Cidepe

Function

Intended for study, physics laboratory, physics experiments on: Mechanical waves. Acoustics. Sound sources, sound, noise, and physiological qualities of sound. What is sound? The frequency of a sound wave, high-pitched sound, and low-pitched sound. Auditory intensity, a physiological quality associated with sound amplitude. The difference between auditory intensity and the sound intensity of a wave. A wave carries only energy. Undesirable sounds, industrial noise. Sound reverberation. Echo and reverberation of sound. Reverberation time. Sound beats, constructive and destructive interference between two component waves. Sound resulting from the superposition of two sound waves. The average period and frequency of beats. How the period of beats relates to the periods of the component waves. How the frequency of beats relates to the frequencies of the component waves. Standing sound waves in an open tube, resonance. Sound, a mechanical, longitudinal, and three-dimensional wave. What is meant by a closed sound tube and an open sound tube. Sound and wave interference, the standing wave in an open tube. The fixed points of constructive and negative interference, the nodes and apexes of the standing wave. The speed at which sound propagates in a mechanical medium. Timbre. Auditory intensity, with an observer intervening. The apexes and nodes of the standing sound wave, listening inside the open sound tube. Determining the speed of sound in a sound tube, Kundt's tube, open. The positions of the apexes and nodes, indicated by cork dust, in an open tube. Standing sound waves in a closed tube, resonance. The speed at which sound propagates in a mechanical medium. Some factors that influence the speed of sound. The apexes and nodes of the standing sound wave, listening inside the sound tube. Determining the speed of sound in a closed sound tube. The positions of the apexes and nodes, indicated by cork dust, in a closed tube. The apexes and nodes indicated by cork dust. Mechanical waves on strings. Standing waves on a vibrating taut string. Applying transverse periodic perturbations to a taut string. The incident wave, reflected wave, resonance wave, and fundamental vibration frequencies. Identifying nodes, antennities, and wavelength. Identifying other natural frequencies, harmonics, and resonant frequencies, maintaining the length L and tension force. Listening to the sound along the antennities and nodes of the standing wave on a string. Varying the length and tension force, identifying the fundamental frequency and harmonics. Calculating the propagation speed of the incident wave and the reflected wave on a vibrating taut string. Comparing waves on vibrating taut strings with the same length and different linear densities under the same tension. The incident wave, the reflected wave, and the resonance wave. The first harmonic on strings with different linear densities. Calculating and comparing the propagation speed values on vibrating taut strings with different linear densities. Waves on a vibrating taut string composed of segments of different linear densities. Taylor's expression applied to a vibrating taut string, with a tensiometer. Determining the propagation speed of the disturbance along the string. Mechanical waves in springs. Longitudinal waves in a vibrating taut helical spring, standing waves. Observing longitudinal waves in a vibrating taut helical spring. Nodes, anterolaterals, and wavelength. Identifying other natural frequencies and harmonics. Mechanical waves in plates. Chladni resonant plate figures, vibration mechanics. Observing and listening to sound in the anterolaterals and nodes of an oscillating plate subjected to different excitation frequencies, etc.

Cidepe - Industrial Center for Teaching and Research Equipment - is a company of reference in educational instruments in educational institutions in Brazil and abroad. With an experienced team of engineers, professors, researchers, consultants and other collaborators, Cidepe develops products with technology and human talent to improve the teaching dynamics.
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Details

Details with the main experiments