CN203721093U - Novel foam particle standing wave demonstration instrument - Google Patents
Novel foam particle standing wave demonstration instrument Download PDFInfo
- Publication number
- CN203721093U CN203721093U CN201420076084.2U CN201420076084U CN203721093U CN 203721093 U CN203721093 U CN 203721093U CN 201420076084 U CN201420076084 U CN 201420076084U CN 203721093 U CN203721093 U CN 203721093U
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- CN
- China
- Prior art keywords
- glass tube
- standing wave
- sealed glass
- frequency generator
- loudspeaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a novel foam particle standing wave demonstration instrument, and belongs to the technical field of physical experimental instrument. The novel foam particle standing wave demonstration instrument includes a frequency generator, a loudspeaker and a sealed glass tube; the frequency generator is provided with a built-in audio amplification circuit; the loudspeaker is connected onto the frequency generator and fixed on the surface of an end of the sealed glass tube; and the sealed glass tube contains foam particles. According to the utility model, standing wave phenomena can be observed by use of acoustic waves to evoke the vibration of foam particles; and the novel foam particle standing wave demonstration instrument has the beneficial effects of being simple in experimental instrument structure, being capable of observing foam particles dancing in the sealed glass tube with clear antinodes and node profiles, and demonstrating clear and vivid experimental phenomena.
Description
Technical field
The utility model relates to a kind of physical experiment apparatus, thereby specifically utilizes sound wave to evoke a kind of novel foam particle standing wave demonstrating instrument of foam beads vibration observation standing wave phenomena.
Background technology
Standing wave phenomena is a kind of special case of the interference of ripple, in laboratory, conventionally does stationary wave experiment with the string of a musical instrument, and in experimentation, the frequency of string of a musical instrument vibration is higher, and it is not very clear that antinode and node are observed.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of novel foam particle standing wave demonstrating instrument, and the frequency of sending when regulating frequency generator during to a certain particular value, can be observed lively standing wave phenomena, and the profile of antinode and node clearly.
The utility model is achieved through the following technical solutions: a kind of novel foam particle standing wave demonstrating instrument, comprises frequency generator, loudspeaker and sealed glass tube; Described frequency generator is built-in with audio amplifier circuit; Described loudspeaker are connected on frequency generator, and loudspeaker are fixed on sealed glass tube one end surfaces; In described sealed glass tube, foam beads is housed.
Principle of the present utility model is: the frequency that regulating frequency generator sends, in the time that this frequency meets specified conditions, is arranged on the sound wave that the loudspeaker on sealed glass tube send and can in sealed glass tube, produces standing wave phenomena.But sound wave is the one vibration of air, and human eye be can't see, and we utilize foam beads as medium, and the vibration of sound wave is embodied, and can be observed obvious standing wave phenomena.
The beneficial effects of the utility model are: experimental apparatus is simple in structure, can be observed foam beads and wave in sealed glass tube, have obvious antinode, node profile, and experimental phenomena is clear lively.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure: 1, frequency generator; 2, loudspeaker; 3, sealed glass tube; 4, foam beads.
Embodiment
Be below a specific embodiment of the present utility model, now by reference to the accompanying drawings the utility model be described further.
As shown in Figure 1, a kind of novel foam particle standing wave demonstrating instrument, is made up of frequency generator 1, loudspeaker 2, sealed glass tube 3 and the foam beads 4 that is contained in sealed glass tube 3; Loudspeaker 2 are connected with frequency generator 1, and frequency generator 1 is built-in with audio amplifier circuit; Loudspeaker 2 are fixed on sealed glass tube 3 one end surfaces that keep flat.
Measuring principle and method are as follows: open the power supply of frequency generator 1, the signal that frequency generator 1 sends, after audio amplifier circuit amplifies, then passes in sealed glass tube 3 by loudspeaker 2, and sound wave is propagated in sealed glass tube 3.Because sealed glass tube 3 seals, the sound wave therefore reflecting and the stack of original sound wave.When the length L of sealed glass tube 3 meets:
(λ represents the wavelength of sound wave),
?
when (u represents that sound wave propagation velocity, ν represent sound wave frequency), namely
time, sound wave will form standing wave in sealed glass tube 3.The crest of standing wave and node because can evoking foam beads 4, sound wave vibrate, so can be shown by " dancing " of foam beads 4 in sealed glass tube 3.The frequency of sending by the generator 1 of adjusting frequency can change and in sealed glass tube 3, form standing wave number.Observe the motion conditions of foam beads 4 in sealed glass tube 3, can find to remain static at nodal point foam beads 4; In the amplitude maximum of antinodal point foam beads 4; At other each point foam beads 4 with different amplitude vibrations.
Claims (1)
1. a novel foam particle standing wave demonstrating instrument, is characterized in that: comprise frequency generator (1), loudspeaker (2) and sealed glass tube (3); Described frequency generator (1) is built-in with audio amplifier circuit; It is upper that described loudspeaker (2) are connected to frequency generator (1), and loudspeaker (2) are fixed on sealed glass tube (3) one end surfaces; In described sealed glass tube (3), foam beads (4) is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420076084.2U CN203721093U (en) | 2014-02-21 | 2014-02-21 | Novel foam particle standing wave demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420076084.2U CN203721093U (en) | 2014-02-21 | 2014-02-21 | Novel foam particle standing wave demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203721093U true CN203721093U (en) | 2014-07-16 |
Family
ID=51160231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420076084.2U Expired - Fee Related CN203721093U (en) | 2014-02-21 | 2014-02-21 | Novel foam particle standing wave demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203721093U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166081A (en) * | 2018-03-23 | 2018-06-15 | 北京化工大学 | A kind of sound standing wave auxiliary electrostatic device for spinning |
| CN109448515A (en) * | 2016-07-11 | 2019-03-08 | 重庆理工大学 | Standing wave demonstrating instrument |
| CN111435576A (en) * | 2019-01-15 | 2020-07-21 | 合肥探奥教育科技有限公司 | Device for demonstrating standing wave phenomenon |
-
2014
- 2014-02-21 CN CN201420076084.2U patent/CN203721093U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448515A (en) * | 2016-07-11 | 2019-03-08 | 重庆理工大学 | Standing wave demonstrating instrument |
| CN108166081A (en) * | 2018-03-23 | 2018-06-15 | 北京化工大学 | A kind of sound standing wave auxiliary electrostatic device for spinning |
| CN111435576A (en) * | 2019-01-15 | 2020-07-21 | 合肥探奥教育科技有限公司 | Device for demonstrating standing wave phenomenon |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20150221 |
|
| EXPY | Termination of patent right or utility model |