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, physiological quality associated with the amplitude of sound. Difference between auditory intensity and sound intensity of the wave. The wave carries only energy. Undesirable sounds, industrial noise. Sound reverberation. Sound echo and reverberation. Reverberation time. Sound beat, constructive and destructive interference between two component waves. Sound resulting from the superposition of two sound waves. The average period and frequency of the beats. How the period of the beats relates to the periods of the component waves. How the frequency of the 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 interference and negative interference, the nodes and apexes of the standing wave. The speed at which sound propagates in a mechanical medium. The timbre. The auditory intensity, with the intervention of an observer. 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 powder, 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 powder, in a closed tube. The apexes and nodes indicated by cork powder. Mechanical waves on strings. Standing waves on a vibrating taut string. Applying transverse periodic disturbances to a taut string. The incident wave, reflected wave, resonance wave and fundamental frequencies of vibration. Identifying nodes, apexes and wavelength. Identifying other natural frequencies, harmonics and resonant frequencies, keeping the length L and the tension force. Listening to the sound along the apexes 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, different linear densities, under the same tension. The incident wave, the reflected wave and the resonance wave. The first harmonic in strings with different linear densities. Calculating and comparing the values of the propagation speed in 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, antennularities and wavelength. Identifying other natural frequencies, harmonics. Mechanical waves in plates. Chladni resonant plate figures, mechanics of vibrations. Observing and listening to the sound in the antennularities and nodes of an oscillating plate subjected to different excitation frequencies, etc.

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Details

Details with the main experiments