Acoustic teaching aid

Abstract

The utility model discloses an acoustics teaching aid, which relates to the field of teaching aids, and comprises a vacuum box, a simulation tube is fixed in the vacuum box, the simulation tube comprises two groups of organic glass tubes, and the organic glass tubes are designed to be through up and down. In order to enable students to more intuitively understand the sound transmission principle, the innovative acoustic teaching aid is elaborately developed, has a unique simulation function, can accurately restore a sound transmission medium experiment scene in a vacuum environment, and can create an approximately vacuum state in the experiment process, so that the teaching aid can be used for teaching a sound transmission medium. Students can clearly observe the phenomenon that the sound cannot be transmitted at the moment, then the common medium air is introduced, and the students can obviously perceive that the sound is transmitted again through contrast experiments, so that the key effect on sound transmission when the air is used as the medium is powerfully verified in a vivid and visual mode, and the sound transmission efficiency is improved. And the teaching effect is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of teaching aids, specifically an acoustic teaching aid. Background Technology

[0002] Acoustic teaching aids are auxiliary tools used for teaching demonstrations, experimental explorations, and knowledge explanations. By intuitively demonstrating sound phenomena and their physical laws, they help students understand abstract acoustic concepts. They can dynamically present processes such as sound source vibration, medium transmission, and energy conversion. They are suitable for primary and secondary school physics classrooms and popular science education activities, serving as a bridge between theoretical teaching and practical experience.

[0003] Existing acoustic teaching aids lack a demonstration tool that can show whether sound can travel normally in a vacuum environment. Students cannot intuitively understand the practical application of air as a medium for sound transmission. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: an acoustic teaching aid, including a vacuum box, wherein a simulation tube is fixed inside the vacuum box, the simulation tube includes an acrylic tube, the acrylic tube is designed to run vertically through the tube, the acrylic tube is provided in two sets, and a silicone connector is fixedly connected at the connection point of the two sets of acrylic tubes, and a silicone mesh pad is adhered and fixed to the surface of the silicone connector.

[0005] Preferably, a speaker is attached and fixed to the inner wall of the bottom end of the plexiglass tube, the speaker is electrically connected to a music mechanism by wires, and an anti-static ball is placed above the speaker.

[0006] Preferably, the antistatic balls are arranged in several groups and are evenly placed above the speaker and the silicone mesh pad.

[0007] Preferably, the vacuum chamber includes a main body, a support plate is fixedly connected to one side of the main body, the support plate is provided in two sets, each set of support plates is rotatably connected to a connector by a pin, a front cover plate is fixedly connected to one end of the connector, and a handle is fixedly connected to the surface of the front cover plate.

[0008] Preferably, the top of the main body of the box has an opening, and a negative pressure gauge is fixed inside the opening. One end of the negative pressure gauge is fixedly connected to an air extraction pipe.

[0009] Preferably, a battery is electrically connected to the top of the music mechanism to power the music mechanism.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention presents an acoustic teaching aid. In physics acoustics teaching, to help students more intuitively understand the principles of sound propagation, we have meticulously developed this innovative acoustic teaching aid. It possesses a unique simulation function, accurately recreating the experimental scenario of sound transmission medium in a vacuum environment. During the experiment, the teaching aid can create a near-vacuum state, allowing students to clearly observe the phenomenon that sound cannot propagate. Subsequently, by introducing air, a common medium, and through comparative experiments, students can clearly perceive that sound can propagate again. In this way, it powerfully verifies the crucial role of air as a medium for sound transmission in a vivid and intuitive manner, greatly improving the teaching effect. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0015] Figure 3 This is a schematic diagram of the simulated tube structure of this utility model;

[0016] Figure 4 This is a disassembled diagram of the analog tube of this utility model.

[0017] As shown in the figure: 1. Vacuum chamber; 11. Main body of the chamber; 12. Connector; 13. Front cover; 14. Handle; 15. Negative pressure gauge; 16. Evacuation pipe; 2. Simulation tube; 21. Acrylic glass tube; 22. Silicone connector; 23. Silicone mesh pad; 24. Speaker; 25. Music mechanism; 26. Antistatic ball. Detailed Implementation

[0018] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0019] Please see Figures 1 to 4 This utility model provides a technical solution: an acoustic teaching tool, including a vacuum box 1, a simulation tube 2 fixed inside the vacuum box 1, the simulation tube 2 including an plexiglass tube 21, the plexiglass tube 21 is designed to run through from top to bottom, the plexiglass tube 21 is provided in two sets, the connection of the two sets of plexiglass tubes 21 is fixedly connected with a silicone connector 22, and a silicone mesh pad 23 is glued and fixed on the surface of the silicone connector 22.

[0020] In teaching physics acoustics, to help students understand the principle of sound propagation more intuitively, we have carefully developed this innovative acoustic teaching aid. It has a unique simulation function that can accurately reproduce the experimental scenario of sound transmission medium in a vacuum environment. During the experiment, the teaching aid can create a near-vacuum state, allowing students to clearly observe the phenomenon that sound cannot propagate at this time. Then, by introducing air as a common medium, through comparative experiments, students can clearly perceive that sound can propagate again. In this way, the key role of air as a medium for sound transmission is powerfully verified in a vivid and intuitive way, greatly improving the teaching effect.

[0021] A speaker 24 is attached to the inner wall of the bottom end of the plexiglass tube 21. The speaker 24 is electrically connected to a music mechanism 25 via wires. An anti-static ball 26 is placed above the speaker 24.

[0022] Several groups of antistatic balls 26 are provided and are evenly placed above the speaker 24 and the silicone mesh pad 23;

[0023] The vacuum chamber 1 includes a main body 11. A support plate is fixedly connected to one side of the main body 11. The support plate is provided in two sets. Each set of support plates is rotatably connected to a connector 12 by a pin. A front cover plate 13 is fixedly connected to one end of the connector 12. A handle 14 is fixedly connected to the surface of the front cover plate 13.

[0024] An opening is provided at the top of the main body 11 of the box, and a negative pressure gauge 15 is fixed inside the opening. One end of the negative pressure gauge 15 is fixedly connected to an air extraction pipe 16.

[0025] A battery is electrically connected to the top of the music mechanism 25, which powers the music mechanism 25.

[0026] During use, remove the upper-layer acrylic tube 21, silicone connector 22, and silicone mesh pad 23. Connect the external vacuum pump to the vacuum pipe 16. First, conduct the experiment while ensuring there is air inside the vacuum chamber 1. The battery powers the music mechanism 25, which in turn powers the speaker 24. When the speaker 24 emits sound, it causes the antistatic ball 26 above to bounce inside the lower-layer acrylic tube 21. By adjusting the volume of the speaker 24, the bouncing height of the antistatic ball 26 can be observed; the higher the volume, the higher the bouncing height of the antistatic ball 26. After evacuating the air from the vacuum chamber 1 using the vacuum pump, conduct the experiment again. It will be found that the bouncing state of the antistatic ball 26 remains unchanged. At this point, turn off the vacuum pump. Pull the front cover 13 outward using handle 14 to open the vacuum chamber 1. Reinstall the upper organic glass tube 21, silicone connector 22, and silicone mesh pad 23. Start the speaker 24 again. At this time, observe how the antistatic ball 26 above the speaker 24 and the antistatic ball 26 on the silicone mesh pad 23 bounce. Turn on the vacuum pump again. While ensuring the internal vacuum, observe the bounce of the two antistatic balls 26 again. It will be found that the lower antistatic ball 26 bounces without being affected, while the upper antistatic ball 26 stops bouncing. Through the above experiment, it can be concluded that the vacuum has no effect on the vibration of the sound-producing body. Under normal conditions, sound can propagate, but under vacuum conditions, sound cannot propagate.

[0027] The selection of experimental equipment is relevant to daily life, reflecting the new curriculum concept of "from life to physics." The materials are readily available and inexpensive. The design and improvements to the experiment avoid the problem of low volume; the volume can be adjusted according to the music mechanism 25, ensuring that all students in the class can hear and see clearly, and the experimental phenomena are obvious. Because the antistatic ball 26 stays suspended in the air during its bouncing process, problems such as vibrations that are too fast to see clearly or too weak to see are avoided, thus achieving visualization of the vibration. The antistatic ball 26 is made of foam material, which is highly sensitive to vibration, thereby amplifying the experimental phenomena.

[0028] The experimental setup design follows the same main body as the previous setup, demonstrating consistency in the thematic thread. It effectively deepens students' understanding of the knowledge content. The experiment employs a progressive approach, starting with observation and verification before designing new experiments, reflecting the rigor and scientific nature of physics research. First, it verifies whether the upcoming new experimental environment will affect the research subject; only after confirming no impact does it proceed with new experimental investigation. This eliminates students' doubts. Throughout the experiment, the sound-producing body is the research object, without going through multiple layers of sound propagation, making the research object more straightforward. The experimental phenomena are obvious, observable with the naked eye, and the entire process can be repeatedly observed, revealing the reversible process of sound propagation in a vacuum. The entire experimental process is visualized, eliminating the need to discern subtle changes in sound amidst noise, avoiding subjective assumptions, and showcasing the core competencies of physics.

[0029] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0030] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An acoustic teaching aid, characterized in that: The device includes a vacuum chamber (1), inside which a simulation tube (2) is fixed. The simulation tube (2) includes an acrylic tube (21), which is designed to run vertically through the tube. There are two sets of acrylic tubes (21), and a silicone connector (22) is fixedly connected at the connection between the two sets of acrylic tubes (21). A silicone mesh pad (23) is attached to the surface of the silicone connector (22).

2. The acoustic teaching aid according to claim 1, characterized in that: A speaker (24) is attached to the inner wall of the bottom end of the plexiglass tube (21). The speaker (24) is electrically connected to a music mechanism (25) by wires. An antistatic ball (26) is placed above the speaker (24).

3. An acoustic teaching aid according to claim 2, characterized in that: The antistatic balls (26) are arranged in several groups and are evenly placed above the speaker (24) and the silicone mesh pad (23).

4. An acoustic teaching aid according to claim 3, characterized in that: The vacuum chamber (1) includes a main body (11). A support plate is fixedly connected to one side of the main body (11). The support plate is provided in two sets. Each set of support plates is rotatably connected to a connector (12) by a pin. A front cover plate (13) is fixedly connected to one end of the connector (12). A handle (14) is fixedly connected to the surface of the front cover plate (13).

5. An acoustic teaching aid according to claim 4, characterized in that: The top of the main body (11) of the box has an opening, and a negative pressure gauge (15) is fixed inside the opening. One end of the negative pressure gauge (15) is fixedly connected to an air extraction pipe (16).

6. An acoustic teaching aid according to claim 5, characterized in that: The top of the music mechanism (25) is electrically connected to a battery, which powers the music mechanism (25).

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