Science popularization device for sound wave visualization

Abstract

The invention relates to the science popularization field for standing wave tests, and more particularly, to a science popularization device for sound wave visualization. The device comprises a base, a horizontally arranged rolling cylinder, a driving motor to drive the rolling cylinder to rotate, an elastic string group, and a lifting and lowering support to drive the elastic string group to rise and fall. The elastic string group comprises a plurality of elastic strings arranged horizontally right above the rolling cylinder; and the elastic strings are perpendicular to the axis of the rolling cylinder. The lifting and lowering support comprises a first lifting and lowering frame and a second lifting and lowering frame arranged at two ends of the elastic string group. The cylindrical face of the rolling cylinder is provided with strips which are arranged alternately and whose colors are black and white. According to the invention, based on the height of an observer and through the rotation of a first rotating rod and a second rotating rod to adjust the distance from the elastic strings to the rolling cylinder as well as for the strips under the rotation of the rolling cylinder, it is possible to notice the wave fluctuations clearly. The rotation of a second threaded pipe makes the second threaded pipe generate certain displacement away from a first mounting plate with regard to a first threaded pipe so that the elastic strings are stretched to some length to ensure that each elastic string is tight and that the elasticity of the elastic strings meets the testing requirement.

Description

technical field [0001] The invention relates to the field of science popularization of standing wave experiments, in particular to a science popularization device for visualization of sound waves. Background technique [0002] The research on the propagation law of waves on strings is an important experiment in mechanical experiments, and it has been included in the national comprehensive university physics experiment teaching syllabus. General experimental instruments focus on observing the standing waves formed on strings, and use experiments to determine strings. When vibrating, the relationship between standing wave wavelength and tension, the relationship between standing wave wavelength and vibration frequency, and the relationship between standing wave wavelength and string density. [0003] The elastic medium of the current standing wave experimental equipment will become less elastic after long-term fluctuations, and the experimental effect will be poor, and the dis...

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Problems solved by technology

[0003] The elastic medium of the current standing wave experimental equipment will become less elastic after long-term fluctuations, and the experimental effect will be poor, and the distance between the elastic medium and the black and white stripes cannot be adjusted, and the effect of observing the standing wave cannot be adjusted. Adjustment

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