CN102236995A - Sound wave visual demonstration system and sound wave demonstration method thereof - Google Patents
Sound wave visual demonstration system and sound wave demonstration method thereof Download PDFInfo
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- CN102236995A CN102236995A CN2010101648371A CN201010164837A CN102236995A CN 102236995 A CN102236995 A CN 102236995A CN 2010101648371 A CN2010101648371 A CN 2010101648371A CN 201010164837 A CN201010164837 A CN 201010164837A CN 102236995 A CN102236995 A CN 102236995A
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Abstract
The invention relates to a sound wave visual demonstration system and a sound wave demonstration method thereof. The sound wave visual demonstration system is characterized by comprising a demonstration platform, a sound production demonstration mechanism and a functional control button, wherein the sound production demonstration mechanism is arranged on the demonstration platform; the functional control button is arranged on the demonstration platform and is connected with the sound production demonstration mechanism; the sound production demonstration mechanism comprises a loudspeaker model, a vibration diaphragm, a prism, a laser beam generator and a curved screen; a speaker is arranged in the loudspeaker model; the vibration diaphragm is arranged on the front side of the speaker; the laser beam generator is arranged on the front side of the vibration diaphragm; a laser beam emitted from the laser beam generator is aligned with the vibration diaphragm; and the prism is arranged on a light path of a laser beam reflected by the vibration diaphragm and is opposite to the curved screen. When the system is used for demonstrating, the speaker is used as a sound source, the laser beam generator is used for emitting laser beams, the vibration diaphragm is used for changing a transverse wave into a longitudinal wave, and the prism is used for uniformly showing the longitudinal wave which is reflected by the laser beams through a thin film onto the curved screen. Thus, invisible sound waves can be converted into visible wave forms by electronic and optical principles.
Description
Technical field
The present invention relates to visual demo system of a kind of sound wave and sound wave demenstration method thereof.
Background technology
Sound wave is the mode of propagation of sound, is a kind of mechanical wave, is produced by object (sound source) vibration.The vibration of sound wave form with density interphase in air is to all the winds propagated.When propagating in gas and liquid medium is a kind of compressional wave, and this communication process is the transmittance process of energy, and the transmission of quality does not take place.The frequency of the sound wave that people's ear can be heard is generally between 20 hertz to 20000 hertz.Does but how sound wave produce? existing teaching adopts spring vibration as laboratory facilities substantially, by listening the sound of spring vibration, imagines the propagation of sound wave.Because can not manifest the waveform of sound wave intuitively, so student's indigestion.
Summary of the invention
The present invention is for visual demo system of a kind of sound wave and sound wave demenstration method thereof are provided to people, by this apparatus for demonstrating, can observe the waveform of sound wave very intuitively, thus the reason that the correct understanding sound wave is propagated with the form of dilatational wave in air and the air molecule that vibrates in communication process does not move forward with sound wave.
To achieve these goals, the technical solution used in the present invention is: the visual demo system of sound wave, be characterized in, comprise a Demonstration table, be arranged on the sounding demonstration mechanism on the Demonstration table and be arranged on the function control knob that is connected with sounding demonstration mechanism on the described Demonstration table; Described sounding is demonstrated mechanism and is comprised a loudspeaker model, a vibrating diaphragm, a prism, a laser beam generator, an arc screen; Wherein: be provided with loudspeaker in the described loudspeaker model; Described vibrating diaphragm is arranged on the place ahead of loudspeaker, and described laser beam generator is arranged on vibrating diaphragm the place ahead, and the laser beam that this laser beam generator sends is aimed at described vibrating diaphragm; Described prism and arc screen sequence interval are arranged on the side of described laser beam generator.
The visual demo system of above-mentioned sound wave wherein, also comprises a prism rotating mechanism, and described prism rotating mechanism is connected with prism.
The visual demo system of above-mentioned sound wave, wherein, described prism rotating mechanism mainly is made of motor, and the output shaft of described motor is connected with prism.
The visual demo system of above-mentioned sound wave, wherein, described prism rotating mechanism is at the uniform velocity to rotate.
The visual demo system of above-mentioned sound wave, wherein, described prism is a prism.
The visual demo system of above-mentioned sound wave, wherein, described arc screen is a metal pad pasting screen.
Adopt the method for the visual demo system demonstration of above-mentioned sound wave sound wave, wherein, may further comprise the steps:
A, sounding demonstration mechanism is being set on the Demonstration table and is being arranged on the function control knob that is connected with sounding demonstration mechanism on the described Demonstration table; Described sounding is demonstrated mechanism and is comprised a loudspeaker model, a vibrating diaphragm, a prism, a laser beam generator, an arc screen; Wherein: be provided with loudspeaker in the described loudspeaker model; Described vibrating diaphragm is arranged on the place ahead of loudspeaker, and described laser beam generator is arranged on vibrating diaphragm the place ahead, and the laser beam that this laser beam generator sends is aimed at described vibrating diaphragm; Described prism is arranged on the light path of vibrating diaphragm reflection lasering beam, and this prism is relative with described arc screen;
The laser beam that b, laser beam generator send is aimed at the vibrating diaphragm before the loudspeaker model;
The sound that loudspeaker sends in c, the loudspeaker model causes the vibration of vibrating diaphragm; Irregular waveform appears in the male and fomale(M﹠F) laser light reflected bundle by vibrating diaphragm, and this irregular longitudinal type ripple is projected onto on the arc screen through the refraction of the prism of rotation, forms the constantly continuous acoustic waveform figure of change.
Because the present invention has adopted above technical scheme, adopt loudspeaker as sound source, the laser beam generator emission of lasering beam, vibrating diaphragm becomes shear wave into compressional wave, and prism is presented in laser beam on the arc curtain equably by the compressional wave that film reflects back.Thereby by electricity and optical principle, invisible sound wave is become can observable oscillogram.
Description of drawings
Concrete structure of the present invention is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the structural front view of a kind of embodiment of the visual demo system of sound wave of the present invention.
Fig. 2 is the left view (part is analysed and observe) of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Embodiment
See also Fig. 1～Fig. 3.The visual demo system of sound wave of the present invention comprises a Demonstration table 1, is arranged on the sounding demonstration mechanism 2 on the Demonstration table and is arranged on the function control knob 3 that is connected with sounding demonstration mechanism on the described Demonstration table.Described Demonstration table 1 comprises table top 11, casing 12.Described sounding is demonstrated mechanism 2 and is arranged on the table top 11, and this sounding demonstration mechanism 2 comprises a loudspeaker model 21, a vibrating diaphragm 22, a prism 23, a laser beam generator 24, an arc screen 25.Described loudspeaker model 21 is arranged on the table top 11 by support 211, is provided with loudspeaker 212 in this loudspeaker model.Described vibrating diaphragm 22 is arranged on the table top 11 by support 221, and this vibrating diaphragm 22 is positioned at the dead ahead of loudspeaker 212.Described prism 23 and laser beam generator 24 support 231,241 by separately respectively are arranged on the table top 11, all are arranged on vibrating diaphragm 22 the place aheads, and the laser beam that this laser beam generator sends aims at described vibrating diaphragm, and this light path is shown in a among Fig. 3.Arc screen 25 described in the present embodiment is a metal pad pasting screen, is arranged on the table top 11 by support 251.Described prism is a prism, and this prism is arranged on the light path b of vibrating diaphragm reflection lasering beam, and is relative with described arc screen 25, and through the refraction of prism, waveform is projected onto on the arc screen by light path c.
In the visual demo system of described sound wave, also comprise a prism rotating mechanism 26, described prism rotating mechanism mainly is made of motor, and the output shaft of described motor is connected with prism, makes described prism do at the uniform velocity rotation.
Described function control knob 3 is arranged on the operational zone of table top, and it comprises power switch button 31, loudspeaker start button 32 and prism rotary knob 33.
The method that the present invention demonstrates sound wave is: settle one as above-mentioned sounding demonstration mechanism and function control knob on Demonstration table, the participant starts the function control knob, loudspeaker is sounded in the loudspeaker model of this sounding demonstration mechanism, cause the vibration of vibrating diaphragm, laser beam is opened and is aimed at the preceding vibrating diaphragm of loudspeaker model simultaneously.The vibrating diaphragm vibration time has a male and fomale(M﹠F), and the male and fomale(M﹠F) laser light reflected bundle by vibrating diaphragm just irregular waveform can occur, and this irregular longitudinal type ripple is projected onto on the arc screen through the refraction of prism.The prism rotating mechanism is installed below the prism, makes prism be in the uniform rotation state always.Irregular longitudinal type ripple is through the refraction and the rotation of prism, and quilt is thrown equably and is sprinkled upon on the arc screen.Because people's eyes have of short duration vision to stop the reason of (being about between 0.1 to 0.2 second), therefore, laser beam formation during this period of time and the oscillogram that displays by optical principle all can be by visual memories.Be accompanied by the of flowing rhythm of music that loudspeaker sends, the participant can see the continuous oscillogram of the continuous change that occurs on the arc screen clearly, equals personally the waveform of " seeing " sound wave, and one of waveform of demonstration is shown in the A among Fig. 1.Thereby know that sound is by object vibration produces, sound can be propagated and sound wave is to all the winds propagated with the form of dilatational wave reason in air in air.
Claims (7)
1. the visual demo system of sound wave is characterized in that, comprises a Demonstration table, is arranged on the sounding demonstration mechanism on the Demonstration table and is arranged on the function control knob that is connected with sounding demonstration mechanism on the described Demonstration table; Described sounding is demonstrated mechanism and is comprised a loudspeaker model, a vibrating diaphragm, a prism, a laser beam generator, an arc screen; Wherein: be provided with loudspeaker in the described loudspeaker model; Described vibrating diaphragm is arranged on the place ahead of loudspeaker, and described laser beam generator is arranged on vibrating diaphragm the place ahead, and the laser beam that this laser beam generator sends is aimed at described vibrating diaphragm; Described prism is arranged on the light path of vibrating diaphragm reflection lasering beam, and this prism is relative with described arc screen.
2. the visual demo system of sound wave according to claim 1 is characterized in that, also comprises a prism rotating mechanism, and described prism rotating mechanism is connected with prism.
3. the visual demo system of sound wave according to claim 2 is characterized in that described prism rotating mechanism mainly is made of motor, and the output shaft of described motor is connected with prism.
4. according to claim 2 or the visual demo system of 3 described sound waves, it is characterized in that described prism rotating mechanism is at the uniform velocity to rotate.
5. the visual demo system of sound wave according to claim 1 is characterized in that described prism is a prism.
6. the visual demo system of sound wave according to claim 1 is characterized in that, described arc screen is a metal pad pasting screen.
7. adopt the method for the visual demo system demonstration of the described sound wave of claim 1～6 sound wave, it is characterized in that, may further comprise the steps:
A, sounding demonstration mechanism is being set on the Demonstration table and is being arranged on the function control knob that is connected with sounding demonstration mechanism on the described Demonstration table; Described sounding is demonstrated mechanism and is comprised a loudspeaker model, a vibrating diaphragm, a prism, a laser beam generator, an arc screen; Wherein: be provided with loudspeaker in the described loudspeaker model; Described vibrating diaphragm is arranged on the place ahead of loudspeaker, and described laser beam generator is arranged on vibrating diaphragm the place ahead, and the laser beam that this laser beam generator sends is aimed at described vibrating diaphragm; Described prism is arranged on the light path of vibrating diaphragm reflection lasering beam, and this prism is relative with described arc screen;
The laser beam that b, laser beam generator send is aimed at the vibrating diaphragm before the loudspeaker model;
The sound that loudspeaker sends in c, the loudspeaker model causes the vibration of vibrating diaphragm; Irregular waveform appears in the male and fomale(M﹠F) laser light reflected bundle by vibrating diaphragm, and this irregular longitudinal type ripple is projected onto on the arc screen through the refraction of the prism of rotation, forms the constantly continuous acoustic waveform figure of change.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010164837.1A CN102236995B (en) | 2010-04-29 | 2010-04-29 | Sound wave visual demonstration system and sound wave demonstration method thereof |
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| CN201010164837.1A CN102236995B (en) | 2010-04-29 | 2010-04-29 | Sound wave visual demonstration system and sound wave demonstration method thereof |
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| CN102236995B CN102236995B (en) | 2014-02-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104091500A (en) * | 2014-06-10 | 2014-10-08 | 李建荣 | Apparatus for comparing sound transmitting capabilities of objects |
| CN108831267A (en) * | 2018-09-12 | 2018-11-16 | 青海省科学技术馆（青海省青少年科技中心） | A kind of exhibition article for demonstrating loudspeaker principle |
| CN110428708A (en) * | 2019-07-23 | 2019-11-08 | 南开大学 | A kind of visual Lie groupoid apparatus for demonstrating of sound |
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| JP2004069471A (en) * | 2002-08-06 | 2004-03-04 | Wetmaster Kk | Method and device for sound source visualization |
| DE20308039U1 (en) * | 2003-05-05 | 2003-09-18 | Heckhausen Wolfgang | Optical display system for representation of sound waves and loudness of uproar in school classroom has microphone, vertical scale using LED's and red, green and yellow traffic light display |
| CN200983220Y (en) * | 2006-12-21 | 2007-11-28 | 吉众 | Sound wave demonstrator |
| CN201156325Y (en) * | 2008-01-11 | 2008-11-26 | 吴章印 | Sound generation demonstrator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104091500A (en) * | 2014-06-10 | 2014-10-08 | 李建荣 | Apparatus for comparing sound transmitting capabilities of objects |
| CN108831267A (en) * | 2018-09-12 | 2018-11-16 | 青海省科学技术馆（青海省青少年科技中心） | A kind of exhibition article for demonstrating loudspeaker principle |
| CN110428708A (en) * | 2019-07-23 | 2019-11-08 | 南开大学 | A kind of visual Lie groupoid apparatus for demonstrating of sound |
| CN110428708B (en) * | 2019-07-23 | 2021-04-09 | 南开大学 | Sound visualization Lissajous figure demonstration device |
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| CN102236995B (en) | 2014-02-05 |
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