Sound propagation demonstration teaching aid

Abstract

The invention discloses a sound propagation demonstration teaching aid, which belongs to the technical field of teaching demonstration devices and comprises a base, a strut and a first threaded pipe are fixed at the top of the base through bolts. A bidirectional threaded rod is embedded in the center of the top of the first threaded pipe. A rubber sheet which is not provided with a circular hole is beaten, so that the air in a straight cylinder can be vibrated. The outside air also vibrates along with the air. The vibrated air transmits sound waves into ears of a learner, and then the eardrumof the learner is knocked. Therefore, the learner can hear sounds. The learner can conveniently and visually experience sound transmission through ears. A candle is ignited, and then the rubber sheetwhich is not provided with the circular hole is beaten again. The vibrating air enables sound waves to be transmitted out through the circular hole. The candle is blown out, and the learner can visually know transmission of the sound through eyes. A pull rod is pulled to replace or fix the candle. A hand wheel can be rotated. The inclination angle of the straight cylinder can be adjusted. A hand rod can be rotated, and the straight cylinder can be stably fixed. Therefore, the sound propagation demonstration teaching aid is convenient to use.

Description

technical field

[0001] The invention belongs to the technical field of teaching display devices, in particular to a sound transmission demonstration teaching aid. Background technique

[0002] Sound is sound waves produced by vibrating objects. It is a wave phenomenon that is transmitted through a medium (air or solid, liquid) and can be perceived by human or animal auditory organs. The object that first vibrates (vibrates) is called the sound source. Sound travels in vibrations (shocks) in the form of waves. Sound is the movement of sound waves traveling through any material. In the teaching process, it is necessary to explain the transmission of sound. Since the transmission of sound cannot be directly seen, it needs to be explained with the help of demonstration teaching aids.

[0003] However, since the propagation of sound cannot be seen, teachers need to explain the principle of "sound is transmitted through vibration". In the process of explaining, problems are of...

Examples

Embodiment 1

[0024] Embodiment one, with reference to figure 1 , a sound propagation demonstration teaching aid, comprising a base 1, the top of the base 1 is fixed with a pillar 4 and a first threaded pipe 5 by bolts, the top center of the first threaded pipe 5 is embedded with a two-way threaded rod 6, and the two-way threaded rod 6 The other end of the sleeve is provided with a second threaded pipe 8, and the outer wall of the two-way threaded rod 6 is welded with a hand wheel 7, and the tops of the pillar 4 and the second threaded pipe 8 are rotated to be provided with a ring sleeve 11, which slides inside the ring sleeve 11. A straight cylinder 9 is embedded, and the two ends of the straight cylinder 9 are respectively sleeved with a first rubber ring 10 and a second rubber ring 12. The top of the base 1 is located below the second rubber ring 12 and is welded with a fixed ring block 2, and the fixed ring block 2. A candle 3 is inserted in it. When in use, light the candle 3 and turn ...

Embodiment 2

[0025] Embodiment two, refer to figure 2 , image 3 with Figure 4 , the first rubber ring 10 and the second rubber ring 12 are welded with a limit ring 18, the side of the limit ring 18 away from the straight cylinder 9 is fitted with a rubber sheet 19, and the other side of the rubber sheet 19 is provided with a pressure ring 20, and the pressure ring 20 is fixed with the stop ring 18 by bolts, and there are two rubber sheets 19, wherein a circular hole 21 is opened at the center of a rubber sheet 19 located in the second rubber ring 12, and the ring sleeve 11 A screw rod 13 is embedded in the center of the top, and one end of the screw rod 13 located inside the ring sleeve 11 is covered with an arc-shaped plate 15, and one end of the screw rod 13 located in the arc-shaped plate 15 is welded with a rotating block 16, and the screw rod 13 is far away from the arc-shaped plate 15 One end of the handle bar 14 is welded, so that the screw rod 13 is rotated by the hand bar 14,...

Embodiment 3

[0026] Embodiment three, refer to figure 1 with Figure 5 , the fixed ring block 2 is slidingly embedded with a pin rod 22, and one end of the pin rod 22 located on the outside of the fixed ring block 2 is welded with a pull rod 23, and the side of the pull rod 23 near the fixed ring block 2 is welded with two telescopic rods 24, two The other end of two telescopic rods 24 is welded with fixed ring block 2, and the outer side of two telescopic rods 24 is sheathed with two second springs 25, and the two ends of two second springs 25 are connected with fixed ring block 2 and pull bar respectively. 23 welding, the user can pull the pull rod 23, the pull rod 23 will drive the pin rod 22 to move, and the two telescopic rods 24 will also become, so that the second spring 25 is in a stretched state, and the candle 3 can be put into the fixed ring block 2 , loosen the pull rod 23, under the action of the restoring force of the second spring 25, the pin rod 22 will be reset, and the c...

technical field

[0001] The invention belongs to the technical field of teaching display devices, in particular to a sound transmission demonstration teaching aid. Background technique

[0002] Sound is sound waves produced by vibrating objects. It is a wave phenomenon that is transmitted through a medium (air or solid, liquid) and can be perceived by human or animal auditory organs. The object that first vibrates (vibrates) is called the sound source. Sound travels in vibrations (shocks) in the form of waves. Sound is the movement of sound waves traveling through any material. In the teaching process, it is necessary to explain the transmission of sound. Since the transmission of sound cannot be directly seen, it needs to be explained with the help of demonstration teaching aids.

[0003] However, since the propagation of sound cannot be seen, teachers need to explain the principle of "sound is transmitted through vibration". In the process of explaining, problems are of...

Examples

Embodiment 1

[0024] Embodiment one, with reference to figure 1 , a sound propagation demonstration teaching aid, comprising a base 1, the top of the base 1 is fixed with a pillar 4 and a first threaded pipe 5 by bolts, the top center of the first threaded pipe 5 is embedded with a two-way threaded rod 6, and the two-way threaded rod 6 The other end of the sleeve is provided with a second threaded pipe 8, and the outer wall of the two-way threaded rod 6 is welded with a hand wheel 7, and the tops of the pillar 4 and the second threaded pipe 8 are rotated to be provided with a ring sleeve 11, which slides inside the ring sleeve 11. A straight cylinder 9 is embedded, and the two ends of the straight cylinder 9 are respectively sleeved with a first rubber ring 10 and a second rubber ring 12. The top of the base 1 is located below the second rubber ring 12 and is welded with a fixed ring block 2, and the fixed ring block 2. A candle 3 is inserted in it. When in use, light the candle 3 and turn ...

Embodiment 2

[0025] Embodiment two, refer to figure 2 , image 3 with Figure 4 , the first rubber ring 10 and the second rubber ring 12 are welded with a limit ring 18, the side of the limit ring 18 away from the straight cylinder 9 is fitted with a rubber sheet 19, and the other side of the rubber sheet 19 is provided with a pressure ring 20, and the pressure ring 20 is fixed with the stop ring 18 by bolts, and there are two rubber sheets 19, wherein a circular hole 21 is opened at the center of a rubber sheet 19 located in the second rubber ring 12, and the ring sleeve 11 A screw rod 13 is embedded in the center of the top, and one end of the screw rod 13 located inside the ring sleeve 11 is covered with an arc-shaped plate 15, and one end of the screw rod 13 located in the arc-shaped plate 15 is welded with a rotating block 16, and the screw rod 13 is far away from the arc-shaped plate 15 One end of the handle bar 14 is welded, so that the screw rod 13 is rotated by the hand bar 14,...

Embodiment 3

[0026] Embodiment three, refer to figure 1 with Figure 5 , the fixed ring block 2 is slidingly embedded with a pin rod 22, and one end of the pin rod 22 located on the outside of the fixed ring block 2 is welded with a pull rod 23, and the side of the pull rod 23 near the fixed ring block 2 is welded with two telescopic rods 24, two The other end of two telescopic rods 24 is welded with fixed ring block 2, and the outer side of two telescopic rods 24 is sheathed with two second springs 25, and the two ends of two second springs 25 are connected with fixed ring block 2 and pull bar respectively. 23 welding, the user can pull the pull rod 23, the pull rod 23 will drive the pin rod 22 to move, and the two telescopic rods 24 will also become, so that the second spring 25 is in a stretched state, and the candle 3 can be put into the fixed ring block 2 , loosen the pull rod 23, under the action of the restoring force of the second spring 25, the pin rod 22 will be reset, and the c...

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