A sound privacy protection device

Abstract

The present invention discloses a sound privacy protection device, comprising a wearing structure for being worn on the ear, and a mounting structure connected to the wearing structure; the mounting structure is provided with at least one sound-emitting unit; the mounting structure is provided with at least one front sound-emitting hole for guiding the sound-emitting unit; the sound-emitting end of the front sound-emitting hole is arranged near the EEP position. The front sound-emitting hole and the anti-phase sound hole are both provided on the mounting structure, and the wearing structure enables the sound-emitting hole and the anti-phase sound hole to be located at a predetermined point. This allows the sound waves of the anti-phase sound hole and the front sound hole to cancel each other out in the far sound field, achieving the purpose of sound cancellation, preventing the outside world from hearing the sound emitted by the device, and thus protecting privacy.

Description

Technical Field

[0001] The present invention relates to the technical field of earphones, and more particularly to a sound privacy protection device. Background Art

[0002] In existing audio product designs, such as glasses and earphones, the sound outlet is located far from the ear canal entrance point (EEP). When the audio device plays at a high volume, a large amount of sound leaks into the outside world, causing external interference or compromising the user's privacy. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a sound privacy protection device.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A sound privacy protection device includes a wearing structure for being worn on the ear and a mounting structure connected to the wearing structure; the mounting structure is provided with at least one sound-emitting unit; the mounting structure is provided with at least one front sound outlet for guiding the sound-emitting unit; the sound outlet end of the front sound outlet is arranged close to the EEP position.

[0006] A further technical solution is as follows: the mounting structure is provided with at least one anti-phase sound hole; the anti-phase sound hole is arranged close to the ERP position.

[0007] A further technical solution is: the front sound hole is connected to the sound output end of the sound unit, and the reverse sound hole is connected to the rear end of the sound unit; the front sound hole and the reverse sound hole are located in the mounting structure and are sealed and separated from each other.

[0008] Its further technical solution is: the EEP is the origin of the spatial coordinate, the EEP facing the outside of the ear is the positive half-axis of the X-axis, the EEP facing the front side of the ear is the positive half-axis of the Y-axis, and the EEP facing the upper side of the ear is the positive half-axis of the Z-axis; the coordinates of the sound outlet end of the front sound hole are between (0mm, -12.2mm, -5.2mm) and (15.3mm, 3.2mm, 13.3mm); the coordinates of the sound outlet end of the anti-phase sound hole are between (5mm, -22mm, -3.2mm) and (27.3mm, 15mm, 18mm).

[0009] Its further technical solution is: the ERP is the origin of the spatial coordinate, the ERP facing the outside of the ear is the positive half-axis of the X-axis, the ERP facing the front side of the ear is the positive half-axis of the Y-axis, and the ERP facing the upper side of the ear is the positive half-axis of the Z-axis; the sound outlet end of the front sound hole is located between (0mm, -9.2mm, -18.2mm) and (7.3mm, 10.4mm, 8.2mm); the coordinates of the sound outlet end of the anti-phase sound hole are located between (5mm, -15.2mm, -3.2mm) and (20.3mm, 12mm, 13mm).

[0010] A further technical solution is: the cross-sectional area of the front sound hole is 10% to 35% of the area of the vibration membrane of the sound unit.

[0011] A further technical solution is as follows: the cross-sectional area of the anti-phase sound hole is 10% to 30% of the area of the vibration membrane of the sound-emitting unit.

[0012] A further technical solution is that the number of the front sound holes is equal to the number of the anti-phase sound holes.

[0013] A further technical solution is that the shape of the front sound hole or the reverse sound hole is one of circular, square, elliptical, and racetrack shapes, or a combination of two or more.

[0014] A further technical solution is: the front sound hole is arranged on the side of the mounting structure facing the ear canal; the anti-phase sound hole is arranged on the side of the mounting structure facing away from the ear canal.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: the front sound hole and the anti-phase sound hole of the present invention are both arranged on the mounting structure, and the sound hole and the anti-phase sound hole are located at a set point through the wearing structure, so that the sound waves of the anti-phase sound hole and the front sound hole cancel each other out in the far sound field, achieving the purpose of sound elimination, preventing the outside world from hearing the sound emitted by the device, and protecting privacy.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of wearing a sound privacy protection device according to the present invention;

[0018] Figure 2 for Figure 1 Cross-sectional view at AA;

[0019] Figure 3A schematic diagram of wearing a sound privacy protection device according to the present invention;

[0020] Figure 4 for Figure 3 Cross-sectional view at BB. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0025] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0028] Figures 1 to 4 It is the accompanying drawing of the present invention.

[0029] This implementation provides a sound privacy protection device, see Figures 1 to 4 The device comprises a wearing structure 10 for wearing on the ear and a mounting structure 20 connected to the wearing structure 10. The mounting structure 20 is provided with at least one sound-emitting unit 11. The mounting structure is provided with at least one front sound outlet 12 for guiding the sound-emitting unit 11. The sound outlet end of the front sound outlet 12 is located near the EEP position, which can effectively transmit the sound of the sound-emitting unit 11 to the ear canal. The front sound outlet 12 is located at the entrance of the ear canal in a suspended manner.

[0030] The mounting structure 20 is provided with at least one anti-phase sound hole 13. This hole 13 is located near the ERP. The front sound hole 12 and the sound outlet of the anti-phase sound hole 13 are spaced apart at a predetermined distance, allowing the outgoing audio to offset each other and prevent sound leakage.

[0031] In the figure, reference numeral 14 denotes the ear canal, and reference numeral 15 denotes the human ear.

[0032] Among them, EEP (Ear canal Entrance Point) is the entrance of the ear canal, and ERP (Ear Reference Point) is the ear reference point, which are the contents of the standard ITU-T P.57 promulgated by the International Telecommunication Union Telecommunication Standardization Bureau (ITU).

[0033] The front sound outlet 12 of the sound unit 11 is close to the ear canal entrance point (EEP), but does not touch it. Spatially, the front sound outlet 12 and the anti-phase sound outlet 13 are close to the ear canal entrance point (EEP) and the ear reference point (ERP), respectively. This spatial distance between the front sound outlet 12 and the anti-phase sound outlet 13 maximizes far-field sound cancellation.

[0034] The sound waves of the anti-phase sound hole 13 are opposite in phase to the sound waves of the front sound hole 12, but have the same amplitude. In the far sound field, the sound waves of the two sound holes cancel each other out, thereby eliminating the sound and preventing the outside world from hearing the sound emitted by the device, thereby protecting privacy.

[0035] The front sound hole 12 is connected to the sound output end of the sound unit 11, and the reverse sound hole 13 is connected to the rear end of the sound unit 11. The front sound hole 12 and the reverse sound hole 13 are located in the mounting structure 20 and are sealed and separated from each other to prevent the front sound hole 12 and the reverse sound hole 13 from communicating with each other in the device, which would affect the sound output effect of the front sound hole 12.

[0036] To better represent the spatial positions of the front sound hole 12 and the anti-phase sound hole 13, EEP is the origin of the spatial coordinate system. The X-axis positive semi-axis is the direction of EEP toward the outside of the ear, the Y-axis positive semi-axis is the direction of EEP toward the front of the ear, and the Z-axis positive semi-axis is the direction of EEP toward the top of the ear. The coordinates of the sound outlet of the front sound hole 12 are between (0mm, -12.2mm, -5.2mm) and (15.3mm, 3.2mm, 13.3mm). This means that the center point of the sound outlet of the front sound hole 12 is located at any point between (0mm, -12.2mm, -5.2mm) and (15.3mm, 3.2mm, 13.3mm). The coordinates of the sound outlet end of the anti-phase sound hole 13 are between (5mm, -22mm, -3.2mm) and (27.3mm, 15mm, 18mm). Similarly, the center point of the sound outlet end of the anti-phase sound hole 13 is located at any point between 5mm, -22mm, -3.2mm) and (27.3mm, 15mm, 18mm).

[0037] In another embodiment, ERP is the origin of the spatial coordinate system, the ERP toward the outside of the ear is the positive X-axis, the ERP toward the front of the ear is the positive Y-axis, and the ERP toward the top of the ear is the positive Z-axis. The sound outlet of the front sound hole 12 is located between (0mm, -9.2mm, -18.2mm) and (7.3mm, 10.4mm, 8.2mm), which can be understood as the center point of the sound outlet of the front sound hole 12 being located at any point between (0mm, -9.2mm, -18.2mm) and (7.3mm, 10.4mm, 8.2mm). The coordinates of the sound outlet end of the anti-phase sound hole 13 are between (5mm, -15.2mm, -3.2mm) and (20.3mm, 12mm, 13mm). Similarly, the center point of the sound outlet end of the anti-phase sound hole 13 is located at any point between (5mm, -15.2mm, -3.2mm) and (20.3mm, 12mm, 13mm).

[0038] Preferably, the cross-sectional area of the front sound hole 12 is 10% to 35% of the area of the vibration membrane of the sound unit 11 , so that the sound unit 11 can converge and improve the sound guiding effect of the front sound hole 12 .

[0039] The cross-sectional area of the anti-phase sound hole 13 is 10% to 30% of the area of the diaphragm of the sound unit 11, allowing the energy of the diaphragm of the sound unit 11 to be transmitted through the front sound hole 12. The anti-phase sound hole 13 is connected to the rear end of the sound unit 11, allowing the rear end of the sound unit 11 to exchange air when the sound unit 11 vibrates.

[0040] Preferably, the number of the front sound holes 12 is equal to the number of the reverse-phase sound holes 13 , and the center points of the sound outlet ends of the front sound holes 12 and the reverse-phase sound holes 13 both fall within the coordinate points of the above-mentioned coordinate system.

[0041] The shape of the front sound hole 12 or the reverse sound hole 13 is one of a circle, a square, an ellipse, and a racetrack, or a combination of two or more thereof.

[0042] The front sound outlet 12 is provided on the side of the mounting structure 20 facing the ear canal, and the reverse sound outlet 13 is provided on the side of the mounting structure 20 facing away from the ear canal.

[0043] The wearing structure 10 is a curved structure that fits over the ear to secure the entire earphone. Preferably, the wearing structure 10 is made of a memory material to facilitate matching the contours of the ear. In other embodiments, the wearing structure 10 can also be secured to the ear in other ways, not limited to the aforementioned hooking method. The function of the wearing structure 10 is simply to secure the earphone and ensure that the front sound hole 12 and the reverse sound hole 13 on the mounting structure 20 fall on the aforementioned points.

[0044] Compared with the prior art, the front sound hole 12 and the anti-phase sound hole 13 of the present invention are both arranged on the mounting structure, and the wearing structure 10 makes the sound hole 12 and the anti-phase sound hole 13 located at a set point, so that the sound waves of the anti-phase sound hole 13 and the front sound hole 12 cancel each other out in the far sound field, achieving the purpose of sound elimination, preventing the outside world from hearing the sound emitted by the device, and protecting privacy.

[0045] The above examples are merely provided to further illustrate the technical content of the present invention for easier understanding by the reader, but do not limit the embodiments of the present invention to these examples. Any extension or re-creation of the technology based on the present invention is protected by the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. A sound privacy protection device, characterized in that: The device comprises a wearing structure for wearing on the ear and a mounting structure connected to the wearing structure. The wearing structure is a curved structure for hanging on the ear to fix the entire sound privacy protection device. The wearing structure is made of a memory material. The mounting structure is provided with at least one sound-emitting unit. The mounting structure is provided with at least one front sound-emitting hole and at least one reverse sound-emitting hole for guiding the sound-emitting unit. The sound-emitting end of the front sound-emitting hole is arranged near the EEP position, and the reverse sound-emitting hole is arranged near the ERP position. The EEP is the origin of the spatial coordinate system, the outer side of the EEP toward the ear is the positive half axis of the X axis, the front side of the EEP toward the ear is the positive half axis of the Y axis, and the upper side of the EEP toward the ear is the positive half axis of the Z axis; the coordinates of the sound outlet end of the front sound hole are between (0mm, -12.2mm, -5.2mm) and (15.3mm, 3.2mm, 13.3mm); the coordinates of the sound outlet end of the anti-phase sound hole are between (5mm, -22mm, -3.2mm) and (27.3mm, 15mm, 18mm); or, The ERP is the origin of the spatial coordinate system, the ERP toward the outside of the ear is the positive half-axis of the X axis, the ERP toward the front of the ear is the positive half-axis of the Y axis, and the ERP toward the top of the ear is the positive half-axis of the Z axis; the sound outlet of the front sound hole is located between (0mm, -9.2mm, -18.2mm) and (7.3mm, 10.4mm, 8.2mm); the coordinates of the sound outlet of the reverse sound hole are located between (5mm, -15.2mm, -3.2mm) and (20.3mm, 12mm, 13mm); The cross-sectional area of the front sound outlet is 10% to 35% of the area of the vibration membrane of the sound unit; The cross-sectional area of the anti-phase sound hole is 10% to 30% of the area of the vibration membrane of the sound unit.

2. A sound privacy protection device according to claim 1, characterized in that: The front sound outlet is connected to the sound outlet end of the sound unit, and the reverse sound outlet is connected to the rear end of the sound unit; the front sound outlet and the reverse sound outlet are located in the mounting structure and are sealed and separated from each other.

3. The sound privacy protection device according to claim 1, characterized in that: The number of the front sound holes is equal to the number of the anti-phase sound holes.

4. The sound privacy protection device according to claim 1, characterized in that: The shape of the front sound hole or the reverse sound hole is one of circular, square, elliptical, and racetrack shapes, or a combination of two or more thereof.

5. The sound privacy protection device according to claim 1, characterized in that: The front sound hole is arranged on the side of the mounting structure facing the ear canal; the reverse sound hole is arranged on the side of the mounting structure facing away from the ear canal.

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