CN108205953A - A kind of acoustic wave energy demenstration method - Google Patents
A kind of acoustic wave energy demenstration method Download PDFInfo
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- CN108205953A CN108205953A CN201810252091.6A CN201810252091A CN108205953A CN 108205953 A CN108205953 A CN 108205953A CN 201810252091 A CN201810252091 A CN 201810252091A CN 108205953 A CN108205953 A CN 108205953A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000003139 buffering effect Effects 0.000 claims abstract description 15
- 210000003454 tympanic membrane Anatomy 0.000 claims abstract description 11
- 208000002925 dental caries Diseases 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 36
- 229910052802 copper Inorganic materials 0.000 claims description 36
- 239000010949 copper Substances 0.000 claims description 36
- 239000003792 electrolyte Substances 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 8
- 210000003128 head Anatomy 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 7
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 238000013022 venting Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000009527 percussion Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 2
- 239000002356 single layer Substances 0.000 claims 1
- 239000002352 surface water Substances 0.000 claims 1
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- UGWKCNDTYUOTQZ-UHFFFAOYSA-N copper;sulfuric acid Chemical compound [Cu].OS(O)(=O)=O UGWKCNDTYUOTQZ-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/14—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for acoustics
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- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Algebra (AREA)
- Business, Economics & Management (AREA)
- Acoustics & Sound (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Stringed Musical Instruments (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The present invention relates to physics teaching field, specifically a kind of acoustic wave energy demenstration method, this method includes two cavitys, and buffering eardrum is set between two cavitys, sonic generator is placed in the cavity on right side；A candle lighted is placed in the cavity in left side；A cup that water is housed is placed at candle rear, the first reflective mirror is placed in cup；The second speculum is placed at the rear of cup, video boards are placed in the top of the second speculum；Sonic generator causes air vibration, air driven buffering vibrophone, and buffering eardrum drives the flame of candle to shake, and the candle flame of shaking is incident upon by light reflection process on video boards；The peak for the flame being presented on video boards is recorded on video boards by experimenter.By the variation of the candle flame beside the observation of active sounding in the environment that the present invention is more closed at one, and pass through the behavior of one group of plane mirror amplification flame variation, make teaching more vivid.
Description
Technical field
The present invention relates to physics teaching field, specifically a kind of acoustic wave energy demenstration method.
Background technology
It is well known that sound is the sound wave generated by object vibration.It is simultaneously can by medium air or solid, liquid transmissive
The wave phenomenon perceived by human or animal hearing organ.Sound vibrates vibration transmission in the form of wave.Sound is that sound wave passes through
Any substance propagates the movement to be formed, and in the building up of our knowledge, it is known that sound has energy.In order to incite somebody to action
The conclusion imparts to the next generation, and principle is allowed to seem simple and clear, needs a simple demonstration teaching aid.
Invention content
For the problems of the prior art, the present invention provides a kind of acoustic wave energy demenstration methods, are more closed at one
Environment in by active sounding observation side candle flame variation, and pass through one group plane mirror amplification flame row
To make teaching more vivid.
The technical solution adopted by the present invention to solve the technical problems is：A kind of acoustic wave energy demonstration side of the present invention
Method, this method include the following steps：
Step 1 sets two cavitys in left and right, buffering eardrum is set between two cavitys, sonic generator is placed on the right side
In the cavity of side, and the cavities seals on right side；
Step 2 on the basis of step 1, places a candle lighted in the cavity in left side, and candle is located at buffering
The front end of eardrum；
Step 3, the candle rear in step 2 place a cup that water is housed, a minute surface court are placed in cup
On the first reflective mirror, the first reflective mirror swum on the water surface；
Step 4 is placed second speculum at the rear of the cup of step 3, is placed in the top of the second speculum
One video boards can realize the light for generating candle by the second speculum in the first reflective mirror in step 3 and this step
In line projection to video boards；
Step 5 on the basis of step 4, starts sonic generator, sonic generator right side in step 1 is caused
Air vibration in cavity, the buffering vibrophone in the air driven step 2 of vibration, buffering eardrum drive the candle on side
Flame shake, the candle flame of shaking by the light reflection process in step 4 by projection on video boards；
The peak of flame to being presented in step 5 on video boards is recorded in video boards by step 6, experimenter
On；
Step 7 changes the frequency or amplitude of sonic generator, repeats the above steps five and six, can study different frequency
With the energy variation of amplitude；
This method using sound wave apparatus for demonstrating realize, the sound wave apparatus for demonstrating include sounding box, displaying case, buffer and
Damping pad；The sounding box is arranged on the right side of displaying case；The buffer is arranged between sounding box and displaying case；Institute
The damping pad stated is arranged below sounding box and displaying case.
The displaying case includes box body, candle, water-reflected device, lateral plane mirror and video boards；The box body
In cube shaped, the right side of the box body couples with sounding box and the face is single-glass, which can avoid sounding box
The air flowing that interior part movement generates impacts candle in displaying case, and the top surface of box body is transparent removable cover, can be kept away
Exempt from the flame of outside air flowing disturbance candle, moreover it is possible to the light of blocking candle be avoided to propagate, and remaining four face of box body are equal
For double glazing material；The candle is arranged on bottom right in box body；The water-reflected device is box-like in opening,
Water is loaded in water-reflected device, is provided with bottom plane mirror in water-reflected device, the water surface in water-reflected device exists
It can also be fluctuated under the influence of acoustic energy, so as to be also exaggerated to acoustic wave energy；The top of the bottom plane mirror
Face is mirror surface, and foam is provided on bottom surface, and entire bottom plane mirror is swum on the water surface in water-reflected device；Institute
The lateral plane mirror stated is connected to by a raised hinged seat on the left side of box cavity, and box body left side is put down with lateral
The contour position of the top margin of face mirror and base is additionally provided with perforation, and both ends are respectively arranged with No.1 adjusting under lateral plane mirror upper end
Rope and No. two adjusting ropes；The No.1 adjusts rope and No. two adjusting ropes and is worn from two perforation up and down of box body left side respectively
Go out, adjust No.1 and adjust the rotational angle of rope or No. two adjusting rope adjustable sides to plane mirror, to adapt to the candle of different height；
The video boards are arranged on above box body right side.
The sounding box includes sound proofing enclosure, sounding disk, taps bar, resetting spring, fixed pulley, draught line and dynamics quarter
Spend line；For the sound proofing enclosure in cube shaped, left side is open and pass through buffer and couple with box body, sound proofing enclosure top
Portion is provided with through-hole；The sounding disk is by fiber suspension on the left of sound proofing enclosure inner cavity；The percussion bar is arranged on hair
It on the right side of audio disc, taps and is hinged on sound proofing enclosure inner wall at the top of bar, it is in spine shape to tap bar lowermost end；The resetting spring is set
It puts and is tapping on the right side of bar, resetting spring one end is connect with tapping in the middle part of bar, which is fixed on sound proofing enclosure
On inner wall；The fixed pulley is arranged on the right side of resetting spring；Described draught line one end is connect with tapping bar bottom end, draught line
The other end bypasses from fixed pulley and the outside for leading to sound proofing enclosure is passed through from through-hole, and be additionally provided with draw ring on the end；Institute
The graduation mark stated, which is arranged on, to be tapped below bar, and graduation mark is to tap the hinge joint at the top of bar as the arc-shaped arrangement in the center of circle, graduation mark
Can be that resetting spring storage power situation makes reference.
Further, the resetting spring in its natural state, taps bar and is not contacted with sounding disk, tap bar and sounding disk
After contact, resetting spring can quickly will hit against bar and retract, and so as to ensure the normal articulation of sounding disk, be conducive to improve drilling for experiment
Show effect.
Further, the sounding disk is made of two round copper sheets, and the thickness of copper sheets is one millimeter to two
Millimeter, the edge of copper sheets together, are ensured the leakproofness between two copper sheets, are conducive to carry by Welding
High demonstrating effect, and the edge of copper sheets be equipped with connecting hole, connecting hole run through two copper sheets, connecting hole not with two
The cavity connection formed between copper sheets, connecting hole connect with elastic connection rope, elastic connection rope by sounding disk be suspended in every
In sound shell, ensure the normal articulation of sounding disk；Adjuster is installed, adjuster is for two copper of adjusting in two copper sheets
Spacing between matter thin slice, so as to fulfill the adjusting of sounding disc thickness, available for studying the sounding disk of different-thickness for sound
Influence.
Further, the adjuster includes anode head, cathode taps and electrolyte water, the anode head and cathode taps difference
On two positions opposite mounted on sounding disk, electrolyte water is filled in sounding disk；The top of sounding disk is equipped with gas vent, exhaust
Venting plug in hole is installed, extension spring is installed in sounding disk, the both ends of extension spring are separately fixed at two copper sheets
On, extension spring is used to inwardly tighten two copper sheets.Anode head and cathode taps connect respectively with the anode of power supply and cathode
Connect, realize and the electrolyte water in sounding disk is electrolysed, be electrolysed the hydrogen of generation and oxygen may be such that two copper sheets to
Outer expansion so as to change the thickness of sounding disk, and ensures that the gross mass of sounding disk is constant.When sounding disk needs to restore to the original state,
Venting plug can be removed, discharge hydrogen and oxygen together in outdoor, two copper sheets reset under the action of extension spring.
Preferably, electrolyte water uses sulfuric acid copper electrolyte water, copper sheets can be avoided to corrode.
The beneficial effects of the invention are as follows：
A kind of acoustic wave energy demenstration method of 1 present invention, is observed in the environment that one is more closed by active sounding
The variation of the candle flame on side, and pass through the behavior of one group of plane mirror amplification flame variation, make teaching more vivid；
A kind of acoustic wave energy demenstration method of 2 present invention, the right side of box body couples with sounding box and the face is individual layer glass
Glass, the single-glass can avoid the air flowing that part movement generates in sounding box from impacting candle in displaying case；
A kind of acoustic wave energy demenstration methods of 3 present invention, the water surface in water-reflected device is under the influence of acoustic energy
Also it can fluctuate, so as to be also exaggerated to acoustic wave energy, coordinate the variation of candle flame, change hot spot on video boards
It is more obvious；
A kind of acoustic wave energy demenstration method of 4 present invention, is provided with buffer between sounding box and displaying case, can avoid grasping
Microvibration caused by it is transmitted to by the outer wall of sound proofing enclosure on box body when making sounding box sounding, is avoided to wax in box body
Candle variation impacts；
A kind of acoustic wave energy demenstration methods of 5 present invention, the shell of sounding box are sound proofing enclosure, sound can be avoided excessive and
Influence demonstrator.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the structure diagram of the present invention；
In figure：Sounding box 1, displaying case 2, buffer 3, damping pad 4, sound proofing enclosure 11, sounding disk 12, tap bar 13,
Resetting spring 14, draught line 16, dynamics graduation mark 17, box body 21, candle 22, water-reflected device 23, is laterally put down at fixed pulley 15
Face mirror 24, video boards 25, through-hole 111, bottom plane mirror 231, No.1 adjust 241, No. two adjusting ropes 242 of rope.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained.
As shown in Figure 1, a kind of acoustic wave energy demenstration method of the present invention, this method include the following steps：
Step 1 sets two cavitys in left and right, buffering eardrum is set between two cavitys, sonic generator is placed on the right side
In the cavity of side, and the cavities seals on right side；
Step 2 on the basis of step 1, places a candle lighted in the cavity in left side, and candle is located at buffering
The front end of eardrum；
Step 3, the candle rear in step 2 place a cup that water is housed, a minute surface court are placed in cup
On the first reflective mirror, the first reflective mirror swum on the water surface；
Step 4 is placed second speculum at the rear of the cup of step 3, is placed in the top of the second speculum
One video boards can realize the light for generating candle by the second speculum in the first reflective mirror in step 3 and this step
In line projection to video boards；
Step 5 on the basis of step 4, starts sonic generator, sonic generator right side in step 1 is caused
Air vibration in cavity, the buffering vibrophone in the air driven step 2 of vibration, buffering eardrum drive the candle on side
Flame shake, the candle flame of shaking by the light reflection process in step 4 by projection on video boards；
The peak of flame to being presented in step 5 on video boards is recorded in video boards by step 6, experimenter
On；
Step 7 changes the frequency or amplitude of sonic generator, repeats the above steps five and six, can study different frequency
With the energy variation of amplitude；
This method realizes that the sound wave apparatus for demonstrating includes sounding box 1, displaying case 2, buffer using sound wave apparatus for demonstrating
3 and damping pad 4；The sounding box 1 is arranged on 2 right side of displaying case；The buffer 3 is arranged on sounding box 1 and displaying
Between box 2；The damping pad 4 is arranged on 2 lower section of sounding box 1 and displaying case.
The displaying case 2 includes box body 21, candle 22, water-reflected device 23, lateral plane mirror 24 and video boards 25；
The box body 21 is in cube shaped, and the right side of the box body 21 couples with sounding box 1 and the face is single-glass, the individual layer glass
Glass can avoid the air flowing that part movement generates in sounding box 1 from impacting candle 22 in displaying case 2, the top surface of box body 21
For transparent removable cover, the flame of outside air flowing disturbance candle 22 can be avoided, moreover it is possible to the light of blocking candle is avoided to propagate,
And remaining four face of box body 21 are double glazing material；The candle 22 is arranged on bottom right in box body 21；It is described
Water-reflected device 23 in open box-like, water is loaded in water-reflected device 23, is provided in water-reflected device 23
Bottom plane mirror 231, the water surface in water-reflected device 23 can also fluctuate under the influence of acoustic energy, so as to sound wave
Energy is also exaggerated；The top surface of the bottom plane mirror 231 is mirror surface, is provided with foam on bottom surface, entirely
Bottom plane mirror 231 is swum on the water surface in water-reflected device 23；The lateral plane mirror 24 is raised by one
Hinged seat is connected on the left side of 21 inner cavity of box body, and 21 left side of box body and the top margin of lateral plane mirror 24 and base are contour
Position is additionally provided with perforation, and both ends are respectively arranged with No.1 adjusting rope 241 and No. two adjusting ropes under 24 upper end of lateral plane mirror
242；The No.1 adjusts rope 241 and No. two adjusting ropes 242 and is pierced by from two perforation up and down of 21 left side of box body respectively,
It adjusts No.1 and adjusts the rotational angle of rope 241 or No. two 242 adjustable sides of adjusting rope to plane mirror 24, to adapt to different height
Candle；The video boards 25 are arranged on above 21 right side of box body.
The sounding box 1 includes sound proofing enclosure 11, sounding disk 12, taps bar 13, resetting spring 14, fixed pulley 15, leads
Lead 16 and dynamics graduation mark 17；The sound proofing enclosure 11 in cube shaped, left side for it is open and pass through buffer 3 with
Box body 21 couples, and 11 top of sound proofing enclosure is provided with through-hole 111；The sounding disk 12 is by fiber suspension in sound proofing enclosure 11
On the left of inner cavity；The percussion bar 13 is arranged on 12 right side of sounding disk, taps 13 top of bar and is hinged on 11 inner wall of sound proofing enclosure,
It is in spine shape to tap 13 lowermost end of bar；The resetting spring 14, which is arranged on, taps 13 right side of bar, and 14 one end of resetting spring is with striking
It hits 13 middle part of bar to connect, which is fixed on the inner wall of sound proofing enclosure 11；The fixed pulley 15 is set
On 14 right side of resetting spring；Described 16 one end of draught line is connect with tapping bar 13 bottom end, and 16 other end of draught line is from fixed pulley
It is bypassed on 15 and the outside for leading to sound proofing enclosure 11 is passed through from through-hole 111, and draw ring is additionally provided on the end；The scale
Line 17, which is arranged on, taps 13 lower section of bar, and graduation mark 17 is to tap the hinge joint at 13 top of bar as the arc-shaped arrangement in the center of circle, graduation mark
17 can be that the storage power situation of resetting spring 14 makes reference.
Further, the resetting spring 14 in its natural state, taps bar 13 and is not contacted with sounding disk 12, tap bar 13
After being contacted with sounding disk 12, resetting spring 14 can quickly will hit against bar 13 and retract, and so as to ensure the normal articulation of sounding disk 12, have
Conducive to the demonstrating effect for improving experiment.
Further, the sounding disk 12 is made of two round copper sheets, the thickness of copper sheets for one millimeter extremely
Two millimeters, the edge of copper sheets together, is ensured the leakproofness between two copper sheets, is conducive to by Welding
Demonstrating effect is improved, and the edge of copper sheets is equipped with connecting hole, connecting hole runs through two copper sheets, and connecting hole is not with two
The cavity connection formed between a copper sheets, connecting hole are connect with elastic connection rope, and elastic connection rope suspends sounding disk 12 in midair
In sound proofing enclosure 11, ensure the normal articulation of sounding disk 12；Adjuster is installed, adjuster is used to adjust in two copper sheets
The spacing between two copper sheets is saved, so as to fulfill the adjusting of 12 thickness of sounding disk, available for studying the sounding of different-thickness
Influence of the disk 12 for sound.
Further, the adjuster includes anode head, cathode taps and electrolyte water, the anode head and cathode taps difference
On two positions opposite mounted on sounding disk 12, electrolyte water is filled in sounding disk 12；The top of sounding disk 12 is equipped with exhaust
Hole is equipped with venting plug in gas vent, extension spring is equipped in sounding disk 12, the both ends of extension spring are separately fixed at two
In copper sheets, extension spring is used to inwardly tighten two copper sheets.Anode head and cathode taps respectively with the anode of power supply
It is connected with cathode, realizes and the electrolyte water in sounding disk 12 is electrolysed, be electrolysed the hydrogen of generation and oxygen may be such that two
Copper sheets expand outward, so as to change the thickness of sounding disk 12, and ensure that the gross mass of sounding disk 12 is constant.When sounding disk 12
When needing to restore to the original state, venting plug can be removed, discharge hydrogen and oxygen together in outdoor, two copper sheets are stretching bullet
It is resetted under the action of spring.Preferably, electrolyte water uses sulfuric acid copper electrolyte water, copper sheets can be avoided to corrode.
A kind of acoustic wave energy demenstration method of the present embodiment when in use, before use, adjusts the thickness of sounding disk 12 first
Then degree, sound proofing enclosure 11 is pinned with hand, pull draught line 16, and draught line 16, which pulls, taps bar 13, the rotation of bar 13 one to be tapped
After determining angle, draught line 16 is unclamped, bar 13 is tapped and beats sounding disk 12, sound is simultaneously transmitted to displaying case 2 by 12 sounding of sounding disk
It is interior, the water surface in candle flame and the water-reflected device 23 in displaying case 2 is caused to have and is slightly shaken；Due to displaying case 2
The light of interior candle flame is reflected into through water-reflected device 23 on lateral plane mirror 24, and is reflected by lateral plane mirror 24 aobvious
As on plate 25, in sounding 1 sounding of box, the candle hot spot that is reflected on video boards 25, which has, slightly to be shaken, so as to learn
Candle flame is shaken, and then drills the characteristic for showing that sound has energy.Multigroup reality is carried out by the thickness for changing sounding disk 12
It tests, and records the peak of candle flame in experiment, influence of the thickness to sound wave of sounding disk 12 can be studied.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the description in the above embodiment and specification only illustrates the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement is both fallen in the scope of protection of present invention.The claimed scope of the invention is by appended claims and its equivalent
Object defines.
Claims (5)
1. a kind of acoustic wave energy demenstration method, which is characterized in that this method includes the following steps：
Step 1 sets two cavitys in left and right, buffering eardrum is set between two cavitys, sonic generator is placed on right side
In cavity, and the cavities seals on right side；
Step 2 on the basis of step 1, places a candle lighted in the cavity in left side, and candle is located at buffering eardrum
Front end；
Step 3, candle rear in step 2 place a cup that water is housed, and a minute surface is placed in cup upward
First reflective mirror, the first reflective mirror are swum on the water surface；
Step 4 places second speculum at the rear of the cup of step 3, one is placed in the top of the second speculum
Video boards can realize that the light for generating candle is thrown by the second speculum in the first reflective mirror in step 3 and this step
On shadow to video boards；
Step 5 on the basis of step 4, starts sonic generator, the cavity on sonic generator right side in step 1 is caused
Interior air vibration, the buffering vibrophone in the air driven step 2 of vibration, buffering eardrum drive the fire of the candle on side
Flame shakes, the candle flame of shaking by the light reflection process in step 4 by projection on video boards；
The peak of flame to being presented in step 5 on video boards is recorded on video boards by step 6, experimenter；
Step 7 changes the frequency or amplitude of sonic generator, repeats the above steps five and six, can study different frequency and shake
The energy variation of width；
This method realizes that the sound wave apparatus for demonstrating includes sounding box (1), displaying case (2), buffer using sound wave apparatus for demonstrating
(3) and damping pad (4)；The sounding box (1) is arranged on the right side of displaying case (2)；The buffer (3) is arranged on sounding
Between box (1) and displaying case (2)；The damping pad (4) is arranged below sounding box (1) and displaying case (2)；
The displaying case (2) is including box body (21), candle (22), water-reflected device (23), lateral plane mirror (24) and shows
As plate (25)；The box body (21) is in cube shaped, and the right side of the box body (21) couples with sounding box (1) and the face is single
Layer glass, the top surface of box body (21) is transparent removable cover, and remaining four face of box body (21) are double glazing material；Institute
The candle (22) stated is arranged on box body (21) interior bottom right；The water-reflected device (23) is in open box-like, the water surface
Water is loaded in reflection unit (23), bottom plane mirror (231) is provided in water-reflected device (23)；The bottom plane
The top surface of mirror (231) is mirror surface, is provided with foam on bottom surface, entire bottom plane mirror (231) swims in water-reflected
On the water surface in device (23)；The lateral plane mirror (24) is connected to box body (21) inner cavity by a raised hinged seat
Left side on, the contour position of the top margin of box body (21) left side and lateral plane mirror (24) and base is additionally provided with perforation,
Both ends are respectively arranged with No.1 and adjust rope (241) and No. two adjusting ropes (242) under lateral plane mirror (24) upper end；The No.1
Rope (241) and No. two adjusting ropes (242) are adjusted to be pierced by from two perforation up and down of box body (21) left side respectively；Described is aobvious
As plate (25) is arranged on above box body (21) right side.
2. a kind of acoustic wave energy demenstration method according to claim 1, it is characterised in that：The sounding box (1) includes
Sound proofing enclosure (11), sounding disk (12) tap bar (13), resetting spring (14), fixed pulley (15), draught line (16) and dynamics quarter
Spend line (17)；For the sound proofing enclosure (11) in cube shaped, left side is open and pass through buffer (3) and box body (21)
Connection, sound proofing enclosure (11) top are provided with through-hole (111)；The sounding disk (12) is by fiber suspension in sound proofing enclosure
(11) on the left of inner cavity；The percussion bar (13) is arranged on the right side of sounding disk (12), is tapped and is hinged on outside sound insulation at the top of bar (13)
On shell (11) inner wall, it is in spine shape to tap bar (13) lowermost end；The resetting spring (14), which is arranged on, to be tapped on the right side of bar (13),
Resetting spring (14) one end is connect with tapping in the middle part of bar (13), which is fixed on sound proofing enclosure (11)
On inner wall；The fixed pulley (15) is arranged on the right side of resetting spring (14)；Described draught line (16) one end is with tapping bar
(13) bottom end connects, and draught line (16) other end, which is bypassed from fixed pulley (15) and passed through from through-hole (111), to lead to outside sound insulation
The outside of shell (11), and it is additionally provided with draw ring on the end；The graduation mark (17), which is arranged on, to be tapped below bar (13), graduation mark
(17) to tap the hinge joint at the top of bar (13) as the arc-shaped arrangement in the center of circle.
3. a kind of acoustic wave energy demenstration method according to claim 2, it is characterised in that：The resetting spring (14) is certainly
Under right state, tap bar (13) and do not contacted with sounding disk (12).
4. a kind of acoustic wave energy demenstration method according to claim 2, it is characterised in that：The sounding disk (12) is by two
Round copper sheets are made, and the thickness of copper sheets is one millimeter to two millimeters, and the edge of copper sheets passes through Welding
Together, and the edge of copper sheets is equipped with connecting hole, and connecting hole connect with elastic connection rope, and elastic connection rope is by sounding disk
(12) it is suspended in sound proofing enclosure (11)；Adjuster is installed, adjuster is two copper thin for adjusting in two copper sheets
Spacing between piece, so as to fulfill the adjusting of sounding disk (12) thickness.
5. a kind of acoustic wave energy demenstration method according to claim 4, it is characterised in that：The adjuster includes anode
Head, cathode taps and electrolyte water, the anode head and cathode taps are separately mounted on two opposite positions of sounding disk (12), hair
Electrolyte water is filled in audio disc (12)；The top of sounding disk (12) is equipped with gas vent, and venting plug, sounding disk are equipped in gas vent
(12) extension spring is installed in, the both ends of extension spring are separately fixed in two copper sheets, and extension spring is used for two
A copper sheets are inwardly tightened.
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| CN114141112A (en) * | 2021-12-11 | 2022-03-04 | 复旦大学 | Ultrasonic pressure visual demonstration instrument |
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