CN201207235Y - Sound wave resonance demonstration instrument - Google Patents
Sound wave resonance demonstration instrument Download PDFInfo
- Publication number
- CN201207235Y CN201207235Y CNU2007201824076U CN200720182407U CN201207235Y CN 201207235 Y CN201207235 Y CN 201207235Y CN U2007201824076 U CNU2007201824076 U CN U2007201824076U CN 200720182407 U CN200720182407 U CN 200720182407U CN 201207235 Y CN201207235 Y CN 201207235Y
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- sound wave
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- metal
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Abstract
The utility model relates to a device for utilizing sound wave to result in the resonance of object, which is suitable to be used as demonstration experiment in the class of middle school in order to overcome the problem of little sound wave energy, weak vibration amplitude, and being uneasy to be observed by eyes directly. The utility model is characterized in that: the vibration phenomenon of object is converted to the jumping phenomenon of Pingpong for the purpose of observation, so as to improve visibility of experimental phenomenon at the max extent. The device comprises an audio frequency generator, a horn, a bracket, a pingpong suspended by thin threads, a metal tank, and a small magnet used to change the fixed frequency of the metal tank. The utility model has simple material selection, convenient assembly and is easy to be popularized.
Description
Technical field
The utility model relates to a kind of sound wave and causes object that the device of resonance takes place, and is applicable in the classroom, middle school as lecture experiment.
Background technology
Resonance is a kind of mechanics phenomenon that everybody is familiar with, and clear and definite study requirement is arranged in the physics teaching in secondary school outline.The teacher often utilizes single pendulum bead or spring leaf to carry out lecture experiment on the classroom at ordinary times, but because the restriction of experiment equipment seldom relates to the phenomenon demonstration that sound wave causes object resonance.
Summary of the invention
Small in order to overcome acoustic wave energy, cause that the object vibration amplitude is faint, be difficult for the difficulty of Direct observation with the naked eye, the jump phenomena that the utility model adopts the oscillation phenomenon with object to be converted into table tennis is observed, and increases substantially the visibility of experimental phenomena.
The concrete technical scheme of the utility model is: loudspeaker are connected with audio-frequency generator (scalable frequency of sound wave), loudspeaker are aimed at a metal can jar mouth that is fixed on the support, metal can instigates to vibrate down (because Oscillation Amplitude is very little, the situation of Direct observation vibration with the naked eye) at sound wave.One table tennis is hung with a fine rule, lean to bottom, will see that table tennis takes place significantly to jump at metal can.Regulate the audible frequency of audio-frequency generator, the amplitude that can observe the table tennis jump changes, and the amplitude that can observe the table tennis jump under certain frequency reaches maximum, and resonance effect promptly takes place.One small magnet is adsorbed on the bottom of metal can, adjusts the position of small magnet, changes the weight of magnet, can change the natural frequency of metal can.
Great advantage of the present utility model is exactly that oscillation phenomenon with the object jump phenomena that is converted into table tennis is observed, and increases substantially the visibility of experimental phenomena.Because it is very simple that instrument is drawn materials, assembling is very convenient, so be easy to promote.The student understands resonance effect and occurrence condition thereof by the jumping phenomena of observing table tennis, and existing resonance laboratory is played good supplementary function, reaches extraordinary teaching efficiency.
Description of drawings
Below in conjunction with accompanying drawing and concrete experimental procedure the utility model is further specified.
This figure is an embodiment principle schematic of the present utility model.
1. audio-frequency generators among the figure, 2. lead, 3. loudspeaker, 4. iron stand, 5. metal can, 6. fine rule, 7. small magnet, 8. table tennis
Embodiment
In the drawings, loudspeaker 3 are connected with audio-frequency generator 1, and loudspeaker 3 are aimed at opening one end of metal cans 5, and metal can 5 is vibrated, and with the bottom of hand touch metal can 5, can feel the vibration of can body significantly.Table tennis 8 usefulness fine rules 6 are hung, lean to, will see the jump that table tennis 8 takes place by a relatively large margin in the bottom of metal can 5.Regulate the audible frequency of audio-frequency generator 1, the amplitude that can observe table tennis 8 jumps changes, and the amplitude that can observe table tennis 8 jumps when being adjusted to certain frequency reaches maximum, and resonance effect promptly takes place.Also can be adsorbed on the diverse location of metal can 5 with a small magnet 7, perhaps change the weight of magnet 7, change the natural frequency of metal can 5, the frequency of regulating audio-frequency generator 1 again, debugging repeatedly can reach new resonance once again.
Claims (2)
1, a kind of acoustic resonance demonstrator is characterized in that: loudspeaker are connected with audio-frequency generator, and loudspeaker are aimed at a metal can, metal can is fixed on the iron stand, and a table tennis is hung with a fine rule, leans to the bottom at metal can.
2, acoustic resonance demonstrator according to claim 1, it is characterized in that: the bottom at metal can is adsorbed with small magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201824076U CN201207235Y (en) | 2007-09-19 | 2007-09-19 | Sound wave resonance demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201824076U CN201207235Y (en) | 2007-09-19 | 2007-09-19 | Sound wave resonance demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201207235Y true CN201207235Y (en) | 2009-03-11 |
Family
ID=40466295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201824076U Expired - Fee Related CN201207235Y (en) | 2007-09-19 | 2007-09-19 | Sound wave resonance demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201207235Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105788411A (en) * | 2016-04-30 | 2016-07-20 | 陈显盈 | Resonant demonstration instrument |
| CN105825750A (en) * | 2016-05-28 | 2016-08-03 | 陈显盈 | Tuning fork resonance and vibration image demonstration instrument |
| CN105894915A (en) * | 2016-05-20 | 2016-08-24 | 陈显盈 | Novel tuning fork resonance demonstration instrument |
| CN105931538A (en) * | 2016-06-02 | 2016-09-07 | 陈显盈 | Double-tuning-fork resonance demonstrator |
| CN111564091A (en) * | 2020-06-04 | 2020-08-21 | 清华大学 | Interactive tuning fork resonance device |
-
2007
- 2007-09-19 CN CNU2007201824076U patent/CN201207235Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105788411A (en) * | 2016-04-30 | 2016-07-20 | 陈显盈 | Resonant demonstration instrument |
| CN105894915A (en) * | 2016-05-20 | 2016-08-24 | 陈显盈 | Novel tuning fork resonance demonstration instrument |
| CN105825750A (en) * | 2016-05-28 | 2016-08-03 | 陈显盈 | Tuning fork resonance and vibration image demonstration instrument |
| CN105931538A (en) * | 2016-06-02 | 2016-09-07 | 陈显盈 | Double-tuning-fork resonance demonstrator |
| CN111564091A (en) * | 2020-06-04 | 2020-08-21 | 清华大学 | Interactive tuning fork resonance device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090311 Termination date: 20091019 |