An underwater sound acquisition device capable of avoiding voice distortion

Abstract

The utility model discloses an underwater sound acquisition device capable of avoiding voice distortion, which comprises a shell, a sound wave filtering assembly, a sound wave receiving assembly and a signal transmission part, the shell has a waterproof sealed cavity inside, the sound wave filtering assembly is installed in the waterproof sealed cavity, is used for filtering bass parts formed due to resonance of the sealed space, the sound wave receiving assembly is installed in the waterproof sealed cavity, is used for receiving sound waves filtered through the sound wave filtering assembly, and the signal transmission part is used for realizing signal transmission between the sound wave receiving assembly and external equipment. The underwater sound acquisition device can be installed on a waterproof breathing mask for use to collect human voices of underwater personnel. The sound wave filtering assembly arranged can filter out bass parts formed due to resonance of the sealed space, can avoid voice distortion, the sound wave receiving assembly receives filtered sound waves, and then transmits the sound waves to external equipment through the signal transmission part, so that the sound wave receiving party can receive clear voice information and correctly identify voice content.

Description

Technical Field

[0001] This utility model relates to the field of underwater communication technology, specifically to an underwater sound acquisition device that can avoid voice distortion. Background Technology

[0002] In existing technologies, underwater voice recording involves installing a microphone inside a waterproof breathing mask worn by underwater personnel. The voice emitted by the underwater personnel is directly captured by the microphone and converted into a sonar signal for transmission underwater. However, the waterproof breathing mask creates a closed space, causing distortion in the voice captured by the microphone. Consequently, the receiver cannot receive clear voice information and cannot correctly identify the voice content. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an underwater sound acquisition device that can avoid voice distortion, so that the sound wave receiver can receive clear voice information and correctly identify the voice content.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: An underwater sound acquisition device that can avoid voice distortion, comprising:

[0005] An outer casing, wherein the outer casing has a waterproof and sealed cavity;

[0006] A sound wave filtering assembly is installed inside the waterproof and sealed cavity to filter the low-frequency components generated by resonance in the sealed space.

[0007] A sound wave receiving component, wherein the sound wave receiving component is installed within the waterproof and sealed cavity, for receiving sound waves filtered by the sound wave filtering component; and

[0008] The signal transmission unit is used to realize signal transmission between the sound wave receiving component and external devices.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This underwater sound acquisition device can be installed on a waterproof breathing mask to collect the voice of underwater personnel. The sound wave filtering component can filter out the low-frequency part caused by resonance in a confined space, thus avoiding voice distortion. The sound wave receiving component receives the filtered sound waves and then transmits them to external devices through the signal transmission unit, which makes it easier for the sound wave receiver to receive clear voice information and correctly identify the voice content.

[0010] The aforementioned underwater sound acquisition device that can avoid voice distortion includes an acoustic filtering component comprising an acoustic filtering membrane sealed to the first end of the waterproof sealed cavity, and an acoustic receiving component comprising a microphone connected to the second end of the waterproof sealed cavity, and the microphone being electrically connected to the signal transmission unit.

[0011] The aforementioned underwater sound acquisition device that can avoid voice distortion has a first protrusion at the second end of the waterproof sealed cavity, which protrudes towards the first end. There is a first annular space between the outer periphery of the first protrusion and the inner periphery of the waterproof sealed cavity. The first protrusion has a groove, and the microphone is positioned and connected in the groove. There is a second annular space between the microphone and the inner periphery of the groove.

[0012] The aforementioned underwater sound acquisition device that can avoid voice distortion has a positioning block in the groove for positioning and connecting the microphone. The bottom wall of the groove has a through hole that passes through the outer shell. The signal transmission part is a signal transmission line that is electrically connected to the microphone and passes through the through hole to the outside of the outer shell.

[0013] In the aforementioned underwater sound acquisition device that can avoid voice distortion, the positioning block and the bottom wall of the groove are filled with potting compound, and the outer periphery of the signal transmission line is sealed to the inner periphery of the wire hole.

[0014] The aforementioned underwater sound acquisition device that can avoid voice distortion has a second protrusion protruding outward along the circumference of the wire hole on the outer side of the housing, and the wire hole passes through the second protrusion.

[0015] In the aforementioned underwater sound acquisition device that can avoid voice distortion, a sleeve is sealed inside the wire hole, and the signal transmission line is sealed and inserted into the sleeve.

[0016] The aforementioned underwater sound acquisition device that can avoid voice distortion has a signal transmission line with a looped portion located between the positioning block and the bottom wall of the groove.

[0017] The underwater sound acquisition device described above, which can avoid voice distortion, uses a coaxial cable as its signal transmission line.

[0018] The underwater sound acquisition device described above, which can avoid voice distortion, has an acoustic filter membrane with a thickness of 0.2mm to 1mm.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the underwater sound acquisition device according to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the underwater sound acquisition device according to an embodiment of the present invention.

[0022] Explanation of icon numbers:

[0023] 100 Outer shell, 110 Waterproof sealed cavity, 111 First annular space, 120 First protrusion, 121 Groove, 122 Second annular space, 130 Positioning block, 140 Wire hole, 150 Potting compound, 160 Second protrusion, 170 Threaded hole;

[0024] 200 acoustic filter components, 210 acoustic filter membrane;

[0025] 300 acoustic wave receiver, 310 microphone;

[0026] 400 Signal transmission section, 410 Coiling section;

[0027] 500 sleeves. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below, with reference to Figure 1 and Figure 2 This utility model provides an underwater sound acquisition device that can avoid voice distortion, including a housing 100, a sound wave filtering component 200, a sound wave receiving component 300, and a signal transmission unit 400. The housing 100 has a waterproof and sealed cavity 110. The sound wave filtering component 200 is installed in the waterproof and sealed cavity 110 to filter the low-frequency part formed by the resonance of the sealed space. The sound wave receiving component 300 is installed in the waterproof and sealed cavity 110 to receive the sound waves filtered by the sound wave filtering component 200. The signal transmission unit 400 is used to realize the signal transmission between the sound wave receiving component 300 and external devices.

[0029] This underwater sound acquisition device can be installed on a waterproof breathing mask to collect the voices of underwater personnel. The sound wave filtering component 200 can filter out the low-frequency part caused by resonance in a confined space, thus avoiding voice distortion. The sound wave receiving component 300 receives the filtered sound waves and then transmits them to external devices through the signal transmission unit 400, which makes it easy for the sound wave receiver to receive clear voice information and correctly identify the voice content.

[0030] Furthermore, referring to Figure 2The outer casing 100 has a threaded hole 170 at its first end, which can be screwed onto a fixing seat on the waterproof breathing mask to form a waterproof sealed cavity 110. Further, the acoustic filtering assembly 200 includes an acoustic filter membrane 210, which is sealed to the first end of the waterproof sealed cavity 110 and located between the sound source and the acoustic receiving assembly 300. The acoustic receiving assembly 300 includes a microphone 310, which is connected to the second end of the waterproof sealed cavity 110 and has a certain distance between it and the acoustic filter membrane 210. The microphone 310 is electrically connected to the signal transmission unit 400.

[0031] In some embodiments, the acoustic filter membrane 210 is fixed inside the housing 100 by adhesive, which not only provides waterproofing to prevent the acoustic receiving component 300 inside the waterproof sealed cavity 110 from short-circuiting and failing when exposed to water, but also filters low echoes caused by resonance in the sealed space, allowing sound to propagate with high fidelity. Further, in some embodiments, the acoustic filter membrane 210 is a PVC film with a thickness between 0.2mm and 1mm, preferably between 0.3mm and 0.8mm, which can eliminate excess bass and resonance sounds, thereby preventing sound distortion.

[0032] It should be noted that the signal transmission unit 400 in this invention can be used for both wired and wireless transmission. For example, when used for wired transmission, the signal transmission unit 400 can be a signal transmission line, one end of which is electrically connected to the microphone 310, and the other end extends out from the housing 100 and can be electrically connected to an external device. The external device can be a signal conversion unit, such as a Bluetooth transceiver, or a mobile smart terminal, such as a mobile phone. As another example, when used for wireless transmission, the signal transmission unit 400 can be a unit with signal receiving, conversion, and transmission functions disposed inside the housing 100.

[0033] It is understandable that the wired and wireless transmission capabilities of the signal transmission unit 400 refer to specific modules within the signal transmission unit 400. For example, consider a scenario where a signal transmission line is used, with one end electrically connected to the microphone 310 and the other end electrically connected to a Bluetooth transceiver:

[0034] When the Bluetooth transceiver is external, the signal transmission unit 400 only includes the signal transmission line and does not include the Bluetooth transceiver. In this case, the signal transmission unit 400 can be considered as being used for wired transmission.

[0035] When the Bluetooth transceiver is built-in, the signal transmission unit 400 includes a signal transmission line and a Bluetooth transceiver. In this case, the signal transmission unit 400 can be considered as being used for wireless transmission.

[0036] Furthermore, when the signal transmission unit 400 is a signal transmission line, the signal transmission line can be a coaxial cable, with one end electrically connected to the microphone 310 and the other end extending outside the housing 100 and electrically connected to the Bluetooth transmitter. The coaxial cable enables long-distance signal transmission, providing ample operational space for waterproofing and allowing the Bluetooth transmitter to be closer to the mobile smart terminal, minimizing signal attenuation in water. Specifically, the coaxial cable uses waterproof, moisture-proof, and corrosion-resistant materials, has a length of at least 20cm, and an insulation thickness of at least 0.5mm.

[0037] Furthermore, continue to refer to Figure 2 In some embodiments, the second end of the waterproof sealed cavity 110 is provided with a first protrusion 120 protruding towards the first end. A first annular space 111 exists between the outer periphery of the first protrusion 120 and the inner periphery of the waterproof sealed cavity 110. A groove 121 is formed in the first protrusion 120, and a microphone 310 is positioned and connected within the groove 121. A second annular space 122 exists between the microphone 310 and the inner periphery of the groove 121. After sound propagates through the acoustic filter membrane 210 into the waterproof sealed cavity 110, the second annular space 122 can make the sound more concentrated, further preventing echoes and ensuring that the microphone 310 can receive clear voice signals. Specifically, the first protrusion 120 is a cylindrical protrusion, and the groove 121 is a cylindrical groove.

[0038] Furthermore, a positioning block 130 is provided within the groove 121, which is used to position and connect the microphone 310. A through-hole 140, penetrating the outer casing 100, is provided on the bottom wall of the groove 121, allowing the coaxial cable to pass through the casing 100. The two ports of the microphone 310 are soldered to the inner and outer conductors of the coaxial cable, respectively, to achieve electrical connection with the coaxial cable. The coaxial cable has a certain rigidity, effectively fixing the microphone 310 within the groove 121 without completely fixing it, thus providing cushioning, vibration reduction, and energy absorption to prevent resonance distortion during sound acquisition. Furthermore, potting compound 150 is filled between the positioning block 130 and the bottom wall of the groove 121, and the outer periphery of the signal transmission line is sealed to the inner periphery of the through-hole 140. The potting compound 150 not only effectively fixes the coaxial cable and microphone 310 but also forms a reliable waterproof wall, improving the waterproof effect within the waterproof sealed cavity 110. The design of the positioning block 130 can pre-fix the coaxial cable and microphone 310 during the potting process, which helps to limit the microphone 310 to the middle position of the groove 121. While preventing resonance distortion, it can also avoid the microphone 310 from contacting the side wall of the groove 121 and causing sound wave vibration interference.

[0039] In some embodiments, the inner diameter of the through hole 140 is slightly smaller than the outer diameter of the insulation layer of the coaxial cable. The insulation layer has a certain degree of flexibility, allowing the insulation layer to tightly fit the inner wall of the through hole 140 after the coaxial cable passes through it, thus sealing the through hole 140. In some embodiments, a sleeve 500 is sealed inside the through hole 140, and the signal transmission line is sealed and inserted into the sleeve 500. The sleeve 500 facilitates the potting of the potting compound 150 and increases the connection toughness between the coaxial cable and the outer shell 100. When the coaxial cable is stretched, the sleeve 500 remains sealed inside the through hole 140, preventing water ingress. Furthermore, the signal transmission line has a coiled portion 410 located between the positioning block 130 and the bottom wall of the groove 121. The coiled portion 410 provides significant cushioning against stretching, further increasing the tensile strength of the coaxial cable. While preventing wire breakage, it also greatly minimizes the impact of the external environment on the internal microphone 310, thereby further preventing sound resonance distortion. Furthermore, the outer casing 100 has a second protrusion 160 protruding outwards along the circumference of the wire hole 140. The second protrusion 160 and the first protrusion 120 are respectively disposed opposite to each other on the outer and inner sides of the casing 100, and the wire hole 140 passes through the second protrusion 160. The second protrusion 160 can appropriately extend the length of the wire hole 140, thereby increasing the mating length between the wire hole 140 and the sleeve 500 or the coaxial cable, thus further increasing the connection strength and tensile strength of the coaxial cable.

[0040] It should be noted that in the description of this utility model, any descriptions of orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of this utility model.

[0041] In the description of this utility model, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is mentioned, it is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0043] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An underwater sound acquisition device capable of avoiding voice distortion, characterized in that, include: An outer casing, wherein the outer casing has a waterproof and sealed cavity; A sound wave filtering assembly is installed inside the waterproof and sealed cavity to filter the low-frequency components generated by resonance in the sealed space. A sound wave receiving component is installed inside the waterproof and sealed cavity and is used to receive sound waves filtered by the sound wave filtering component. as well as The signal transmission unit is used to realize signal transmission between the sound wave receiving component and external devices.

2. The underwater sound acquisition device capable of avoiding voice distortion according to claim 1, characterized in that, The acoustic filtering assembly includes an acoustic filtering membrane, which is sealed to the first end of the waterproof sealed cavity. The acoustic receiving assembly includes a microphone, which is connected to the second end of the waterproof sealed cavity and electrically connected to the signal transmission unit.

3. The underwater sound acquisition device capable of avoiding voice distortion according to claim 2, characterized in that, The second end of the waterproof sealed cavity is provided with a first protrusion that protrudes toward the first end. There is a first annular space between the outer periphery of the first protrusion and the inner periphery of the waterproof sealed cavity. The first protrusion is provided with a groove. The microphone is positioned and connected in the groove. There is a second annular space between the microphone and the inner periphery of the groove.

4. The underwater sound acquisition device capable of avoiding voice distortion according to claim 3, characterized in that, The groove is provided with a positioning block for positioning and connecting the microphone. The bottom wall of the groove is provided with a through hole that passes through the outer shell. The signal transmission part is a signal transmission line, which is electrically connected to the microphone and passes through the through hole to the outside of the outer shell.

5. The underwater sound acquisition device capable of avoiding voice distortion according to claim 4, characterized in that, The positioning block and the bottom wall of the groove are filled with potting compound, and the outer periphery of the signal transmission line is sealed to the inner periphery of the wire hole.

6. The underwater sound acquisition device capable of avoiding voice distortion according to claim 4, characterized in that, The outer surface of the housing has a second protrusion that protrudes outward along the circumference of the thread hole, and the thread hole passes through the second protrusion.

7. The underwater sound acquisition device capable of avoiding voice distortion according to claim 4, characterized in that, A sleeve is sealed inside the wire hole, and the signal transmission line is sealed and inserted into the sleeve.

8. The underwater sound acquisition device capable of avoiding voice distortion according to claim 4, characterized in that, The signal transmission line has a loop portion, which is located between the positioning block and the bottom wall of the groove.

9. The underwater sound acquisition device capable of avoiding voice distortion according to any one of claims 4-8, characterized in that, The signal transmission line is a coaxial cable.

10. The underwater sound acquisition device capable of avoiding voice distortion according to any one of claims 2-8, characterized in that, The thickness of the acoustic filter membrane is 0.2mm to 1mm.

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