Covering structure, sound production package and manufacturing method of sound

Abstract

The invention discloses a covering structure, a sound production packaging body and a manufacturing method of the sound production packaging body, and the covering structure is arranged in the sound production packaging body and comprises a tubular structure, a first cavity and a first connecting structure. The tubular structure has a first sound opening and a second sound opening, wherein a tubular cavity connected between the first sound opening and the second sound opening is present within the tubular structure. The first cavity exists in the first cavity, and the first cavity is connected to the tubular cavity of the tubular structure. The first connecting structure is connected between the tubular structure and the first cavity, the first connecting structure is arranged between the first sound opening and the second sound opening, and the first cavity of the first cavity is connected to the tubular cavity of the tubular structure through the first connecting structure. An acoustic path of the covering structure is formed between the first sound opening and the second sound opening.

Description

Technical Field

[0001] The present invention relates to a covering structure, a sound-generating package and a method for manufacturing the sound-generating package, and in particular to a covering structure capable of appropriately affecting the sound pressure level (SPL) of acoustic waves, a sound-generating package having the covering structure, and a method for manufacturing the sound-generating package. Background Art

[0002] Micro sound generating components (e.g., micro electromechanical system (MEMS) speakers) are developing rapidly and are widely used in various electronic devices due to their small size. For example, MEMS speakers can use thin film piezoelectric materials as actuators and single crystal silicon thin films as diaphragms, and they are formed by at least one semiconductor process.

[0003] Since the micro sound element is small in size and fragile in structure, a covering structure may be used to cover and protect the micro sound element, so as to form a sound package including the micro sound element and the covering structure, wherein the covering structure may have an acoustic path to propagate acoustic waves.

[0004] Generally speaking, a sound-emitting package needs to be properly designed to have a suitable frequency response so that the acoustic waves generated by the sound-emitting package meet the requirements. In some cases, the sound-emitting package can be designed based on the sound-emitting device that is to contain the sound-emitting package. For example, the acoustic waves generated by a hearing aid (a sound-emitting device) need to meet specific standards so that the user of the hearing aid can hear the sound. However, it is difficult and costly to design a sound-emitting package and / or a sound-emitting device to meet the requirements of a hearing aid through miniature sound-emitting elements. Therefore, there is a need to improve the prior art. Summary of the invention

[0005] Therefore, the main object of the present invention is to provide a covering structure comprising a tubular structure and at least one cavity to appropriately affect the sound pressure level (SPL) of acoustic waves. In addition, the present invention also provides a sound-generating package having the covering structure and a method for manufacturing the sound-generating package.

[0006] Another embodiment of the present invention provides a covering structure, which is arranged in a sound-emitting package and includes a tubular structure, a first cavity and a first connecting structure. The tubular structure has a first sound opening and a second sound opening, wherein a tubular cavity connected between the first sound opening and the second sound opening exists in the tubular structure. The first cavity exists in the first cavity, and the first cavity is connected to the tubular cavity of the tubular structure. The first connecting structure is connected between the tubular structure and the first cavity, wherein the first connecting structure is between the first sound opening and the second sound opening, and the first cavity of the first cavity is connected to the tubular cavity of the tubular structure through the first connecting structure. The acoustic path of the covering structure is formed between the first sound opening and the second sound opening.

[0007] Another embodiment of the present invention provides a sound-generating package, which includes a sound-generating element and a covering structure. The sound-generating element is used to generate acoustic waves, the covering structure covers the sound-generating element, and the covering structure includes a tubular structure, a first cavity and a first connecting structure. The tubular structure has a first sound opening and a second sound opening, wherein a tubular cavity connected between the first sound opening and the second sound opening exists in the tubular structure. The first cavity exists in the first cavity, and the first cavity is connected to the tubular cavity of the tubular structure. The first connecting structure is connected between the tubular structure and the first cavity, wherein the first connecting structure is between the first sound opening and the second sound opening, and the first cavity of the first cavity is connected to the tubular cavity of the tubular structure through the first connecting structure. An acoustic path of the covering structure is formed between the first sound opening and the second sound opening, and acoustic waves propagate through the acoustic path.

[0008] Another embodiment of the present invention provides a method for manufacturing a sound-generating package, the manufacturing method comprising: forming a sound-generating element, wherein the sound-generating element is used to generate acoustic waves; and forming a covering structure to cover the sound-generating element. The covering structure comprises a tubular structure, a first cavity, and a first connecting structure. The tubular structure has a first sound opening and a second sound opening, wherein a tubular cavity connected between the first sound opening and the second sound opening exists in the tubular structure. The first cavity exists in the first cavity, and the first cavity is connected to the tubular cavity of the tubular structure. The first connecting structure is connected between the tubular structure and the first cavity, wherein the first connecting structure is between the first sound opening and the second sound opening, and the first cavity of the first cavity is connected to the tubular cavity of the tubular structure through the first connecting structure. An acoustic path of the covering structure is formed between the first sound opening and the second sound opening, and acoustic waves propagate through the acoustic path.

[0009] After reading the following detailed description of the embodiments illustrated with various figures, the purpose of the present invention should be clear to those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1FIG. 4 is a cross-sectional schematic diagram of a covering structure according to an embodiment of the present invention.

[0011] Figure 2 and Figure 3 Shown Figure 1 Schematic diagram of the covering structure at different viewing angles.

[0012] Figure 4 FIG. 4 is a cross-sectional schematic diagram of a sound-emitting package according to an embodiment of the present invention.

[0013] Figure 5 The frequency response of the sound-generating element is shown. Figure 4 Schematic diagram of the frequency response of the sound package and the upper and lower frequency responses specified by the ANSI S3.22 standard.

[0014] Figure 6 Shown Figure 4 The frequency response of the sound-generating package and Figure 4 Schematic diagram of the transmission loss caused by the covering structure.

[0015] [Explanation of symbols]

[0016] 100: Covering structure

[0017] 110: Tubular structure

[0018] 110a: Tubular cavity

[0019] 120: Cavity

[0020] 122: First cavity

[0021] 122a: First cavity

[0022] 124: Second cavity

[0023] 124a: Second cavity

[0024] 126: The third cavity

[0025] 126a: Third cavity

[0026] 130: Connection structure

[0027] 132: First connection structure

[0028] 134: Second connection structure

[0029] 136: Third connection structure

[0030] 200: Sound package

[0031] 210: Substrate

[0032] 210p: Bottom opening

[0033] 220: Sounding element

[0034] 222: Anchoring Structure

[0035] 224: Diaphragm

[0036] 226: Actuator

[0037] BS: Block structure

[0038] D1: Valley

[0039] DL1: First transmission loss valley

[0040] DL2: Second transmission loss valley

[0041] DL3: The third transmission loss valley

[0042] ES: Space

[0043] OP1: The first voice speaks

[0044] OP2: Second voice speaks

[0045] P1: First Peak

[0046] P2: Second Peak

[0047] P3: The third peak

[0048] PL: Transmission loss peak

[0049] SF1: First Surface

[0050] SF2: Second Surface

[0051] SP1: First specified peak

[0052] SP2: Second specified peak

[0053] SP3: Third specified peak

[0054] SS: Support structure

[0055] X,Y,Z: Direction DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to further understand the present invention, the preferred embodiments of the present invention, the typical materials or parameter ranges of the key components listed will be described in detail below, and the components of the present invention and the desired effects will be described in conjunction with the marked drawings. It should be noted that the drawings are simplified schematic diagrams, and the materials and parameter ranges of the key components are described based on the current technology. Therefore, only the components and combination relationships related to the present invention are shown to provide a clearer description of the basic architecture, implementation method or operation of the present invention. The actual components and layout may be more complex, and the materials or parameter ranges used may change with the development of future technology. In addition, for the convenience of explanation, the components shown in the drawings of the present invention may not be drawn in proportion to the actual number, shape, and size, and the details may be adjusted according to the design requirements.

[0057] In the following description and claims, words such as "include", "contain", "have" and the like are open-ended words, and therefore should be interpreted as "including but not limited to..." Therefore, when the terms "include", "contain" and / or "have" are used in the description of the present invention, they specify the existence of corresponding features, regions, steps, operations and / or components, but do not exclude the existence of one or more corresponding features, regions, steps, operations and / or components.

[0058] In the following specification and claims, when a component or a film layer is referred to as being "connected to" another component or film layer, it may be directly connected to the other component or film layer, or there may be an intervening component or film layer between the two. Conversely, when a component is referred to as being "directly connected to" another component or film layer, there may be no intervening component or film layer between the two.

[0059] In the following description and claims, when "A1 component is formed by B1", B1 exists in the formation of A1 component or B1 is used in the formation of A1 component, and the formation of A1 component does not exclude the existence and use of one or more other features, regions, steps, operations and / or components.

[0060] In the following description and claims, the term "cavity" refers to an object having an empty space inside it, and the term "cavity" refers to the empty space inside the cavity. In other words, the cavity of the cavity is the empty space existing in the cavity, and the cavity is the shell of the cavity.

[0061] In the following description and claims, the term "substantially" means that a slight deviation may or may not exist. For example, the terms "substantially parallel" and "substantially along" mean that the angle between the two components may be less than or equal to a specific angle threshold, such as 10 degrees, 5 degrees, 3 degrees, or 1 degree. For example, the term "substantially aligned" means that the deviation between the two components may be less than or equal to a specific difference threshold, such as 2 micrometers (μm) or 1 micrometer. For example, the term "substantially the same" means that the deviation is within a given value or a given range, such as within 10%, 5%, 3%, 2%, 1% or 0.5%.

[0062] In the following description and claims, the term "horizontal direction" refers to a direction parallel to a horizontal plane, the term "horizontal plane" refers to a plane parallel to the direction X and the direction Y in the drawings (that is, the direction X and the direction Y of the present invention can be regarded as horizontal directions), and the terms "vertical direction" and "top view direction" refer to directions parallel to the direction Z and perpendicular to the horizontal direction in the drawings, wherein the directions X, Y, and Z are perpendicular to each other. In the following description and claims, the term "top view" refers to the viewing result along the vertical direction. In the following description and claims, the term "section" refers to the viewing result of a structure cut along the vertical direction and viewed from the horizontal direction.

[0063] The ordinal numbers used in the specification and claims, such as "first", "second", etc., are used to modify the elements. They do not imply or represent any previous ordinal numbers of the elements, nor do they represent the order of one element to another element, or the order of the manufacturing method. The use of the ordinal numbers is only used to make the element with a certain name clearly distinguishable from another element with the same name. The claims and the specification may not use the same words. Accordingly, the first component in the specification may be the second component in the claims.

[0064] It should be noted that the following embodiments can replace, reorganize, or mix features in several different embodiments to complete other embodiments without departing from the spirit of the present invention. The features between the embodiments can be mixed and matched as long as they do not violate the spirit of the invention or conflict with each other.

[0065] The present invention provides a covering structure for being arranged in a sound-generating package, wherein the covering structure is used to cover and protect a sound-generating element in the sound-generating package. In the present invention, the sound-generating element is used to perform acoustic transformation to transform a signal (e.g., an electrical signal or other suitable type of signal) into an acoustic wave. In some embodiments, the sound-generating element may be a speaker, a micro speaker or other suitable element to transform an electrical signal into an acoustic wave, but is not limited thereto.

[0066] Please refer to Figures 1 to 3 , Figure 1 FIG. 2 is a cross-sectional schematic diagram of a covering structure according to an embodiment of the present invention. Figure 2 and Figure 3 Shown Figure 1 Schematic diagram of the covering structure at different viewing angles, where Figure 2 and Figure 3 Shown from different perspectives Figure 1 An example of the exterior of the covering structure is shown. Figure 1 As shown, the covering structure 100 includes a tubular structure 110 having a first sound opening OP1 and a second sound opening OP2, wherein the tubular cavity 110a is an empty space existing in the tubular structure 110 and connected between the first sound opening OP1 and the second sound opening OP2. Figure 1 As shown, the tubular structure 110 may extend along a direction Z.

[0067] The tubular structure 110 can be designed according to the requirements, wherein the tubular structure 110 can have one cross-sectional shape or multiple cross-sectional shapes, and the tubular structure 110 can have one cross-sectional size or multiple cross-sectional sizes. Figure 1 In the embodiment, the tubular structure 110 may be a cylindrical tube with a certain cross-sectional size, and the first sound opening OP1 and the second sound opening OP2 may be circular, but the present invention is not limited thereto.

[0068] like Figure 1 As shown, the covering structure 100 includes at least one cavity 120, and the cavity 120 is connected to the tubular structure 110, wherein the number of cavities 120 can be designed according to demand. In addition, the covering structure 100 includes at least one connecting structure 130, and the connecting structure 130 is used to connect the cavity of the cavity 120 to the tubular cavity 110a of the tubular structure 110. In the present invention, the acoustic path of the covering structure 100 is formed between the first sound opening OP1 and the second sound opening OP2, so that the tubular structure 110, the cavity 120 and the connecting structure 130 can affect the acoustic waves passing through the acoustic path, wherein the first sound opening OP1 is the sound entrance of the covering structure 100, and the second sound opening OP2 is the sound exit of the covering structure 100. In the present invention, the effects of the tubular structure 110, the cavity 120 and the connecting structure 130 on the acoustic waves can be controlled by adjusting the size, quantity and position of the tubular structure 110, the cavity 120 and the connecting structure 130 so that the acoustic waves passing through the covering structure 100 meet the requirements.

[0069] exist Figure 1 In the embodiment, the covering structure 100 includes a first cavity 122, wherein a first cavity 122a exists in the first cavity 122 and is connected to the tubular cavity 110a of the tubular structure 110. Figure 1In the embodiment, the covering structure 100 includes a first connecting structure 132, which is connected between the tubular structure 110 and the first cavity 122, so that the first cavity 122a of the first cavity 122 is connected to the tubular cavity 110a of the tubular structure 110 through the first air channel in the first connecting structure 132. Figure 1 In the embodiment, the first connection structure 132 is between the first sound opening OP1 and the second sound opening OP2.

[0070] Optionally, the cover structure 100 may include a second cavity 124, wherein a second cavity 124a may exist within the second cavity 124 and be connected to the first cavity 122a of the first cavity 122. Figure 1 In the embodiment, the covering structure 100 may include a second connecting structure 134, and the second connecting structure 134 is connected between the first cavity 122 and the second cavity 124, so that the second cavity 124a of the second cavity 124 can be connected to the first cavity 122a of the first cavity 122 through the second air channel in the second connecting structure 134 (that is, the second cavity 124a of the second cavity 124 can be connected to the tubular cavity 110a of the tubular structure 110 through the second air channel, the first cavity 122a and the first air channel). Figure 1 In the embodiment, the second connection structure 134 may also be between the first sound opening OP1 and the second sound opening OP2.

[0071] Optionally, the covering structure 100 may include a third cavity 126, wherein a third cavity 126a may exist within the third cavity 126 and be connected to the tubular cavity 110a of the tubular structure 110. Figure 1 In the embodiment, the covering structure 100 may include a third connecting structure 136 connected between the tubular structure 110 and the third cavity 126, so that the third cavity 126a of the third cavity 126 can be connected to the tubular cavity 110a of the tubular structure 110 through the third air channel in the third connecting structure 136. Figure 1 In the embodiment, the third connection structure 136 may also be between the first sound opening OP1 and the second sound opening OP2.

[0072] Figure 1 An example of the covering structure 100 is shown. The sizes and positions of the tubular structure 110, the cavity 120 and the connecting structure 130 are not shown in FIG. Figure 1 For example (such as Figure 1 As shown in FIG. 1 , the tubular structure 110 may be between the first cavity 122 and the third cavity 126, and the tubular structure 110 may be between the second cavity 124 and the third cavity 126, but the present invention is not limited thereto. Figure 1 As shown in FIG. 1 , the first cavity 122 may be between the second cavity 124 and the second sound opening OP2, but the present invention is not limited thereto. Figure 1 As shown), in the direction Z, the distance between the third cavity 126 and the second sound opening OP2 may be smaller than the distance between the first cavity 122 and the second sound opening OP2, but is not limited thereto.

[0073] For example (such as Figure 1 As shown in FIG. 1 , the first connection structure 132 may be between the first sound opening OP1 and the third connection structure 136, and the third connection structure 136 may be between the first connection structure 132 and the second sound opening OP2, but the present invention is not limited thereto. Figure 1 As shown in FIG. 1 , the first connection structure 132 may be connected to a position in the first cavity 122 that is closer to the first sound opening OP1, but the present invention is not limited thereto. Figure 1 As shown in FIG. 1 , the second connection structure 134 may be connected to the middle position of the second cavity 124 and the middle position of the first cavity 122, but is not limited thereto. Figure 1 As shown in FIG. 1 , the third connection structure 136 may be connected to a position in the third cavity 126 that is closer to the second sound opening OP2 , but is not limited thereto.

[0074] The shapes of the cavity 120 and the connection structure 130 can be designed according to the requirements. Figure 1 As shown in FIG. 1 , the first cavity 122, the second cavity 124 and the third cavity 126 can all be quadrangular prisms, but are not limited thereto. Figure 1 As shown in FIG. 1 , the first connection structure 132 , the second connection structure 134 and the third connection structure 136 may all be cylindrical tubes, but are not limited thereto.

[0075] The dimensions of the cavity 120 and the connection structure 130 can be designed according to the requirements. Figure 1 As shown in FIG. 1 , the size of the first cavity 122 may be smaller than the size of the third cavity 126, and the size of the third cavity 126 may be smaller than the size of the second cavity 124, but the present invention is not limited thereto.

[0076] For example (such as Figure 1 As shown in FIG. 1 , the inner diameter (diameter) and length of the tubular structure 110 may be 0.7 mm and 10 mm, respectively, but are not limited thereto. Figure 1 As shown in FIG. 1 , the three-dimensional dimensions of the first cavity 122 may be 3.4 mm, 2.59 mm, and 4 mm, respectively; the three-dimensional dimensions of the second cavity 124 may be 3.4 mm, 5.18 mm, and 4 mm, respectively; and the three-dimensional dimensions of the third cavity 126 may be 3.4 mm, 4.44 mm, and 4 mm, respectively, but are not limited thereto. For example (as shown in FIG. Figure 1As shown in the figure, the inner diameter (diameter) and length of the first connecting structure 132 may be 0.432 mm and 0.584 mm, respectively, the inner diameter (diameter) and length of the second connecting structure 134 may be 0.54 mm and 0.6 mm, respectively, and the inner diameter (diameter) and length of the third connecting structure 136 may be 0.54 mm and 0.287 mm, respectively, but are not limited thereto.

[0077] It should be noted that the dimensions of the tubular structure 110, the cavity 120 and the connecting structure 130 of the present invention are not limited to the above values. For example, if the position of at least one of the tubular structure 110, the cavity 120 and the connecting structure 130 is adjusted, the dimensions of at least one of the tubular structure 110, the cavity 120 and the connecting structure 130 will be adjusted accordingly to maintain the effect of the covering structure 100.

[0078] The cover structure 100 having the above-mentioned design can be achieved by any suitable method. In some embodiments, Figures 1 to 3 As shown, the covering structure 100 may also include a block structure BS, wherein the tubular structure 110, the cavity 120 and the connecting structure 130 may belong to the block structure BS, and the tubular structure 110 may pass through the block structure BS. In other words, the tubular structure 110 and the cavity 120 are inner walls in the block structure BS and surround the cavities thereof respectively, and the connecting structure 130 is an inner wall in the block structure BS and surrounds the air passages thereof respectively.

[0079] exist Figures 1 to 3 In the block structure BS, the block structure BS may include a first surface SF1 and a second surface SF2, the first surface SF1 and the second surface SF2 are opposite to each other in a direction Z, the first sound opening OP1 may belong to the first surface SF1 of the block structure BS, and the second sound opening OP2 may belong to the second surface SF2 of the block structure BS.

[0080] In addition, if Figure 1 and Figure 2 As shown, the cover structure 100 may further include a support structure SS, the support structure SS connected to the block structure BS, wherein the support structure SS protrudes outward from the first surface SF1 and surrounds the first sound opening OP1. Figure 2 As shown in FIG. 1 , the support structure SS and the block structure BS may be an integrally formed structure (i.e., the support structure SS and the block structure BS may be included and integrated into one structure), but the invention is not limited thereto. When the covering structure 100 is used in a sound package and covers the sound element of the sound package, the support structure SS may be used to create a space in which the sound element can be disposed.

[0081] Please refer to Figure 4 , Figure 4 FIG. 2 is a cross-sectional schematic diagram of a sound-emitting package according to an embodiment of the present invention. Figure 4As shown, the sound package 200 includes a substrate 210 , a sound element 220 and the above-mentioned covering structure 100 , wherein the sound element 220 is disposed on the substrate 210 and is used to generate acoustic waves, and the covering structure 100 is disposed on the substrate 210 and the sound element 220 and covers the sound element 220 .

[0082] The substrate 210 can be designed according to the requirements. The substrate 210 can be hard or flexible, wherein the substrate 210 may include silicon, germanium, glass, plastic, quartz, sapphire, metal, polymer (e.g., polyimide (PI), polyethylene terephthalate (PET)), any suitable material or a combination thereof. In one example, the substrate 210 may be a circuit board including a laminate (e.g., a copper clad laminate (CCL)), a land grid array board (LGA board), or any other suitable board containing a conductive material, but is not limited thereto. Figure 4 In the embodiment, the normal direction of the substrate 210 may be parallel to the direction Z. Figure 4 In the embodiment, the substrate 210 may include a bottom opening 210p.

[0083] The sound element 220 and the cover structure 100 may be disposed on the substrate 210 by any suitable method and any suitable adhesive material (e.g., conductive adhesive material or insulating adhesive material). For example, the sound element 220 may be disposed on the substrate 210 by a conductive adhesive material (e.g., solder), so that the sound element 220 may be electrically connected to the conductive elements in the substrate 210. For example, the support structure SS of the cover structure 100 may be connected to the substrate 210 by an adhesive material, so that a space ES may be formed between the substrate 210 and the cover structure 100, and the sound element 220 may be disposed in the space ES and surrounded by the support structure SS.

[0084] exist Figure 4 In the embodiment, since the first sound opening OP1 (ie, the sound entrance) of the cover structure 100 faces the sound generating element 220 , the acoustic wave generated by the sound generating element 220 will propagate through the acoustic path of the cover structure 100 .

[0085] like Figure 4 As shown, the sound-generating element 220 includes an anchoring structure 222, a diaphragm 224, and an actuator 226. The diaphragm 224 is anchored to the anchoring structure 222, and the actuator 226 is used to actuate the diaphragm 224 to generate acoustic waves. In some embodiments, the anchoring structure 222 can be disposed on the outside of the diaphragm 224, and the actuator 226 can be disposed on the diaphragm 224.

[0086] The diaphragm 224 and the anchoring structure 222 may include any suitable material. In some embodiments, the diaphragm 224 and the anchoring structure 222 may each include silicon (e.g., monocrystalline silicon or polycrystalline silicon), silicon compounds (e.g., silicon carbide, silicon oxide), germanium, germanium compounds, gallium, gallium compounds (e.g., gallium nitride, gallium arsenide), stainless steel, other suitable materials or combinations thereof, but are not limited thereto. In some embodiments, the diaphragm 224 and the anchoring structure 222 may have the same material.

[0087] During the operation of the sound-emitting element 220, the diaphragm 224 may be actuated to move, and the anchoring structure 222 may be fixed. In other words, during the operation of the sound-emitting element 220, the anchoring structure 222 may be a fixed end (or a fixed edge) relative to the diaphragm 224. For example, the diaphragm 224 may be actuated to move upward and downward, wherein the terms "upward movement" and "downward movement" mean that the diaphragm 224 moves substantially along the normal direction of the substrate 210 (e.g., in the direction of the substrate 210). Figure 4 , the diaphragm 224 substantially moves along direction Z).

[0088] The diaphragm 224 can be designed according to the requirements. For example, the diaphragm 224 can include a plurality of sub-sections and at least one slit, wherein the sub-sections can be separated from each other by the slit, but the present invention is not limited thereto. It should be noted that the slit has a sufficiently small width to be a narrow slit.

[0089] The actuator 226 has a monotonic electromechanical conversion function for the movement of the diaphragm 224. In some embodiments, the actuator 226 may include a piezoelectric actuator, an electrostatic actuator, a nanoscopic-electrostatic-drive (NED) actuator, an electromagnetic actuator, or any other suitable actuator, but is not limited thereto. For example, in one embodiment, the actuator 226 may include a piezoelectric actuator, and the piezoelectric actuator may include, for example, two electrodes and a piezoelectric material layer (e.g., lead zirconate titanate (PZT)) disposed between the two electrodes, wherein the piezoelectric material layer may actuate the diaphragm 224 according to a driving signal (e.g., a driving voltage and / or a driving voltage difference between the two electrodes) received by the electrode, but is not limited thereto. For example, in another embodiment, the actuator 226 may include an electromagnetic actuator (e.g., a planar coil), wherein the electromagnetic actuator may actuate the diaphragm 224 according to a received driving signal (e.g., a driving current) and a magnetic field (i.e., the diaphragm 224 may be actuated by an electromagnetic force), but the invention is not limited thereto. For example, in another embodiment, the actuator 226 may include an electrostatic actuator (e.g., a conductive plate) or a NED actuator, wherein the electrostatic actuator or the NED actuator may actuate the diaphragm 224 according to a received driving signal (e.g., a driving voltage) and an electric field (i.e., the diaphragm 224 may be actuated by an electrostatic force), but the invention is not limited thereto.

[0090] In some embodiments, the sound generating element 220 may be a MEMS speaker, so that the sound generating element 220 may have a small size and be formed by at least one semiconductor process, but is not limited thereto.

[0091] The first resonance frequency of the sound element 220 is the minimum resonance frequency of the sound element 220. In some embodiments, the sound element 220 has a high first resonance frequency. For example, the first resonance frequency of the sound element 220 may be greater than or equal to 10 kHz (e.g., the first resonance frequency may be in the range of 10 kHz to 20 kHz), but is not limited thereto.

[0092] In the present invention, the covering structure 100 is disposed on the sound-generating element 220 and provides an acoustic path to affect the acoustic waves passing through the acoustic path. In the present invention, the covering structure 100 causes different / multiple transmission losses to acoustic waves of different frequencies (the covering structure 100 affects the frequency response of the sound-generating package 200), thereby adjusting the sound pressure level (SPL) of acoustic waves of different frequencies. Through the appropriate design of the covering structure 100, the acoustic waves can meet the requirements of the sound-generating device including the sound-generating package 200.

[0093] In some embodiments, the sound-emitting package 200 can be used in a hearing aid (i.e., the sound-emitting device provided with the sound-emitting package 200 can be a hearing aid), so that the acoustic wave should meet the requirements of the hearing aid. For example, the American National Standards Institute (ANSI) has formulated the ANSI S3.22 standard related to hearing aids, and the frequency response of the sound-emitting package 200 must meet the ANSI S3.22 standard, so that the acoustic wave meets the requirements of the hearing aid.

[0094] Please refer to additional Figure 5 and Figure 6 , Figure 5 The frequency response of the sound-generating element is shown. Figure 4 The frequency response of the sound-generating package and the upper and lower frequency responses specified in the ANSI S3.22 standard are shown in the figure. Figure 6 Shown Figure 4 The frequency response of the sound-generating package and Figure 4 Schematic diagram of the transmission loss caused by the covering structure.

[0095] like Figure 5 In the frequency response shown, the first resonance frequency of the sound-emitting element 220 is greater than 10 kHz. In addition, in the ANSIS 3.22 standard, there are three specified peaks in the frequency range of 200 Hz to 4000 Hz, wherein the frequency of the first specified peak SP1 is 1150 Hz, the frequency of the second specified peak SP2 is 2480 Hz, and the frequency of the third specified peak SP3 is 3420 Hz. In addition, in the ANSIS 3.22 standard, the difference in sound pressure level between the upper limit frequency response and the lower limit frequency response in the frequency range of 200 Hz to 2000 Hz is 8 dB, and the difference in sound pressure level between the upper limit frequency response and the lower limit frequency response in the frequency range of 2000 Hz to 4000 Hz is 12 dB.

[0096] like Figure 4 and Figure 5 As shown, based on the design of the covering structure 100, in the frequency range of 200 Hz to 4000 Hz, the frequency response of the sound-emitting package 200 can be between the upper and lower frequency responses specified by the ANSI S3.22 standard, so that when using the sound-emitting element 220, the acoustic waves of the sound-emitting package 200 will meet the requirements of the hearing aid after passing through the acoustic path of the covering structure 100.

[0097] In the present invention, if Figure 6As shown, by causing different transmission losses to acoustic waves of different frequencies, the covering structure 100 makes the frequency response of the sound-emitting package 200 between the upper and lower frequency responses specified by the ANSI S3.22 standard in the frequency range of 200 Hz to 4000 Hz, wherein the transmission loss caused by the covering structure 100 is related to the design of the tubular structure 110, the cavity 120 and the connecting structure 130. It should be noted that the transmission loss can be calculated by the following formula: TL = 10log(W i / W t ), where TL is the transmission loss, the unit of TL is dB, Wi is the sound energy of the acoustic wave before passing through the covering structure 100, and Wt is the sound energy of the acoustic wave after passing through the covering structure 100. It should be noted that Figure 6 In the present invention, the transmission loss in the frequency range of 200 Hz to 4000 Hz is a negative value. In the present invention, the transmission loss increases as the absolute value of the transmission loss increases (ie, the more negative the value of the transmission loss is).

[0098] According to the upper and lower frequency responses set by the ANSI S3.22 standard, a sound element 220 having a high first resonance frequency (e.g., the first resonance frequency of the sound element 220 is greater than or equal to 10 kHz) is not favorable for complying with the ANSI S3.22 standard. In the present invention, the tubular structure 110 of the covering structure 100 is used to suppress and / or reduce the sound pressure level of acoustic waves above a specific frequency (e.g., 2000 Hz). In other words, due to the presence of the tubular structure 110 of the covering structure 100, after the acoustic wave passes through the tubular structure 110 of the covering structure 100, the effect of the higher first resonance frequency of the sound element 220 on the acoustic wave can be suppressed and / or reduced, so that the frequency response of the sound package 200 is close to the ANSI S3.22 standard. For example, the tubular structure 110 of the covering structure 100 can suppress and / or reduce the sound pressure level of acoustic waves in the frequency range of 2000 Hz to 10000 Hz, but is not limited thereto.

[0099] In addition, the suppression (and / or reduction) effect caused by the tubular structure 110 increases as the ratio of the area of ​​the first sound opening OP1 to the area of ​​the diaphragm 224 of the sound emitting element 220 decreases. For example, the ratio of the area of ​​the first sound opening OP1 to the area of ​​the diaphragm 224 of the sound emitting element 220 may be less than or equal to 0.2 to enhance the suppression (and / or reduction) effect caused by the tubular structure 110, but is not limited thereto. In addition, in some embodiments (such as Figure 4As shown in FIG. 1 , the area of ​​the diaphragm 224 of the sound-emitting element 220 may be similar to the area of ​​the first surface SF1 of the covering structure 100, so that the ratio of the area of ​​the first sound opening OP1 to the area of ​​the diaphragm 224 may be similar to the ratio of the area of ​​the first sound opening OP1 to the area of ​​the first surface SF1. For example, the ratio of the area of ​​the first sound opening OP1 to the area of ​​the first surface SF1 of the covering structure 100 may be less than or equal to 0.2, but is not limited thereto.

[0100] On the other hand, Figure 5 As shown, the covering structure 100 can make the frequency response of the sound-emitting package 200 have three peaks (i.e., a first peak P1, a second peak P2, and a third peak P3) in the frequency range of 200 Hz to 4000 Hz, wherein the first peak P1, the second peak P2, and the third peak P3 can respectively correspond to the first specified peak SP1, the second specified peak SP2, and the third specified peak SP3 established by the ANSI S3.22 standard. In some embodiments, the first frequency of the first peak P1 can be in the range of 1050 Hz to 1250 Hz, the second frequency of the second peak P2 can be in the range of 2230 Hz to 2630 Hz or in the range of 2280 Hz to 2680 Hz, and the third frequency of the third peak P3 can be in the range of 3300 Hz to 3700 Hz or in the range of 3220 Hz to 3620 Hz. For example, in Figure 5 In the embodiment, the first frequency may be 1150 Hz, the second frequency may be 2430 Hz, and the third frequency may be 3500 Hz, but it is not limited thereto.

[0101] like Figure 5 and Figure 6 As shown, the first peak P1, the second peak P2 and the third peak P3 of the frequency response of the sound package 200 are generated by increasing the transmission loss, wherein the first peak P1, the second peak P2 and the third peak P3 of the frequency response of the sound package 200 correspond to the first transmission loss valley DL1, the second transmission loss valley DL2 and the third transmission loss valley DL3 in the transmission loss diagram, respectively. For example, the first transmission loss valley DL1 of the first peak P1 of the frequency response of the sound-emitting package 200 may be mainly generated by the tubular structure 110, the first cavity 122 and the second cavity 124 (that is, the first peak P1 may be mainly caused by the tubular structure 110, the first cavity 122 and the second cavity 124), the second transmission loss valley DL2 of the second peak P2 of the frequency response of the sound-emitting package 200 may be mainly generated by the first cavity 122 and the second cavity 124 (that is, the second peak P2 may be mainly caused by the first cavity 122 and the second cavity 124), and the third transmission loss valley DL3 of the third peak P3 of the frequency response of the sound-emitting package 200 may be mainly generated by the third cavity 126 (that is, the third peak P3 may be mainly caused by the third cavity 126), but it is not limited to this.

[0102] For example, in Figure 6 In the embodiment, the first transmission loss valley DL1 and the first peak P1 may have the same frequency, the second transmission loss valley DL2 and the second peak P2 may have the same frequency, and the third transmission loss valley DL3 and the third peak P3 may have the same frequency, but the present invention is not limited thereto.

[0103] In addition, if Figure 5 and Figure 6 As shown, the transmission loss graph may selectively have a transmission loss peak PL, and the transmission loss peak PL may correspond to the valley D1 of the frequency response of the sound package 200, so that the frequency response of the sound package 200 is more in line with the ANSIS3.22 standard. Figure 6 As shown, the transmission loss peak PL may be between the first transmission loss valley DL1 and the second transmission loss valley DL2. For example, the frequency of the transmission loss peak PL may be 1850 Hz, and the transmission loss peak PL may be mainly generated by the second cavity 124, but not limited thereto. For example, the transmission loss peak PL and the valley D1 may have the same frequency, but not limited thereto.

[0104] For example, Figure 6 As shown, the maximum transmission loss caused by the covering structure 100 to the acoustic waves passing through the acoustic path may occur in the frequency range of 2000 Hz to 4000 Hz, but is not limited thereto. For example, the maximum transmission loss may occur in the third transmission loss valley DL3, but is not limited thereto.

[0105] According to the above content, the effect of the tubular structure 110 , the cavity 120 and the connecting structure 130 on acoustic waves can be similar to an acoustic band-pass filter.

[0106] In addition, the sound package 200 has an operating frequency range suitable for hearing aids and / or ANSI S3.22 standards, and the operating frequency range can be calculated by the following calculation method. In this calculation method, the high frequency average (HFA) is obtained by averaging the sound pressure level values ​​at 1000 Hz, 1600 Hz and 2500 Hz in the frequency response of the sound package 200, and the sound pressure level values ​​of the upper and lower boundaries of the operating frequency range are equal to HFA minus 20 dB to obtain the operating frequency range of the sound package 200. For example, Figure 5In the frequency response of the sound package 200 shown, the upper and lower limits of the operating frequency range of the sound package 200 may be 4250 Hz and 200 Hz respectively. Therefore, the operating frequency range of the sound package 200 may cover the frequency range from 200 Hz to 4000 Hz, so that the sound package 200 is suitable for hearing aids and complies with the ANSI S3.22 standard.

[0107] Therefore, based on the design of the cover structure 100, some sound emitting elements 220 that do not meet the standards of a hearing aid may be used in a hearing aid.

[0108] The present invention also provides Figure 4 The manufacturing method of the sound package 200 is shown. In the manufacturing method, the sound element 220 is formed and disposed on the substrate 210. For example, the sound element 220 can be formed by at least one semiconductor process. Then, a covering structure 100 is formed to cover the sound element 220 to form the sound package 200.

[0109] In summary, the covering structure of the present invention can affect the acoustic waves passing through the acoustic path of the covering structure so that the acoustic waves meet the requirements of the sound generating device.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A covering structure, characterized in that: Arranged in a sound-emitting package, the covering structure comprises: a tubular structure having a first sound opening and a second sound opening, wherein a tubular cavity connected between the first sound opening and the second sound opening exists within the tubular structure; a first cavity, wherein a first cavity exists in the first cavity, and the first cavity is connected to the tubular cavity of the tubular structure; and a first connection structure connected between the tubular structure and the first cavity, wherein the first connection structure is between the first sound opening and the second sound opening, and the first cavity of the first cavity is connected to the tubular cavity of the tubular structure through the first connection structure; Wherein an acoustic path of the cover structure is formed between the first sound opening and the second sound opening.

2. The covering structure according to claim 1, characterized in that: The covering structure further comprises: a second cavity, wherein a second cavity exists in the second cavity, and the second cavity is connected to the first cavity of the first cavity; and A second connection structure is connected between the first cavity and the second cavity, wherein the second cavity of the second cavity is connected to the first cavity of the first cavity through the second connection structure.

3. The covering structure according to claim 1, characterized in that: The covering structure further comprises: a third cavity, wherein a third cavity exists in the third cavity, and the third cavity is connected to the tubular cavity of the tubular structure; and A third connecting structure is connected between the tubular structure and the third cavity, wherein the third connecting structure is between the first sound opening and the second sound opening, and the third cavity of the third cavity is connected to the tubular cavity of the tubular structure through the third connecting structure.

4. The covering structure according to claim 1, characterized in that: The covering structure further includes a block structure, wherein the tubular structure and the first cavity belong to the block structure, and the tubular structure passes through the block structure.

5. The covering structure according to claim 4, characterized in that The first sound opening belongs to a first surface of the block-shaped structure, and a ratio of an area of ​​the first sound opening to an area of ​​the first surface is less than or equal to 0.

2.

6. The covering structure according to claim 1, characterized in that: The covering structure is used to cover a sound element of the sound-generating package, so that a frequency response of the sound-generating package has three peaks in a frequency range of 200 Hz to 4000 Hz.

7. The covering structure according to claim 1, characterized in that: A maximum transmission loss caused by the covering structure to an acoustic wave passing through the acoustic path occurs in a frequency range of 2000 Hz to 4000 Hz.

8. The covering structure according to claim 1, characterized in that The covering structure further includes a supporting structure surrounding the first sound opening.

9. A sound-generating package, characterized in that: include: A sound generating element for generating an acoustic wave; as well as A covering structure, covering the sound-emitting element, the covering structure comprising: a tubular structure having a first sound opening and a second sound opening, wherein a tubular cavity connected between the first sound opening and the second sound opening exists within the tubular structure; a first cavity, wherein a first cavity exists in the first cavity, and the first cavity is connected to the tubular cavity of the tubular structure; and a first connection structure connected between the tubular structure and the first cavity, wherein the first connection structure is between the first sound opening and the second sound opening, and the first cavity of the first cavity is connected to the tubular cavity of the tubular structure through the first connection structure; An acoustic path of the cover structure is formed between the first sound opening and the second sound opening, and the acoustic wave propagates through the acoustic path.

10. The sound-emitting package according to claim 9, characterized in that: The covering structure further comprises: a second cavity, wherein a second cavity exists in the second cavity, and the second cavity is connected to the first cavity of the first cavity; and A second connection structure is connected between the first cavity and the second cavity, wherein the second cavity of the second cavity is connected to the first cavity of the first cavity through the second connection structure.

11. The sound-emitting package according to claim 9, characterized in that: The covering structure further comprises: a third cavity, wherein a third cavity exists in the third cavity, and the third cavity is connected to the tubular cavity of the tubular structure; and A third connecting structure is connected between the tubular structure and the third cavity, wherein the third connecting structure is between the first sound opening and the second sound opening, and the third cavity of the third cavity is connected to the tubular cavity of the tubular structure through the third connecting structure.

12. The sound-emitting package according to claim 9, characterized in that: A frequency response of the sound-emitting package has a first peak, and a first frequency of the first peak is in a range of 1050 Hz to 1250 Hz.

13. The sound-emitting package according to claim 9, characterized in that: A frequency response of the sound-emitting package has a second peak, and a second frequency of the second peak is in the range of 2230 Hz to 2630 Hz.

14. The sound-emitting package according to claim 9, characterized in that: A frequency response of the sound-emitting package has a third peak, and a third frequency of the third peak is in the range of 3300 Hz to 3700 Hz.

15. The sound-emitting package according to claim 9, characterized in that: A first resonance frequency of the sound-generating element is greater than or equal to 10 kHz.

16. The sound-emitting package according to claim 9, characterized in that: The sound-generating element includes a diaphragm and an actuator, and the actuator is used to actuate the diaphragm to generate the acoustic wave.

17. The sound-emitting package according to claim 9, characterized in that: The sound-generating element is a micro-electromechanical system speaker.

18. The sound-emitting package according to claim 9, characterized in that: A frequency response of the sound-emitting package complies with ANSI S3.22 standard.

19. The sound-emitting package according to claim 9, characterized in that: The sound-emitting package is used in a hearing aid.

20. A method for manufacturing a sound-emitting package, characterized in that: include: forming a sound-generating element, wherein the sound-generating element is used to generate an acoustic wave; as well as A covering structure is formed to cover the sound-emitting element, wherein the covering structure comprises: a tubular structure having a first sound opening and a second sound opening, wherein a tubular cavity connected between the first sound opening and the second sound opening exists within the tubular structure; a first cavity, wherein a first cavity exists in the first cavity, and the first cavity is connected to the tubular cavity of the tubular structure; and a first connection structure connected between the tubular structure and the first cavity, wherein the first connection structure is between the first sound opening and the second sound opening, and the first cavity of the first cavity is connected to the tubular cavity of the tubular structure through the first connection structure; An acoustic path of the cover structure is formed between the first sound opening and the second sound opening, and the acoustic wave propagates through the acoustic path.

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