Sound amplification device and sound amplification system

Abstract

The application discloses an audio amplification device and an audio amplification system, and belongs to the field of audio amplification devices. The audio amplification device comprises a seat body, a microphone rod, a sound collection assembly, noise reduction cotton, a loudspeaker and a noise reduction microphone. The seat body is provided with a mounting cavity, a sound outlet hole and a sound pickup hole. The mounting cavity is in communication with the outside of the seat body through the sound outlet hole and the sound pickup hole. The microphone rod is provided with a connecting end connected to the seat body and a supporting end extending away from the seat body. The sound collection assembly is mounted on the supporting end of the microphone rod. The noise reduction cotton is sleeved on the sound collection assembly. The loudspeaker is mounted in the mounting cavity and located at the sound outlet hole. The noise reduction microphone is mounted in the mounting cavity and located at the sound pickup hole. The loudspeaker and the noise reduction microphone are electrically connected to the sound collection assembly. The audio amplification device can avoid the generation of howling and improve the experience of users.

Description

Technical Field

[0001] This application relates to the field of audio amplification devices, and more particularly to a sound amplification device and a sound amplification system. Background Technology

[0002] In various meetings, lectures, training sessions, and other settings, amplification equipment serves as a crucial tool for ensuring the effective transmission of information. However, in practice, speakers often have to raise their voices to ensure that attendees located further away in the meeting room can hear them clearly.

[0003] However, when a speaker raises their voice, the sound can easily create a feedback loop between the speaker and microphone of the amplification equipment, resulting in howling. Howling is a sharp, piercing noise that can instantly shatter the quiet atmosphere of a meeting, seriously affecting the normal progress of the meeting and greatly reducing the meeting experience for all participants. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a loudspeaker and loudspeaker system that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution: On the one hand, a loudspeaker is provided, comprising: The base has a mounting cavity, a sound outlet, and a sound pickup hole; the mounting cavity communicates with the outside of the base through the sound outlet and the sound pickup hole; The straw has a connecting end connected to the base and a supporting end extending in a direction away from the base; A sound acquisition component is installed at the support end of the wheat pole; Noise-reducing cotton is fitted onto the sound acquisition component; A loudspeaker is installed inside the mounting cavity and located at the sound outlet. as well as A noise-canceling microphone is installed inside the mounting cavity and located at the pickup hole; The speaker and the noise-canceling microphone are both electrically connected to the sound acquisition component.

[0006] Preferably, the amplification device further includes a first bracket, a second bracket, a first vibration damper, and a second vibration damper; the first bracket and the second bracket are spaced apart in the mounting cavity, one side of the speaker is mounted to the first bracket through the first vibration damper, and the other side of the speaker is mounted to the second bracket through the second vibration damper, effectively reducing the vibration transmission of the speaker and improving the sound pickup effect of the noise-canceling microphone.

[0007] Preferably, the amplification device further includes vibration-damping foam; the speaker has a sound-emitting hole, the vibration-damping foam is annular and has a sound-guiding channel, the vibration-damping foam is sandwiched between the speaker and the inner wall of the mounting cavity, and the sound-emitting hole, the sound-guiding channel, the sound-guiding channel and the sound outlet are connected in sequence to avoid the sound of the speaker from propagating in the mounting cavity and causing vibration and echo problems, which would affect the user's use.

[0008] Preferably, the sound acquisition component includes a microphone body, a first housing, and a second housing; the first housing and the second housing are connected and together fitted onto the support end of the microphone rod, and the first housing and the second housing together enclose a sound receiving cavity, and the microphone body is installed in the sound receiving cavity to realize the conversion of sound signals into electrical signals.

[0009] Preferably, the sound acquisition component further includes a mesh cover; the mesh cover is fitted over the first housing and the second housing, and the noise-reducing cotton is fitted over the mesh cover, which can protect the microphone body, the first housing and the second housing, and can also effectively identify and acquire external sound through the mesh.

[0010] Preferably, the microphone body is an electret directional microphone, which can effectively perform directional sound pickup, reduce the collection of other sounds besides the main direction, and avoid interference from sound sources.

[0011] Preferably, the loudspeaker further includes a base frame and a connector both disposed within the mounting cavity; the base also has a socket, and the mounting cavity communicates with the outside of the base through the socket; The base frame is provided with a slot, the connector is installed in the slot, the connecting end of the microphone rod passes through the socket and is connected to the connector, and the microphone rod is a flexible rod that can produce plastic deformation, so that the sound collection angle can be adjusted.

[0012] Preferably, the base includes a base plate and a housing; the housing is mounted on the base plate and together with the base plate forms a mounting cavity; the sound outlet and the sound pickup hole are both opened in the housing, the speaker is located on the base plate, and the noise-canceling microphone is located in the housing, which facilitates the installation of the noise-canceling microphone and the speaker.

[0013] Preferably, the loudspeaker further includes a control board and a control component with several buttons; the base is provided with key holes, the control board and the control component are both installed in the mounting cavity, the control component is installed on the control board, and the buttons extend through the key holes to the outside of the base; The control component, the sound acquisition component, the speaker, and the noise-canceling microphone are all electrically connected to the control board to control the amplification equipment.

[0014] Preferably, the amplification device further includes a battery holder and a power supply battery; the power supply battery is installed in the mounting cavity through the battery holder, and the sound acquisition component, the speaker, and the noise-canceling microphone are all electrically connected to the power supply battery, which can not only provide power to the amplification device, but also serve as a certain counterweight to reduce the vibration of the amplification device.

[0015] Preferably, the bottom surface of the seat is provided with a silicone pad; there are multiple silicone pads arranged at intervals to achieve vibration reduction.

[0016] Preferably, the base has a first outer side and a second outer side that are opposite to each other; the opening of the pickup hole and the opening of the sound outlet hole are both located on the first outer side, the speaker's sound hole faces the sound outlet hole, the connecting end of the microphone rod is located between the first outer side and the second outer side, and the supporting end of the microphone rod extends along the direction close to the second outer side, which can effectively reduce the interference of the speaker's sound on the sound acquisition component and the propagation of the vibration source.

[0017] Preferably, the noise-canceling microphone is mounted on the inner wall of the mounting cavity with double-sided adhesive and covers the pickup hole, which can ensure the airtightness of the noise-canceling microphone.

[0018] Preferably, the noise-canceling microphone is arranged adjacent to the speaker, which can effectively collect the sound from the speaker and perform algorithmic noise reduction processing.

[0019] On the other hand, a loudspeaker system is provided, including the loudspeaker devices described above; there are multiple loudspeaker devices, and the multiple loudspeaker devices are electrically connected to each other.

[0020] The beneficial effects of this application are as follows: the amplification device of this application can effectively reduce noise by covering the sound acquisition component with noise-reducing cotton. At the same time, this application also includes a noise-reducing microphone, which effectively acquires the sound from the speaker and then performs algorithmic noise reduction processing to avoid feedback and improve the user experience.

[0021] The public address system of this application, by adopting the aforementioned public address equipment, can avoid the generation of feedback noise and ensure the normal conduct of various meetings, lectures, training sessions, etc. Attached Figure Description

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] Figure 1 A schematic diagram of the structure of a loudspeaker from one perspective; Figure 2 A structural schematic diagram of the loudspeaker equipment from another perspective; Figure 3 An exploded view of a loudspeaker. Figure 4 A cross-sectional view of a loudspeaker from one perspective; Figure 5 for Figure 4 A magnified view of point A; Figure 6 A cross-sectional view of the loudspeaker equipment from another perspective; Figure 7 This is a structural diagram of the base plate, speaker, microphone stick, base frame, battery holder, power supply battery, control board, and control components. Figure 8 This is a structural schematic diagram of the loudspeaker, the first bracket, the second bracket, the first damping component, and the second damping component; Figure 9 This is a structural diagram of the microphone pole, sound acquisition component, base frame, control board, and control component.

[0024] Explanation of reference numerals in the attached figures: 11. Base; 12. Microphone stick; 13. Sound acquisition component; 14. Noise-absorbing foam; 15. Speaker; 16. Noise-canceling microphone; 17. First bracket; 18. Second bracket; 19. First vibration damping component; 20. Second vibration damping component; 21. Vibration damping foam; 22. Base frame; 23. Connector; 24. Control board; 25. Control component; 26. Battery holder; 27. Power supply battery; 28. Silicone pad; 111. Mounting cavity; 112. Sound outlet; 113. Sound pickup hole; 114. Raised ring; 115. Base plate; 116. Outer shell; 117. Key hole; 118. First outer surface; 119. Second outer surface; 121. Connecting end; 122. Supporting end; 131. Microphone body; 132. First housing; 133. Second housing; 134. First support plate; 135. Sound receiving cavity; 136. Screen; 151. Speaker hole; 152. Third clasp hole; 171. First slot; 181. Second slot; 211. Sound channel; 221. Card slot; 222. Clearance slot; 231. Circular groove; 232. Locking post; 233. Fifth locking hole; 251. Silicone plate; 252. Button; 291. Sound transmission hole. Detailed Implementation

[0025] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "fixed," "linked," "communicated," "abutting," "clamping," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but it may also have additional steps not included in the figures. The process may correspond to a method, function, procedure, subroutine, subroutine, etc.

[0029] Unless otherwise stated or defined, the term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0030] In various meetings, lectures, training sessions, and other settings, amplification equipment serves as a crucial tool for ensuring the effective transmission of information, and its performance directly impacts communication effectiveness and the participant experience. However, current amplification equipment reveals numerous problems that urgently need to be addressed in practical use.

[0031] Sound attenuates with distance during propagation; this is a fundamental physical law. In a presentation setting, speakers often have to raise their voices to ensure attendees at a distance can hear clearly. However, this can lead to a situation where attendees closer to the sound system find the sound too loud, even ear-piercing, potentially causing hearing damage and distraction, thus hindering their comprehension. Conversely, attendees further away may find the sound too soft, making it difficult to hear clearly, resulting in poor information delivery.

[0032] Furthermore, when a speaker raises their voice, the sound can easily create a feedback loop between the speaker and microphone of the amplification equipment, resulting in howling. Howling is a type of noise characterized by its sharp and piercing sound. It can instantly shatter the quiet atmosphere of a meeting, seriously affecting the normal progress of the meeting and greatly reducing the meeting experience for participants. It may even lead to the meeting being interrupted or unable to proceed smoothly.

[0033] To address the aforementioned issues, this application presents a sound amplification device that avoids noise such as whistling, ensuring the smooth operation of various meetings, lectures, and training sessions, and greatly enhancing the meeting experience for participants. This sound amplification device has significant practical implications.

[0034] For ease of description, the up and down directions mentioned below are... Figure 1 Its vertical direction is consistent with the horizontal direction mentioned below. Figure 1 Its left-right direction is consistent, and the front-back direction mentioned below is consistent with it. Figure 6 Its right and left directions are consistent.

[0035] like Figures 1 to 5 As shown, this embodiment provides a sound amplification device, including a base 11, a microphone stick 12, a sound acquisition component 13, noise-reducing cotton 14, a speaker 15, and a noise-reducing microphone 16.

[0036] The base 11 has a mounting cavity 111, a sound outlet 112, and a pickup hole 113. The interior of the base 11 is hollow, forming the mounting cavity 111, which communicates with the outside of the base 11 through the sound outlet 112. The mounting cavity 111 also communicates with the outside of the base 11 through the pickup hole 113. Multiple sound outlets 112 are spaced apart, allowing sound from the speaker 15 to be transmitted to the outside of the base 11. Multiple pickup holes 113 are spaced apart, allowing noise such as howling generated by the amplification equipment to pass through and be transmitted to the noise-canceling microphone 16 for noise reduction.

[0037] The straw 12 has a connecting end 121 connected to the base 11 and a supporting end 122 extending in a direction away from the base 11. The connecting end 121 of the straw 12 can be connected to the outside of the base 11 or inserted into the mounting cavity 111 of the base 11. The supporting end 122 is located outside the base 11.

[0038] The sound acquisition component 13 is mounted on the support end 122 of the microphone stick 12, which supports the sound acquisition component 13. The sound acquisition component 13 is equivalent to a microphone, which can convert sound signals into electrical signals and transmit them to the speaker 15. Finally, the speaker 15 converts the electrical signals back into sound signals.

[0039] Noise-reducing foam 14 is fitted onto the sound acquisition component 13. Noise-reducing foam 14 is primarily used to reduce ambient noise and improve recording quality. It is typically made of high-density sponge with a multi-fiber structure or special sound-absorbing materials (such as glass wool). When sound waves pass through the fibers, due to multiple reflections, superpositions, and collisions, some energy is converted into heat, thereby weakening the sound wave intensity. Noise-reducing foam 14 has a significant absorption effect on mid-to-high frequency noise, reduces the airflow impact of popping sounds, and protects the microphone diaphragm.

[0040] Therefore, the noise-reducing cotton 14 can reduce low-frequency noise generated by airflow impact sound waves through physical isolation, while suppressing wind noise interference. The noise-reducing cotton 14 can prevent sudden sound pressure impacts from causing abnormal vibration of the diaphragm of the sound acquisition component 13, and reduce sharp popping sounds caused by microphone popping or oral noise. In addition, the noise-reducing cotton 14 can also prevent dust and oral secretions from entering the interior of the sound acquisition component 13, avoiding damage to the equipment or affecting sound quality due to moisture or stains.

[0041] The loudspeaker 15 is installed inside the mounting cavity 111 and located at the sound outlet 112. The loudspeaker 15, also called a horn, can convert electrical signals into sound signals. The sound signals propagate outward from the sound outlet 112.

[0042] The noise-canceling microphone 16 is installed inside the mounting cavity 111 and located at the pickup hole 113, facilitating sound pickup and noise reduction. The noise-canceling microphone 16 is an audio device that achieves active noise reduction through a dual-microphone array. The main microphone collects the human voice signal, while the auxiliary microphone captures ambient noise, using the volume difference to generate inverse sound waves to achieve phase cancellation. Therefore, by setting up the noise-canceling microphone 16, and then using algorithms to process the sound for noise reduction.

[0043] The speaker 15 and the noise-canceling microphone 16 are both electrically connected to the sound acquisition component 13. The speaker 15, the noise-canceling microphone 16 and the sound acquisition component 13 can be directly electrically connected or indirectly electrically connected through a circuit board.

[0044] Thus, the amplification device of this application first performs preliminary noise reduction processing on the sound using noise-reducing cotton 14, improving the sound quality of the sound collected by the sound acquisition component 13. The sound acquisition component 13 converts the sound signal into an electrical signal and transmits it to the amplification device. The speaker 15 can convert the electrical signal into a sound signal and amplify it. The whistling sound generated by the speaker 15 when playing sound is processed by the noise-reducing microphone 16, avoiding the generation of whistling sound and other noises, and improving the user experience.

[0045] like Figures 7 to 8 As shown, in one embodiment, the amplification device further includes a first bracket 17, a second bracket 18, a first vibration damper 19, and a second vibration damper 20. The first bracket 17 and the second bracket 18 are spaced apart within the mounting cavity 111, and are located at the bottom of the mounting cavity 111. The first bracket 17, the second bracket 18, and the speaker 15 act as a counterweight, lowering the center of gravity of the base 11 and improving the stability of the amplification device during placement. One side of the speaker 15 is mounted to the first bracket 17 via the first vibration damper 19, and the other side of the speaker 15 is mounted to the second bracket 18 via the second vibration damper 20. The first vibration damper 19 and the second vibration damper 20 effectively reduce the vibration transmission of the speaker 15, improving the sound pickup effect of the noise-canceling microphone 16.

[0046] Optionally, there are two first damping components 19 and two second damping components 20. Both the first damping component 19 and the second damping component 20 are suspended vibration damping silicone, that is, the first damping component 19 and the second damping component 20 are hollow silicone parts. The two sides of the speaker 15 are respectively mounted on the first bracket 17 and the second bracket 18 through the first damping component 19 and the second damping component 20, so that the speaker 15 is suspended and fixed in mid-air. This can effectively reduce the vibration transmission of the speaker 15 and improve the sound pickup effect of the sound acquisition component 13 and the noise reduction microphone 16.

[0047] Furthermore, both the first damper 19 and the second damper 20 are rotary structures. Both the first damper 19 and the second damper 20 are provided with a first fitting groove and a second fitting groove, which are spaced apart along the axis of the first damper 19 or the second damper 20. The first bracket 17 is provided with a first locking hole 171, and the second bracket 18 is provided with a second locking hole 181.

[0048] The speaker 15 has a first card plate and a second card plate on both sides respectively. The first card plate and the second card plate form a first gap and a second gap with the outer side of the speaker 15 respectively. The first card plate has a third card hole 152 communicating with the first gap, and the second card plate has a fourth card hole communicating with the second gap.

[0049] When the first vibration damper 19 is installed, one end of the first vibration damper 19 is engaged in the first locking hole 171, and the other end of the first vibration damper 19 is engaged in the third locking hole 152. That is, the edge of the first locking hole 171 is engaged in the first fitting groove of the first vibration damper 19, and the edge of the third locking hole 152 is engaged in the second fitting groove of the first vibration damper 19, thereby achieving the installation and positioning of the first vibration damper 19.

[0050] When the second vibration damper 20 is installed, one end of the second vibration damper 20 is engaged in the second locking hole 181, and the other end of the second vibration damper 20 is engaged in the fourth locking hole. That is, the edge of the second locking hole 181 is engaged in the first fitting groove of the second vibration damper 20, and the edge of the fourth locking hole is engaged in the second fitting groove of the second vibration damper 20, thereby realizing the installation and positioning of the first vibration damper 19.

[0051] Optionally, the first locking hole 171, the second locking hole 181, the third locking hole 152, and the fourth locking hole have the same structure, each including an arc groove and a strip groove. The arc groove and the strip groove are connected. The diameter of the arc groove is equal to the diameter of the first damper 19 and the second damper 20. The elastic deformation of the first damper 19 and the second damper 20 allows them to engage with the arc groove from the strip groove, thus achieving installation. The central angle of the arc trajectory of the arc groove is greater than 180 degrees, preventing the first damper 19 and the second damper 20 from separating from the first bracket 17, the second bracket 18, and the speaker 15 due to vibration.

[0052] Furthermore, the amplification device also includes vibration-damping foam 21. The speaker 15 has a sound-emitting hole 151 from which sound signals are transmitted. The vibration-damping foam 21 is square-ring-shaped and has a sound-guiding channel 211. The sound outlet 112 is located within the area enclosed by the vibration-damping foam 21 and communicates with the sound-guiding channel 211, thus connecting the sound-emitting hole 151, the sound-guiding channel 211, and the sound outlet 112 sequentially. The vibration-damping foam 21 is sandwiched between the speaker 15 and the inner wall of the mounting cavity 111, forming a seal. This allows the sound transmitted from the sound-emitting hole 151 to be directly transmitted to the sound outlet 112 via the sound-guiding channel 211, preventing sound from entering the mounting cavity 111. This avoids the sound from the speaker 15 propagating within the mounting cavity 111, preventing vibration and echo problems that could affect user experience.

[0053] Optionally, a raised ring 114 is provided on the inner wall of the mounting cavity 111, and all the sound outlets 112 are located in the area enclosed by the raised ring 114. The raised ring 114 abuts against the damping foam 21 to form a sealed space, so that the sound comes out of the speaker hole 151 of the speaker 15, passes through the sealed space and enters the sound outlet 112, and finally is transmitted to the outside of the base 11, thus preventing the sound from being transmitted into the mounting cavity 111.

[0054] like Figures 6 to 9 As shown, in one embodiment, the sound acquisition component 13 includes a first support plate 134, a microphone body 131, a first housing 132, and a second housing 133. The first housing 132 and the second housing 133 are connected and jointly fitted onto the support end 122 of the microphone rod 12. The first housing 132 and the second housing 133 are detachably connected by means of snap-fit, threaded fasteners, etc. The lower ends of the first housing 132 and the lower ends of the second housing 133 are jointly fitted onto the support end 122 of the microphone rod 12. The first housing 132 and the second housing 133 together form a sound receiving cavity 135, which is used to accommodate the microphone body 131, thereby protecting and supporting the microphone body 131. The microphone body 131 is installed in the sound receiving cavity 135 through the first support plate 134. The microphone body 131 converts sound signals into electrical signals.

[0055] Optionally, the sound acquisition component 13 also includes a mesh cover 136. The mesh cover 136 is a metal mesh such as iron mesh or steel mesh. The mesh cover 136 is fitted onto the first housing 132 and the second housing 133, and the noise-reducing cotton 14 is fitted onto the mesh cover 136. The metal mesh can protect the microphone body 131, the first housing 132, and the second housing 133, and the microphone body 131 can effectively identify and acquire external sound through the mesh openings of the metal mesh.

[0056] Furthermore, the microphone body 131 is an electret directional microphone. There are three electret directional microphones mounted on the circuit board. The electret directional microphone can effectively pick up sound in a directional manner, reduce the collection of other sounds besides the main direction, and avoid interference from the sound source.

[0057] In one embodiment, the loudspeaker further includes a base frame 22 and a connector 23 both disposed within the mounting cavity 111. The base 11 also has a socket, through which the mounting cavity 111 communicates with the outside of the base 11. The base frame 22 is disposed at the bottom of the base 11, i.e., on the bottom wall of the mounting cavity 111, and can serve as a counterweight.

[0058] The base frame 22 is provided with a slot 221, and the connector 23 is installed in the slot 221. The connecting end 121 of the microphone rod 12 passes through the insertion hole and connects to the connector 23 to realize the installation of the microphone rod 12. The microphone rod 12 is a flexible rod that can produce plastic deformation, and the sound collection angle can be adjusted.

[0059] Furthermore, the lower end face of the connecting end 121 of the straw 12 is provided with a sleeve groove. The base frame 22 is provided with a slot 221, and the connector 23 is snapped into the slot 221 and installed on the base frame 22 by screws or other fasteners. The connector 23 is provided with an annular groove 231, so that a retaining post 232 is formed on the connector 23. The connecting end 121 of the straw 12 is snapped into the annular groove 231 and sleeved onto the retaining post 232 through the sleeve groove.

[0060] The upper surface of the locking post 232 is provided with a fifth locking hole 233, and there are multiple fifth locking holes 233 arranged at intervals. The connecting end 121 of the straw 12 is provided with a protrusion that engages with the fifth locking hole 233. There are multiple protrusions, and each one corresponds to a fifth locking hole 233 to prevent the straw 12 from rotating.

[0061] Optionally, the base 11 includes a base plate 115 and a housing 116. The housing 116 is mounted on the base plate 115 and together with the base plate 115 forms a mounting cavity 111. The base plate 115 is located below the housing 116. The base plate 115 and the housing 116 are detachably connected by fasteners such as screws. The loudspeaker of this application has a simple structure, wide range of applications, simple and reliable appearance, and modular design, which facilitates assembly and disassembly.

[0062] The sound outlet 112 and the pickup hole 113 are both located on the outer casing 116, on the side of the outer casing 116. The first bracket 17, the second bracket 18, the base frame 22, and the speaker 15 are all mounted on the base plate 115. The speaker hole 151 of the speaker 15 faces the side of the outer casing 116. The noise-canceling microphone 16 is mounted on the side of the outer casing 116, thus enabling the installation of the noise-canceling microphone 16 and the speaker 15. The base plate 115 is made of materials such as iron, effectively increasing the overall weight of the amplifier equipment, which reduces vibration and prevents it from being easily pushed over by the user.

[0063] In one embodiment, the amplifier further includes a control board 24 and a control assembly 25 having a plurality of buttons 252. The control board 24 is a circuit board, mounted on a base frame 22, and has touch points corresponding to the buttons 252. The base 11 has keyholes 117. The control board 24 and the control assembly 25 are both installed in the mounting cavity 111. A portion of the control assembly 25 is located in the mounting cavity 111 and mounted on the control board 24, and the buttons 252 extend through the keyholes 117 to the outside of the base 11. The control assembly 25 also includes a silicone plate 251, on which the buttons 252 are located. By pressing the buttons 252, the corresponding positions of the silicone plate 251 press against the touch points of the control board 24, thereby controlling different functions of the amplifier, such as controlling the amplifier to turn on, off, and adjust the volume.

[0064] The control component 25, the sound acquisition component 13, the speaker 15, and the noise-canceling microphone 16 are all electrically connected to the control board 24 to control the sound amplification equipment.

[0065] The upper surface of the base frame 22 is inclined, and the control board 24 and control components 25 are stacked sequentially on the upper surface of the base frame 22, so that multiple buttons 252 are distributed along the inclined plane, allowing the buttons 252 to face the user better and facilitate user operation. The upper surface of the base frame 22 is provided with a clearance groove 222 to facilitate the layout of the circuit.

[0066] Furthermore, the amplification equipment also includes a battery holder 26 and a power supply battery 27. The power supply battery 27 is installed in the mounting cavity 111 via the battery holder 26, that is, the power supply battery 27 is installed on the base plate 115 of the base 11 via the battery holder 26. The sound acquisition component 13, the speaker 15, and the noise-canceling microphone 16 are all electrically connected to the power supply battery 27. The power supply battery 27 not only provides power to the amplification equipment but also acts as a counterweight to reduce the vibration of the amplification equipment.

[0067] Understandably, the amplification equipment can also be powered by an external power source, and the power supply battery 27 can be used when the power is off.

[0068] Optionally, the bottom surface of the base 11 is provided with silicone pads 28, that is, the lower surface of the base plate 115 is provided with silicone pads 28. There are multiple silicone pads 28 arranged at intervals. In this application, the base plate 115 is a square plate, and silicone pads 28 are provided at the four right corners of the lower surface of the base plate 115 to realize vibration reduction of the base 11, and the base 11 is not easy to slide when the sound amplification equipment is in use.

[0069] In one embodiment, the base 11 has a first outer surface 118 and a second outer surface 119 that are opposite to each other. The first outer surface 118 faces forward, and the second outer surface 119 faces backward and towards the user. The openings of the pickup hole 113 and the sound outlet hole 112 are both located on the first outer surface 118, that is, the pickup hole 113 and the sound outlet hole 112 extend from the first outer surface 118 into the mounting cavity 111. The speaker hole 151 of the loudspeaker 15 faces the sound outlet hole 112, and the sound signal can be transmitted to the user from the speaker hole 151 through the sound outlet hole 112.

[0070] The connecting end 121 of the microphone rod 12 is located between the first outer side 118 and the second outer side 119, improving the balance of the sound amplification equipment. The supporting end 122 of the microphone rod 12 extends along the direction close to the second outer side 119, which allows the sound acquisition component 13 on the supporting end 122 of the microphone rod 12 to face backward towards the user, and the speaker 15 to face forward away from the user, which can effectively reduce the interference of the sound emitted by the speaker 15 on the sound acquisition component 13 and the propagation of the vibration source.

[0071] Furthermore, the noise-canceling microphone 16 is mounted to the inner wall of the mounting cavity 111 using double-sided adhesive and covers the pickup hole 113, ensuring the airtightness of the noise-canceling microphone 16. Specifically, the noise-canceling microphone 16 is mounted on the inner wall of the mounting cavity 111 via a circuit board. This circuit board has a sound transmission hole 291 communicating with the pickup hole 113. Noise is transmitted to the noise-canceling microphone 16 through the pickup hole 113 and the sound transmission hole 291. The noise-canceling microphone 16 can effectively identify the sound played by the speaker 15 and perform algorithmic suppression to avoid feedback. The circuit board abuts against the perimeter of the pickup hole 113, forming a seal and ensuring the airtightness of the noise-canceling microphone 16.

[0072] Optionally, the noise-canceling microphone 16 is arranged adjacent to the speaker 15, and the noise-canceling microphone 16 is as close to the speaker 15 as possible, so that the noise-canceling microphone 16 can effectively collect the sound of the speaker 15, and then use the algorithm to perform noise reduction processing.

[0073] This application also provides a sound amplification system, including the sound amplification device described in any of the above embodiments. Multiple sound amplification devices are electrically connected to each other. Most sound amplification devices currently on the market have relatively simple functional designs, mainly focusing on simply amplifying volume, without fully considering the sound propagation characteristics between the sound equipment and attendees at different distances. Furthermore, when a speaker uses a large volume and the sound amplification device also increases its volume, a strong reverberation phenomenon occurs in the relatively enclosed space of a conference room. Reverberation makes the sound blurry and overlapping, increasing the difficulty of sound recognition and further interfering with attendees' understanding of the presentation content.

[0074] The public address system of this application, by employing the aforementioned public address equipment, utilizes multiple public address devices electrically connected to each other, effectively avoiding the aforementioned problems. For example, during a meeting, each participant has multiple public address devices on their desk. When the speaker is speaking, all the public address devices amplify the sound, resulting in a more uniform sound field, allowing the speaker to achieve good results without having to speak very loudly. Simultaneously, when the speaker is speaking, the noise-canceling microphone 16 inside each public address device can effectively identify the sound played by the speaker 15 and then perform algorithmic suppression to avoid feedback and other noise.

[0075] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A loudspeaker amplification device, characterized in that, include: The base (11) has a mounting cavity (111), a sound outlet (112), and a pickup hole (113); the mounting cavity (111) communicates with the outside of the base (11) through the sound outlet (112) and the pickup hole (113); The straw (12) has a connecting end (121) connected to the base (11) and a supporting end (122) extending in a direction away from the base (11); A sound acquisition component (13) is installed on the support end (122) of the wheat straw (12); Noise-reducing cotton (14) is fitted onto the sound acquisition component (13); A loudspeaker (15) is installed in the mounting cavity (111) and located at the sound outlet (112); as well as A noise-canceling microphone (16) is installed in the mounting cavity (111) and located at the pickup hole (113); The speaker (15) and the noise-canceling microphone (16) are both electrically connected to the sound acquisition component (13).

2. The amplification device according to claim 1, characterized in that, It also includes a first bracket (17), a second bracket (18), a first damping member (19), and a second damping member (20); the first bracket (17) and the second bracket (18) are arranged at intervals in the mounting cavity (111), one side of the speaker (15) is mounted on the first bracket (17) through the first damping member (19), and the other side of the speaker (15) is mounted on the second bracket (18) through the second damping member (20).

3. The amplification device according to claim 2, characterized in that, It also includes vibration damping foam (21); the loudspeaker (15) has a sound hole (151), the vibration damping foam (21) is annular and has a sound guiding channel (211), the vibration damping foam (21) is sandwiched between the loudspeaker (15) and the inner wall of the mounting cavity (111), and the sound hole (151), the sound guiding channel (211), the sound guiding channel (211) and the sound outlet (112) are connected in sequence.

4. The amplification device according to claim 1, characterized in that, The sound acquisition component (13) includes a microphone body (131), a first housing (132), and a second housing (133); the first housing (132) and the second housing (133) are connected and together fitted onto the support end (122) of the microphone rod (12), and the first housing (132) and the second housing (133) together enclose a sound receiving cavity (135), and the microphone body (131) is installed inside the sound receiving cavity (135).

5. The amplification device according to claim 4, characterized in that, The sound acquisition component (13) further includes a mesh cover (136); the mesh cover (136) is fitted onto the first housing (132) and the second housing (133), and the noise reduction cotton (14) is fitted onto the mesh cover (136).

6. The loudspeaker device according to any one of claims 1 to 5, characterized in that, It also includes a control board (24) and a control component (25) having a plurality of buttons (252); the base (11) is provided with key holes (117), the control board (24) and the control component (25) are both installed in the mounting cavity (111), the control component (25) is installed on the control board (24), and the buttons (252) extend through the key holes (117) to the outside of the base (11); The control component (25), the sound acquisition component (13), the speaker (15), and the noise-canceling microphone (16) are all electrically connected to the control board (24).

7. The loudspeaker amplification device according to any one of claims 1 to 5, characterized in that, It also includes a battery holder (26) and a power supply battery (27); the power supply battery (27) is installed in the mounting cavity (111) through the battery holder (26), and the sound acquisition component (13), the speaker (15), and the noise-canceling microphone (16) are all electrically connected to the power supply battery (27).

8. The loudspeaker device according to any one of claims 1 to 5, characterized in that, The base (11) has a first outer side (118) and a second outer side (119) that are opposite to each other; the opening of the pickup hole (113) and the opening of the sound outlet (112) are both located on the first outer side (118); the speaker hole (151) of the loudspeaker (15) faces the sound outlet (112); the connecting end (121) of the microphone rod (12) is located between the first outer side (118) and the second outer side (119); and the supporting end (122) of the microphone rod (12) extends along a direction close to the second outer side (119).

9. The amplification device according to any one of claims 1 to 5, characterized in that, The noise-canceling microphone (16) is arranged adjacent to the speaker (15).

10. A loudspeaker system, characterized in that, The device includes the loudspeaker as described in any one of claims 1 to 9; there are multiple loudspeakers, and the multiple loudspeakers are electrically connected to each other.

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