment of the invention, the ratio of the effective length of multiple air channels to the effective length of the next air channel is all the same, partially the same, or all different. When the air channel includes a partition, the ratio of the effective length of multiple partitions to the effective length of the next partition is all the same, partially the same, or all different. Figure 4 As shown, the ratio of the effective length of each of the multiple partitions 21 to the effective length of the next partition 21 is the same.

[0077] In this embodiment of the invention, the effective length of the dividing portion 21 depends on the number of dividing portions 21, and the ratio of the effective length of the dividing portion 21 to the effective length of the next dividing portion 21 depends on the number of dividing portions 21.

[0078] In this embodiment of the invention, among the effective lengths of multiple air channels, the ratio of the largest effective length to the smallest effective length is less than 2. For example... Figure 4 As shown, when the air passage includes a partition 21, the ratio of the largest effective length to the smallest effective length among the multiple partitions 21 is less than 2.

[0079] In this embodiment of the invention, the effective length of the air channel is determined by formula (1): Calculations show that, for example Figure 4 As shown, when the air passage includes the partition 21, To achieve the required acoustic quality, the length of the corresponding individual partition 21, for coefficient, Let n be the effective length of the partition 21, and n be the label of the partition 21 along the first direction.

[0080] In this embodiment of the invention, the effective cross-sectional area of ​​the air channel is determined by formula (2): Calculations show that, for example Figure 4 As shown, when the air passage includes the partition 21, To achieve the required acoustic quality, the cross-sectional area of ​​the corresponding individual partition 21, for The coefficient, N, is the total number of partitions 21. Let n be the effective cross-sectional area of ​​the partition 21, and n be the label of the partition 21 along the first direction.

[0081] In this embodiment of the invention, the coefficient By formula (3): Calculations show that, for example Figure 4 As shown, when the air passage includes partitions 21, N is the total number of partitions 21, and r is a constant.

[0082] In this embodiment of the invention, the value range of the air channel number n along the first direction includes greater than or equal to 1 and less than or equal to N. For example... Figure 4 As shown, when the air passage includes a partition 21, the total number of partitions 21 is 4. The partitions 21 along the first direction are numbered sequentially, and the partitions along the first direction are numbered 1, 2, 3, 4, that is, n is 1, 2, 3 or 4.

[0083] In this embodiment of the invention, the value range of the constant r includes values ​​greater than 1 and less than or equal to 2, and the constant r is typically equal to 2. When r is greater than 1 and less than 2, it can help reduce the height of the resonance peaks caused by certain highest modes, at the cost of reducing the reduction of lower modes.

[0084] The effective length and effective cross-sectional area of ​​the air passage can be determined by formulas (1) to (3). As an alternative, such as... Figure 4 As shown, when the air channel includes the partition 21, the effective length and effective cross-sectional area of ​​the partition 21 can be slightly increased to compensate for the slight increase in acoustic impedance caused by using multiple partitions 21.

[0085] To ensure simpler mechanical implementation, all air passages have the same cross-section, instead of being scaled proportionally as in formula (2). Alternatively, the effective length of the air passage is determined by formula (4): Calculations show that, for example Figure 4 As shown, when the air passage includes the partition 21, To achieve the required acoustic quality, the length of the corresponding individual partition 21, for The coefficient, N, is the total number of partitions 21. The effective length of the partition 21. Figure 4 The total number of middle partitions 21 is 4, that is, N is 4.

[0086] In embodiments of the present invention, such as Figure 4 As shown, when the air passage includes a partition 21, the effective length and effective cross-sectional area of ​​the partition 21 can be approximately determined by formulas (1) to (4), and the effective length and effective cross-sectional area of ​​the partition 21 can be finely adjusted according to the shape of the cross-section of the partition 21 and other constraints.

[0087] In embodiments of the present invention, such as Figure 4As shown, when the air channel includes partitions 21, the total number N of partitions 21 can be freely chosen. When N is a smaller number, it will not redistribute and attenuate higher modes as effectively as when N is a larger number. However, a larger number will make the individual area of ​​each partition 21 smaller, resulting in gradually higher acoustic damping, which in turn will attenuate the main resonance of the required acoustic resonator.

[0088] As an alternative, Figure 7 A schematic diagram of another resonator provided in an embodiment of the present invention is shown below. Figure 7 As shown, the resonator includes: at least one air cavity 1 and a plurality of air channels communicating with the air cavity 1; the air cavity 1 is tuned with the air channels to generate one or more acoustic resonances. The resonator also includes: an acoustic port 3 disposed on at least one air cavity 1.

[0089] In this embodiment of the invention, the air channel includes pipe 2.

[0090] As an alternative, multiple pipes 2 are disposed on different sidewalls 11, such as... Figure 7 As shown, the air cavity 1 includes multiple sidewalls 11. For example, the multiple sidewalls 11 include a first surface 111, a second surface 112, and a third surface 113. The first surface 111 and the second surface 112 are adjacent to each other, the first surface 111 and the third surface 113 are adjacent to each other, and the second surface 112 and the third surface 113 are opposite to each other. A portion of the multiple air channels are located on the first surface 111, a portion on the second surface 112, and a portion on the third surface 113. For example, a tube 2 disposed on the second surface 112 bends in the extending direction of a tube 2 disposed on the first surface 111, and a tube 2 disposed on the third surface 113 bends in the extending direction of a tube 2 disposed on the first surface 111.

[0091] In this embodiment of the invention, the air channel can extend partially into the air cavity, or the air channel can extend completely into the air cavity; this case will not be specifically drawn.

[0092] In this embodiment of the invention, if the outer space connected to the outer end of pipe 2 is very narrow and cannot provide sufficient airflow space, then as follows: Figure 7 Setting up multiple tubes 2 in the middle has advantages.

[0093] As an alternative, Figure 8 A schematic diagram of another resonator provided in an embodiment of the present invention is shown below. Figure 8 As shown, the resonator includes: at least one air cavity 1 and a plurality of air channels communicating with the air cavity 1; the air cavity 1 is tuned with the air channels to generate one or more acoustic resonances. The resonator also includes: an acoustic port 3 disposed on at least one air cavity 1.

[0094] In this embodiment of the invention, the air channel includes pipe 2.

[0095] In this embodiment of the invention, the axis of tube 2 can be bent into any shape. For example... Figure 8 As shown, the axes of multiple pipes 2 are all bent to one side, and multiple bent pipes 2 are arranged on the side wall 11. The inlets of multiple pipes 2 converge on the side close to the side wall 11, so that the inlets of multiple pipes 2 are connected, and the outlets of multiple pipes 2 converge on the side away from the side wall 11, so that the outlets of multiple pipes 2 are connected, and the middle portions of multiple pipes 2 are spaced apart.

[0096] In this embodiment of the invention, the shape of the tube can be spiral, straight, or partially straight.

[0097] In this embodiment of the invention, the two ends of the tube include rounded corner structures or flared structures, which will not be specifically drawn.

[0098] As an alternative, Figure 9 A schematic diagram of another resonator provided in an embodiment of the present invention is shown below. Figure 9 As shown, the resonator includes: at least one air cavity 1 and a plurality of air channels communicating with the air cavity 1; the air cavity 1 is tuned with the air channels to generate one or more acoustic resonances. The resonator also includes: an acoustic port 3 disposed on at least one air cavity 1.

[0099] In this embodiment of the invention, the axis of tube 2 can be bent into any shape. For example... Figure 9 As shown, the axes of multiple pipes 2 are all bent to one side, and the multiple bent pipes 2 are disposed on the side wall 11. The inlets of the multiple pipes 2 converge on the side near the side wall 11, connecting the inlets of the multiple pipes 2, and the outlets of the multiple pipes 2 converge on the side away from the side wall 11, connecting the outlets of the multiple pipes 2. The middle portions of the multiple pipes 2 are spaced apart. When the air passage includes pipes 2, one end of pipe 2 is connected to an air cavity 1, and the other end of pipe 2 is connected to external airflow 4.

[0100] In this embodiment of the invention, the external air volume includes: an air channel, an air cavity, or an acoustic resonator.

[0101] In this embodiment of the invention, the external air volume can represent the internal air volume within the electronic device. The air coverage of the space between electronic devices and all internal components is typically very complex. If multiple tubes can be connected to various parts of the space, the resulting sound pressure can more effectively couple the resonator's air contraction within the space, thereby improving sound quality.

[0102] In the technical solution provided by the embodiments of the present invention, the resonator includes: at least one air cavity and multiple air channels communicating with the air cavity. By tuning through the air cavity and the air channels communicating with the air cavity, the required acoustic quality and low acoustic damping can be reasonably maintained, while higher modes are allocated in a large frequency range. The resonance peak caused by the higher modes in the frequency response of the resonator can be attenuated so as not to interfere with the desired performance of the resonator.

[0103] In the technical solution provided by the embodiments of the present invention, the airflow at one or both ends of the separated air channels will naturally be distributed over a greater distance, rather than being entirely distributed at a single end. This can be advantageous when the air channels are connected to narrow or geometrically complex air spaces, which would otherwise be difficult to accommodate large flow rates from a single air channel without causing flow noise or other artifacts.

[0104] In the technical solution provided by the embodiments of the present invention, there is no interruption along any given length of air channel. This avoids the problem of flow noise that may occur if a single air channel is equipped with parallel resonators that exhibit edge-like defects. Through the technical solution provided by the embodiments of the present invention, radial modes can be shifted to higher frequencies.

[0105] This invention provides another resonator. The resonator in this embodiment differs from the resonator embodiments described above in that the air channel includes a groove. For a detailed description, please refer to the embodiments of the resonator described above; it will not be repeated here. In this embodiment, the groove is made of a rigid material. As an alternative, the groove can be covered by a component of another resonator or an adhesive; this case will not be specifically illustrated.

[0106] In the embodiments of the present invention, the above Figure 2 , Figure 4 , Figure 7 , Figure 8 or Figure 9 In the provided embodiments, the resonators of the resonators are all driven by a speaker. However, the resonators provided in the embodiments of the present invention may also be driven by another resonator instead of a speaker.

[0107] In this embodiment of the invention, the tube can serve as a sound port, or as part of a sound port, and such a tube can be disposed in a bandpass speaker structure so that the sound port can be tuned to a lower frequency than usual.

[0108] In this embodiment of the invention, advantages can be provided in all structures that require the use of long tubes, where, if the tube is long enough, it can lead to one or more unnecessary additional resonances compared to the acoustic wavelength. Due to its higher acoustic mode, long tubes are typically coupled to an air cavity and function as Helmholtz resonators. This embodiment of the invention provides the advantage of using a set of tubes instead of a single tube to act as acoustic mass rather than a long tube acting as a Helmholtz resonator.

[0109] Figure 10 A schematic diagram illustrating the application of a resonator for related technologies. Figure 10 This shows a simulation image of a resonator in a higher mode in a related technology, such as... Figure 10 As shown, the right half of the graph contains four peaks. The higher sound pressure level at these peaks indicates greater losses in the resonator, resulting in greater attenuation at these peaks. In related technologies, these higher-frequency resonances can interfere with the acoustic structure, thus failing to guarantee the desired performance of the resonator.

[0110] For example, one might expect an acoustic low-pass or band-pass filter effect with only one resonance at its cutoff frequency, but due to the additional longitudinal mode ( Figure 7 As shown by the spikes), there is also a certain narrow range that may be passed through at a relatively high frequency, which may result in other unwanted artifacts.

[0111] Figure 11 A schematic diagram illustrating another application of a resonator for related technologies. Figure 11 This illustrates the application of acoustic damping. Figure 10 The simulation results suggest that adding acoustic damping to one end of the air channel... Figure 11 The damping of the main resonance is significantly higher, which attenuates the main resonance and thus cannot guarantee the desired performance of the resonator.

[0112] Figure 12 This is a schematic diagram illustrating the application of a resonator according to an embodiment of the present invention. Figure 12 The illustration shows the application of embodiments of the present invention. Figure 10 The simulation results Figure 12 The total number of air channels for the resonator shown is 6, that is, 6 parallel tubes, partitions or grooves, and the constant r is 1.8.

[0113] like Figure 12 As shown, higher modes are significantly attenuated, having only a minor effect on the main resonance slightly above 1000 Hz. Compared to Figure 10 , Figure 12 The lower sound pressure levels at the multiple peaks slightly above 1000 Hz in the right half of the graph indicate lower losses in the resonator, resulting in less attenuation at the peaks and thus ensuring the resonator's desired performance. Compared to Figure 10 or Figure 11 The radial pattern shown, Figure 12 The radial modes in the resonator are shifted to higher frequencies, thus ensuring the desired performance of the resonator.

[0114] This invention provides an electronic device, which includes electrical devices composed of microelectronic components, such as speakers, headphones, computers, or watches.

[0115] An electronic device provided in this embodiment of the invention includes the above-described... Figure 2 , Figure 4 , Figure 7 , Figure 8 or Figure 9 For a detailed description of the resonator in the provided embodiments, please refer to the embodiments of the resonator described above, which will not be repeated here.

[0116] In the technical solution provided by the embodiments of the present invention, the resonator includes: at least one air cavity and multiple air channels communicating with the air cavity. By tuning through the air cavity and the air channels communicating with the air cavity, the required acoustic quality and low acoustic damping can be reasonably maintained, while higher modes are allocated in a large frequency range. The resonance peak caused by the higher modes in the frequency response of the resonator can be attenuated so as not to interfere with the desired performance of the resonator.

[0117] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A resonator characterized by, include: At least one air cavity and a plurality of air channels communicating with said air cavity; The air cavity is tuned to the air channel to produce one or more acoustic resonances; The air channel includes a plurality of tubes arranged sequentially along a first direction. One end of the plurality of tubes is connected to an air cavity and the other end is connected to an external air volume. The external air volume includes: the air channel, the air cavity, or an acoustic resonator. The ends of the plurality of tubes connected to the air cavity are interconnected, the ends of the plurality of tubes connected to the external air volume are interconnected, the middle sections of the plurality of tubes are spaced apart along the first direction and all bend toward one side along the first direction, and the middle section of one tube is partially housed in the area enclosed by the middle sections of the adjacent tubes located on the side facing the bending direction.

2. The resonator according to claim 1, characterized in that, Also includes: Acoustic ports are provided on at least one air cavity.

3. The resonator according to claim 1, characterized in that, The cross-sectional shape of the tube may be circular, rectangular, or irregular.

4. The resonator according to claim 1, characterized in that, The two ends of the tube include rounded corner structures or flared structures.

5. The resonator according to claim 1, characterized in that, The air passage includes partitions inside a single tube; A partition wall is provided between adjacent partitions.

6. The resonator according to claim 1, characterized in that, Along the first direction, the effective length of the plurality of air channels gradually decreases.

7. The resonator according to claim 6, characterized in that, Among the effective lengths of the multiple air channels, the ratio of the largest effective length to the smallest effective length is less than 2.

8. The resonator according to claim 7, characterized in that, The effective length of the air passage is determined by the formula. The calculation shows that, The length of a single air channel is required to achieve the desired acoustic quality. for coefficient, Let n be the effective length of the air channel, and n be the label of the air channel along the first direction.

9. The resonator according to claim 7, characterized in that, The effective length of the air passage is determined by the formula. The calculation shows that, The length of a single air channel is required to achieve the desired acoustic quality. for The coefficient, where N is the total number of air channels. Let n be the effective length of the air channel, and n be the label of the air channel along the first direction.

10. The resonator according to claim 1, characterized in that, The effective cross-sectional area of ​​the air passage is determined by the formula. The calculation shows that, The cross-sectional area of ​​a single air channel is required to achieve the desired acoustic quality. for The coefficient, where N is the total number of air channels. Let n be the effective cross-sectional area of ​​the air passage, and n be the label of the air passage along the first direction. The length of the corresponding single air channel to achieve the desired sound quality.

11. The resonator according to claim 10, characterized in that, The coefficient Where N is the total number of air channels and r is a constant.

12. The resonator according to claim 1, characterized in that, The air cavity includes a first surface, a second surface, and a third surface, wherein the first surface and the second surface are adjacent to each other, the first surface and the third surface are adjacent to each other, the second surface and the third surface are opposite to each other, and some of the multiple air channels are disposed on the first surface.

13. The resonator according to claim 1, characterized in that, The air passage may extend partially into the air cavity, or the entire air passage may extend into the air cavity.

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