CN204614309U - A kind of physics teaching sound propagation demonstrator - Google Patents
A kind of physics teaching sound propagation demonstrator Download PDFInfo
- Publication number
- CN204614309U CN204614309U CN201520267090.0U CN201520267090U CN204614309U CN 204614309 U CN204614309 U CN 204614309U CN 201520267090 U CN201520267090 U CN 201520267090U CN 204614309 U CN204614309 U CN 204614309U
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- closed container
- acoustic control
- control lamp
- described closed
- water vat
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Abstract
The utility model discloses a kind of physics teaching sound propagation demonstrator, comprise a closed container, a small-sized water vat is provided with in described closed container, filled with water in described small-sized water vat, the first loudspeaker and the first acoustic control lamp is provided with in described small-sized water vat, the second loudspeaker and the second acoustic control lamp is provided with in described closed container, described closed container is connected with an air pump, the outer wall of described closed container is provided with the first horn switch, second horn switch, first acoustic control lamp switch and the second acoustic control lamp switch, described closed container is also provided with an air hole, described air hole is plugged with a rubber stopper, described closed container and water vat are made by transparent plastic.The beneficial effect that the utility model obtains is: (1) structure is simple; (2) by the first acoustic control lamp and the second acoustic control lamp whether luminous, confirm that the propagation of sound needs medium, if do not have medium, namely under the condition of vacuum, sound can not be propagated.
Description
Technical field
The utility model relates to a kind of physics teaching demonstration device, particularly a kind of physics teaching sound propagation demonstrator.
Background technology
At present, in physics teaching in secondary school practice, can relate to sound propagation properties, namely the propagation of sound needs medium, if there is no medium, then sound cannot be propagated, and sound cannot be propagated in a vacuum, in addition, sound can be propagated in other media, although this characteristic is easy to memory, owing to lacking necessary demonstration instrument, thus students is difficult to understand fast and grasp this knowledge point.
Summary of the invention
Problem to be solved in the utility model is: provide the physics teaching sound propagation demonstrator that a kind of structure is simple, propagation that is that can student be helped intuitively to understand sound needs this physical characteristics of medium.
In order to solve the problems of the technologies described above, physics teaching sound propagation demonstrator of the present utility model, comprise a closed container, a small-sized water vat is provided with in described closed container, filled with water in described small-sized water vat, the first loudspeaker and the first acoustic control lamp is provided with in described small-sized water vat, the second loudspeaker and the second acoustic control lamp is provided with in described closed container, described closed container is connected with an air pump, the outer wall of described closed container is provided with the first horn switch, second horn switch, first acoustic control lamp switch and the second acoustic control lamp switch, described closed container is also provided with an air hole, described air hole is plugged with a rubber stopper.
Conveniently observe the first acoustic control lamp and whether the second acoustic control lamp is luminous, physics teaching sound propagation demonstrator of the present utility model, described closed container and water vat are made by transparent plastic.
The beneficial effect that the utility model obtains is: (1) structure is simple; (2) by the first acoustic control lamp and the second acoustic control lamp whether luminous, confirm that the propagation of sound needs medium, if do not have medium, namely under the condition of vacuum, sound can not be propagated; (3) closed container and small-sized water vat are transparent plastic and make, and conveniently observe presentation process.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1, closed container, the 2, second acoustic control lamp, 3, rubber stopper, 4, air hole, the 5, first acoustic control lamp,
6, small-sized water vat, 7, water, the 8, first loudspeaker, the 9, second loudspeaker, 10, air pump, the 11, first horn switch,
12, the second horn switch, the 13, first acoustic control lamp switch, the 14, second acoustic control lamp switch.
Embodiment
As shown in Figure 1, physics teaching sound propagation demonstrator of the present utility model, comprise a closed container 1, a small-sized water vat 6 is provided with in described closed container 1, filled with water 7 in described small-sized water vat 6, the first loudspeaker 8 and the first acoustic control lamp 5 is provided with in described small-sized water vat 6, the second loudspeaker 9 and the second acoustic control lamp 2 is provided with in described closed container 1, described closed container 1 is connected with an air pump 10, the outer wall of described closed container 1 is provided with the first horn switch 11, second horn switch 12, first acoustic control lamp switch 13 and the second acoustic control lamp switch 14, described closed container 1 is also provided with an air hole 4, described air hole 4 is plugged with a rubber stopper 3, described closed container 1 and small-sized water vat 6 are made by transparent plastic.
When concrete demonstration, first rubber stopper 3 is taken out from air hole 4, make to be full of air in closed container 1, now press the first horn switch 11, first acoustic control lamp switch 13 and the second acoustic control lamp switch 14, the first loudspeaker 8 are made to start to sound, first acoustic control lamp 13 is connected with power supply with the second acoustic control lamp 14, now, owing to being full of air in closed container 1, thus the sound that sends of the first loudspeaker 8 is after water transmission, arrive the first acoustic control lamp 5 place, thus start the first acoustic control lamp 5, make the first acoustic control lamp 5 luminous, enter in the air in closed container 1 after the sound water-borne transmission that other first loudspeaker 8 send again, finally arrive the second acoustic control lamp 2 place, start the second acoustic control lamp 2, make the second acoustic control lamp 2 luminous.
Above-mentioned presentation process can confirm, the sound that the first loudspeaker 8 send, and all can propagate in water He in air.
In like manner, closed by the first horn switch 11, start the second horn switch 12, the second loudspeaker 9 are sounded, the first acoustic control lamp 5 and the second acoustic control lamp 2 still can send light.
Rubber stopper 3 is filled in air hole 4, closed container 1 is made to be in air-tight state, then with air pump 10, the air in closed container 1 is taken away, closed container 1 is kept to be vacuum state, then the first horn switch 11 is pressed, first acoustic control lamp switch 13 and the second acoustic control lamp switch 14, the first loudspeaker 8 are made to start to sound, first acoustic control lamp 5 is connected with power supply with the second acoustic control lamp 2, now, because closed container 1 is in vacuum state, the sound that first loudspeaker 8 send can only at water transmission, thus the first acoustic control lamp 5 is luminous, and the second acoustic control lamp 2 is not owing to receiving sound, thus OFF state is in.
Closed by first horn switch 11, open the second horn switch 12, allow the second loudspeaker 9 sound, because sound can not be propagated in a vacuum, now, the first acoustic control lamp 5 and the second acoustic control lamp 2 are all in OFF state.
By above flow of presentation, can show under vacuum conditions to students intuitively, air can not be propagated, other media except vacuum, comprise gas and liquid, all can propagate sound, thus the understanding of student to sound propagation properties can be deepened, contribute to this knowledge point of student's grasp skilled fast.
Claims (2)
1. a physics teaching sound propagation demonstrator, it is characterized in that: comprise a closed container (1), a small-sized water vat (6) is provided with in described closed container (1), the interior filled with water of described small-sized water vat (6) (7), the first loudspeaker (8) and the first acoustic control lamp (5) is provided with in described small-sized water vat (6), the second loudspeaker (9) and the second acoustic control lamp (2) is provided with in described closed container (1), described closed container (1) is connected with an air pump (10), the outer wall of described closed container (1) is provided with the first horn switch (11), second horn switch (12), first acoustic control lamp switch (13) and the second acoustic control lamp switch (14), described closed container (1) is also provided with an air hole (4), described air hole (4) is plugged with a rubber stopper (3).
2. physics teaching sound propagation demonstrator according to claim 1, is characterized in that: described closed container (1) and small-sized water vat (6) are made by transparent plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520267090.0U CN204614309U (en) | 2015-04-25 | 2015-04-25 | A kind of physics teaching sound propagation demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520267090.0U CN204614309U (en) | 2015-04-25 | 2015-04-25 | A kind of physics teaching sound propagation demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204614309U true CN204614309U (en) | 2015-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520267090.0U Expired - Fee Related CN204614309U (en) | 2015-04-25 | 2015-04-25 | A kind of physics teaching sound propagation demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204614309U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107067904A (en) * | 2017-05-09 | 2017-08-18 | 成都新邦教育咨询有限公司 | A set of demonstration air can transaudient and vacuum can not be transaudient experimental provision |
| CN107967849A (en) * | 2017-12-18 | 2018-04-27 | 李志忠 | One kind visualization, digital display type sound propagation demonstrator |
-
2015
- 2015-04-25 CN CN201520267090.0U patent/CN204614309U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107067904A (en) * | 2017-05-09 | 2017-08-18 | 成都新邦教育咨询有限公司 | A set of demonstration air can transaudient and vacuum can not be transaudient experimental provision |
| CN107967849A (en) * | 2017-12-18 | 2018-04-27 | 李志忠 | One kind visualization, digital display type sound propagation demonstrator |
| CN107967849B (en) * | 2017-12-18 | 2020-02-07 | 李志忠 | Visual digital display type sound propagation demonstrator |
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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: 20150902 Termination date: 20160425 |