CN203490876U - Demonstrator for demonstrating incapable sound spread in vacuum - Google Patents
Demonstrator for demonstrating incapable sound spread in vacuum Download PDFInfo
- Publication number
- CN203490876U CN203490876U CN201320637417.XU CN201320637417U CN203490876U CN 203490876 U CN203490876 U CN 203490876U CN 201320637417 U CN201320637417 U CN 201320637417U CN 203490876 U CN203490876 U CN 203490876U
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- barrel body
- vacuum
- staving
- demonstrator
- audio
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Abstract
The utility model discloses a demonstrator for demonstrating incapable sound spread in vacuum. The demonstrator comprises an inclosed barrel body, an injection syringe which is communicated with the barrel body and used to vacuate the barrel body, and an earphone. The earphone comprises earplugs, an audio cable and an auto plug; two ends of the audio cable are respectively connected with the earplugs and the audio plug, the earplugs are disposed in the barrel body, and the audio plug is disposed outside the barrel body; and the injection syringe comprises a piston, a piston rod and an exhaust pipe. The demonstrator is advantageous in that: (1) the structure is simple; (2) the barrel body is inclosed, the injection syringe is communicated with the barrel body, an exhaust hole is disposed on the injection syringe, and the vacuum extraction equipment is small and provides convenience for vacuating the barrel body, so an ideal experiment effect is guaranteed to be obtain; and (3) the audio plug is connected with audio equipment, and sound made by the earplugs in the barrel body is gradually reduced with an increase of the vacuum degree in the barrel body during the vacuating process, so a conclusion that sound cannot spread in vacuum is obtained by means of an experiment.
Description
Technical field
The utility model relates to a kind of physics teaching in secondary school demonstration device, particularly a kind of vacuum can not transaudient demonstration device.
Background technology
At present, at junior physics, give lessons in process, when lecturing sonic propagation, the lecture experiment that need to make a sound and can not propagate in a vacuum, existing demonstration equipment mainly comprises cloche, evacuator, alarm clock and rubber packing plug, because rubber packing plug is easily oxidized, the sealing effectiveness of cloche is not good, thereby cloche is difficult to be evacuated, add that again evacuator is comparatively heavy, so be difficult to obtain desirable experiment effect.
Summary of the invention
Problem to be solved in the utility model is: provide a kind of vacuum simple in structure, that experiment effect is desirable can not transaudient demonstration device.
In order to solve the problems of the technologies described above, vacuum of the present utility model can not transaudient demonstration device, comprise airtight staving, be connected with staving and for by the evacuated syringe of staving and earphone, described earphone comprises earplug, tone frequency channel wire and audio jack, the two ends of described tone frequency channel wire are connected with audio jack with earplug respectively, described earplug is placed in staving, and described audio jack is placed in outside staving, and described syringe comprises piston, piston rod and gas outlet.
The beneficial effect that the utility model is obtained is: (1) is simple in structure; (2) staving is airtight, and syringe is connected with staving, and syringe is provided with vent port, thereby vaccum-pumping equipment is small and exquisite and convenience is evacuated staving, thereby guarantees to obtain desirable experiment effect; (3) audio jack is connected with audio frequency apparatus, in the process vacuumizing, the sound that the earplug in staving sends reduces gradually along with the raising of vacuum tightness in entire body, thereby draws sound not contagious conclusion in a vacuum by the mode of experiment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1, audio jack, 2, tone frequency channel wire, 3, earplug, 4, staving, 5, gas outlet, 6, syringe, 7, piston rod, 8, piston.
Embodiment
As shown in Figure 1, vacuum of the present utility model can not transaudient demonstration device, comprise airtight staving 4, be connected with staving 4 and for by the evacuated syringe 6 of staving 4 and earphone, described earphone comprises earplug 3, tone frequency channel wire 2 and audio jack 1, the two ends of described tone frequency channel wire 2 are connected with audio jack 1 with earplug 3 respectively, described earplug 3 is placed in staving 4, and described audio jack 1 is placed in outside staving 4, and described syringe 6 comprises piston 8, piston rod 7 and gas outlet 5.
Vacuum of the present utility model can not transaudient demonstration device, and simple in structure, staving 4 is airtight, and syringe 6 is connected with staving, and syringe 6 is provided with vent port 5, thereby vaccum-pumping equipment is small and exquisite and convenient staving 4 is evacuated, thereby guarantees to obtain desirable experiment effect.
In the time of concrete demonstration, first audio jack 1 is connected with audio frequency apparatus, then continuous by the Bas Discharged in staving by syringe 6, in the process vacuumizing, the sound that earplug 3 in staving 4 sends reduces gradually along with the raising of entire body 4 interior vacuum tightnesss, thereby draws sound not contagious conclusion in a vacuum by the mode of experiment.
Claims (1)
1. a vacuum can not transaudient demonstration device, it is characterized in that: comprise airtight staving (4), be connected with staving (4) and for by the evacuated syringe of staving (4) (6) and earphone, described earphone comprises earplug (3), tone frequency channel wire (2) and audio jack (1), the two ends of described tone frequency channel wire (2) are connected with audio jack (1) with earplug (3) respectively, described earplug (3) is placed in staving (4), described audio jack (1) is placed in outside staving (4), described syringe (6) comprises piston (8), piston rod (7) and gas outlet (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320637417.XU CN203490876U (en) | 2013-10-15 | 2013-10-15 | Demonstrator for demonstrating incapable sound spread in vacuum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320637417.XU CN203490876U (en) | 2013-10-15 | 2013-10-15 | Demonstrator for demonstrating incapable sound spread in vacuum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203490876U true CN203490876U (en) | 2014-03-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320637417.XU Expired - Fee Related CN203490876U (en) | 2013-10-15 | 2013-10-15 | Demonstrator for demonstrating incapable sound spread in vacuum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203490876U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091499A (en) * | 2014-06-10 | 2014-10-08 | 李建荣 | Sound spreading demonstration device |
| CN110459080A (en) * | 2019-08-22 | 2019-11-15 | 深圳市俊达通办公智能科技有限公司 | It is a kind of that reading image training robot is listened for English teaching based on artificial intelligence |
-
2013
- 2013-10-15 CN CN201320637417.XU patent/CN203490876U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091499A (en) * | 2014-06-10 | 2014-10-08 | 李建荣 | Sound spreading demonstration device |
| CN110459080A (en) * | 2019-08-22 | 2019-11-15 | 深圳市俊达通办公智能科技有限公司 | It is a kind of that reading image training robot is listened for English teaching based on artificial intelligence |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20141015 |
|
| EXPY | Termination of patent right or utility model |