Sound energy visualizer

Abstract

The invention discloses a sound energy visualizer which comprises a sounding body. The sound energy visualizer is characterized by also comprising an air sac, a reflector adhered to the surface of the air sac, a laser pen and a bracket for fixing the laser pen. when the sound energy visualizer is in use, the air sac is put on a desk and the position and height of the bracket are regulated so that laser irradiates the reflector to form a bright light spot on a ceiling; and then the sounding body is knocked or started up so that the light spot continuously sways, which indicates that sound energy is transferred to the air sac actually and shakes the reflector on the air sac. The sound energy visualizer has the beneficial effects that the air sac is extremely light and is easy to sway under the influence of sound wave; the sway of the air sac is amplified by laser reflection so that the reflected light spot continuously and obviously sways on a wall or the ceiling, and the whole spot can be seen; and the back of the sounding body is over against the air sac, the light spot still sways, and the interference of air flow is eliminated; the sound energy visualizer has the advantages of clear logic, high scientificity and low cost and is convenient to operate.

Description

Technical field [0001] The invention relates to a middle school physics teaching instrument, in particular to a sound energy observer. Background technique [0002] In the physics textbook of the eighth grade volume 1 of Educational Science Press, the experimental plan for observing the energy of sound is as follows: cut thick paper into a circle, drill a hole in the middle, stick it firmly to one end of the paper tube, and wrap the paper tube with plastic film the other end, and then fasten it with a rubber band, such as figure 1 As shown in the part of the sounding body in the figure, 1 is the sounding body in the figure, 2 is the elastic membrane, and 3 is the hole. Light a candle in front of the paper tube, pick up the paper tube and align the small hole with the ignited flame, hit the plastic film at the other end of the paper tube to make it sound, and the flame can be seen shaking due to the impact of sound waves. [0003] The above-mentioned experiments have the di...

AI Technical Summary

Problems solved by technology

[0003] The above experiment has the disadvantages of confusing logic and not strong scientific nature: pointing the open end of the paper tube to the flame, in essence, the airflow during vibration is enhanced, so that the shaking of the flame can be seen. This kind of shaking is difficult to explain that the sound wave has energy.

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