Sound wave interference demonstration instrument

Abstract

The utility model discloses a sound wave interference demonstration instrument, which comprises a base, a sound intensity instrument is arranged on the base, a second three-way pipe is communicated and fixed at the input end of the sound intensity instrument, a shell is arranged on one side of the sound intensity instrument, a first three-way pipe is communicated and fixed at the output end of the shell, one output end of the first three-way pipe is communicated and connected with a first U-shaped pipe, and the other output end of the first U-shaped pipe is communicated and connected with a second U-shaped pipe. The output end of the first U-shaped pipe is connected to one input end of the second three-way pipe in a communicating mode, and the other output end of the first three-way pipe is connected with an adjusting pipe assembly in a communicating mode. According to the utility model, the closed transparent symmetrical tube type sound path structure is adopted as a propagation path of sound waves, so that the sound energy loss is small, and the adjusting tube assembly can accurately adjust the length of the sound path, so that the wave crests and the wave troughs of sine wave sound signals can be conveniently adjusted to be superposed, and the sound wave interference phenomenon is more obvious; meanwhile, the sound intensity instrument is adopted to visually display the intensity of sound signals, so that the experiment result is more visual.

Description

Technical Field

[0001] The utility model relates to the technical field of physics experiment demonstration equipment, in particular to a sound wave interference demonstration instrument. Background Art

[0002] Acoustic interference refers to the process in which two or more sound waves meet and overlap in space to produce interference. When two sound waves meet, constructive and destructive phenomena will occur, thus forming interference fringes. In the prior art, the demonstration of acoustic interference phenomenon is generally achieved through tuning fork resonance, but the experimental results of tuning fork resonance are not obvious, so an acoustic interference demonstrator is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide an acoustic wave interference demonstrator to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: an acoustic wave interference demonstrator, comprising a base, on which a sound intensity meter is arranged, an input end of the sound intensity meter is conductively fixed with a second three-way tube, a shell is arranged on one side of the sound intensity meter, an output end of the shell is conductively fixed with a first three-way tube, one of the output ends of the first three-way tube is conductively connected to a first U-shaped tube, and the output end of the first U-shaped tube is conductively connected to one of the input ends of the second three-way tube, the other output end of the first three-way tube is conductively connected to an adjusting tube assembly, and the output end of the adjusting tube assembly is conductively connected to the other input end of the second three-way tube.

[0005] Preferably, a sound source socket is provided at the input end of the shell.

[0006] Preferably, both output ends of the first three-way pipe are connected and fixed with a first elbow, the output end of the first elbow is connected and fixed with a second elbow, and the input end of the first U-shaped pipe is connected and fixed to the output end of one of the second elbows, and the input end of the adjusting tube assembly is connected and fixed to the output end of the other second elbow.

[0007] Preferably, both input ends of the second three-way pipe are connected and fixed with the third bend pipe, the input end of the third bend pipe is connected and fixed with the fourth bend pipe, and the output end of the first U-shaped pipe is connected and fixed to the input end of one of the fourth bend pipes, and the output end of the adjusting pipe assembly is connected and fixed to the input end of the other fourth bend pipe.

[0008] Preferably, the adjusting tube assembly includes a screw rod, a nut, a bracket, a knob, a second U-shaped tube, a connecting tube and a scale, and the screw rod is rotatably connected to the base, a nut is threadedly connected to the screw rod, a bracket is fixedly connected to the nut, and two ends of the second U-shaped tube are respectively fixedly connected to two ends of the bracket, and both ends of the second U-shaped tube are slidably connected to connecting tubes, and one of the connecting tubes is fixedly connected to the output end of the second bend pipe, and the other connecting tube is fixedly connected to the input end of the fourth bend pipe.

[0009] Preferably, a knob is fixedly connected to the top end of the screw rod, and scales are provided on both connecting tubes.

[0010] Preferably, the second curved pipe and the fourth curved pipe are both provided with clamps, and the clamps are fixedly connected to the base.

[0011] The acoustic interference demonstrator provided by the utility model has the advantages that: the utility model adopts a closed transparent symmetrical tubular sound path structure as the propagation path of the sound wave, so the sound energy loss is small, and the adjustment tube component of the utility model can accurately adjust the length of the sound path, so as to adjust the peaks and troughs of the sinusoidal wave sound signal to superimpose, making the acoustic interference phenomenon more obvious, and at the same time, the utility model adopts a sound intensity meter to visualize the strength of the sound signal, making the experimental results more intuitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0014] Figure 2 for Figure 1 A magnified view of the structure in area A.

[0015] In the figure: 1. base; 11. shell; 12. sound source socket; 13. first three-way pipe; 14. first elbow; 15. second elbow; 16. first U-shaped pipe; 17. sound intensity meter; 18. second three-way pipe; 19. third elbow; 110. fourth elbow; 2. adjustment pipe assembly; 21. screw rod; 22. nut; 23. bracket; 24. knob; 25. second U-shaped pipe; 26. connecting pipe; 27. scale; 3. clamp. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] Please see attached Figure 1 -Attached Figure 2The utility model provides an embodiment: a sound wave interference demonstrator, comprising a base 1, on which a sound intensity meter 17 is arranged, the input end of the sound intensity meter 17 is connected and fixed with a second three-way tube 18, a shell 11 is arranged on one side of the sound intensity meter 17, the output end of the shell 11 is connected and fixed with a first three-way tube 13, one of the output ends of the first three-way tube 13 is connected and connected with a first U-shaped tube 16, and the output end of the first U-shaped tube 16 is connected and connected to one of the input ends of the second three-way tube 18, the other output end of the first three-way tube 13 is connected and connected with an adjustment tube assembly 2, and the output end of the adjustment tube assembly 2 is connected and connected to the other input end of the second three-way tube 18, the sound intensity meter 17 is used to visually measure the intensity of the sound wave The shell 11 is used to connect the sound source, the first U-shaped tube 16 is a transmission pipeline for one of the sound waves, and the regulating tube assembly 2 is a transmission pipeline for the other sound wave; the input end of the shell 11 is provided with a sound source socket 12, and the sound source socket 12 is used to connect the sound source; the two output ends of the first three-way tube 13 are both connected and fixed with the first elbow 14, the output end of the first elbow 14 is connected and fixed with the second elbow 15, and the input end of the first U-shaped tube 16 is connected and fixed to the output end of one of the second elbows 15, and the input end of the regulating tube assembly 2 is connected and fixed to the output end of the other second elbow 15, and the first elbow 14 and the second elbow 15 constitute a sound wave transmission pipeline; the two input ends of the second three-way tube 18 are both connected and fixed with the third The input end of the third bend 19 is connected and fixed with a fourth bend 110, and the output end of the first U-shaped tube 16 is connected and fixed to the input end of one of the fourth bends 110, and the output end of the adjusting tube assembly 2 is connected and fixed to the input end of another fourth bend 110, and the third bend 19 and the fourth bend 110 constitute a sound wave transmission pipeline; the adjusting tube assembly 2 includes a screw rod 21, a nut 22, a bracket 23, a knob 24, a second U-shaped tube 25, a connecting tube 26 and a scale 27, and the screw rod 21 is rotatably connected to the base 1, the screw rod 21 is threadedly connected with a nut 22, the nut 22 is fixedly connected with the bracket 23, and the two ends of the second U-shaped tube 25 are respectively fixedly connected to the two ends of the bracket 23, and the second U Both ends of the U-shaped tube 25 are slidably connected with connecting tubes 26, and one of the connecting tubes 26 is fixedly connected to the output end of the second curved tube 15, and the other connecting tube 26 is fixedly connected to the input end of the fourth curved tube 110. The screw rod 21 is used to drive the nut 22, so that the second U-shaped tube 25 on the bracket 23 slides along the connecting tube 26, so as to adjust the height of the second U-shaped tube 25; a knob 24 is fixedly connected to the top of the screw rod 21, and scales 27 are provided on the two connecting tubes 26. The knob 24 is used to rotate the screw rod 21, and the scale 27 is used to facilitate reading the height of the second U-shaped tube 25; a clamp 3 is installed on the second curved tube 15 and the fourth curved tube 110, and the clamp 3 is fixedly connected to the base 1, and the clamp 3 is used to fix the pipeline.

[0018] Working principle: When the utility model is used for sound interference demonstration, the sound source is connected to the housing 11 through the sound source socket 12, and the sound is transmitted to the pipelines composed of two groups of first elbows 14 and second elbows 15 through the output end of the first three-way pipe 13, one of the sounds enters the first U-shaped pipe 16, and the other sound enters the second U-shaped pipe 25 through the connecting pipe 26 and is output from the other connecting pipe 26. The two sounds are respectively transmitted to the second three-way pipe 18 through the pipelines composed of two groups of fourth elbows 110 and the third elbow 19, and the second three-way pipe 18 transmits the sound to the first U-shaped pipe 16, and the other sound enters the second U-shaped pipe 25 through the connecting pipe 26, and is output from the other connecting pipe 26. The sound intensity meter 17 on the base 1 displays the sound intensity visually. In the above process, the knob 24 can be turned to drive the screw 21 to rotate, and the screw 21 drives the bracket 23 through the nut 22. The second U-shaped tube 25 on the bracket 23 is raised and lowered along the connecting tube 26 to adjust the superposition of the peaks and troughs of the sinusoidal wave sound signal, so that the sound interference phenomenon is more obvious. The specific height of the second U-shaped tube 25 can be observed through the scale 27. The clamp 3 is used to fix the pipeline, and the pipeline structure in the pipeline is made of transparent materials.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An acoustic wave interference demonstrator, comprising a base (1), characterized in that: The base (1) is provided with a sound intensity meter (17), the input end of the sound intensity meter (17) is conductively connected to a second three-way tube (18), a shell (11) is provided on one side of the sound intensity meter (17), the output end of the shell (11) is conductively connected to a first three-way tube (13), one of the output ends of the first three-way tube (13) is conductively connected to a first U-shaped tube (16), and the output end of the first U-shaped tube (16) is conductively connected to one of the input ends of the second three-way tube (18), the other output end of the first three-way tube (13) is conductively connected to an adjustment tube assembly (2), and the output end of the adjustment tube assembly (2) is conductively connected to the other input end of the second three-way tube (18).

2. The acoustic wave interference demonstrator according to claim 1, characterized in that: The input end of the housing (11) is provided with a sound source socket (12).

3. The acoustic wave interference demonstrator according to claim 1, characterized in that: Both output ends of the first three-way pipe (13) are conductively fixed to a first elbow pipe (14), the output end of the first elbow pipe (14) is conductively fixed to a second elbow pipe (15), and the input end of the first U-shaped pipe (16) is conductively fixed to the output end of one of the second elbow pipes (15), and the input end of the regulating pipe assembly (2) is conductively fixed to the output end of the other second elbow pipe (15).

4. The acoustic wave interference demonstrator according to claim 1, characterized in that: The two input ends of the second three-way pipe (18) are both connected and fixed to the third elbow pipe (19), the input end of the third elbow pipe (19) is connected and fixed to the fourth elbow pipe (110), and the output end of the first U-shaped pipe (16) is connected and fixed to the input end of one of the fourth elbow pipes (110), and the output end of the regulating pipe assembly (2) is connected and fixed to the input end of the other fourth elbow pipe (110).

5. The acoustic wave interference demonstrator according to claim 4, characterized in that: The regulating tube assembly (2) comprises a screw rod (21), a nut (22), a bracket (23), a knob (24), a second U-shaped tube (25), a connecting tube (26) and a scale (27), wherein the screw rod (21) is rotatably connected to the base (1), the screw rod (21) is threadedly connected to a nut (22), the nut (22) is fixedly connected to the bracket (23), and two ends of the second U-shaped tube (25) are respectively fixedly connected to two ends of the bracket (23), and two ends of the second U-shaped tube (25) are slidably connected to connecting tubes (26), and one of the connecting tubes (26) is fixedly connected to the output end of the second curved tube (15), and the other connecting tube (26) is fixedly connected to the input end of the fourth curved tube (110).

6. The acoustic wave interference demonstrator according to claim 5, characterized in that: The top end of the screw rod (21) is fixedly connected with a knob (24), and scales (27) are provided on the two connecting pipes (26).

7. The acoustic wave interference demonstrator according to claim 5, characterized in that: The second curved pipe (15) and the fourth curved pipe (110) are both provided with a clamp (3), and the clamp (3) is fixedly connected to the base (1).

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