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Principle
When a sound wave of a particular frequency is divided into two coherent components (like, for example, light waves in an interferometer experiment), and if the path of one of the component waves is altered, it is possible to calculate the wavelength ...
A sound wave of a particular frequency is divided into two coherent components (like, for example, light waves in an interferometer experiment), and if the path of one of the component waves is altered, it is possible to calculate the wavelength of the sound wave an ...
Acoustic cavity resonators posses a characteristic frequency which is determined by their geometrical form. In this case the resonator is excited to vibrations in its resonance frequency by background noise.
Tasks
Determination of diffe ...
A stationary ultrasonic wave in a glass cell full of liquid is traversed by a divergent beam of light. The sound wave length can be determined from the central projection of the sound field on the basis of the refractive index which changes with the sound pressure.
The sound waves transmitted to a liquid by the ultrasonic generator are picked up by a piezoelectric ultrasonic pick-up and the signal from transmitter and receiver compared on an oscilloscope. The wavelength is determined and the phase velocity calculated from the ...
Sound waves are radiated into a liquid by an ultrasonic transmitter and detected with a piezoelectric transducer. The wavelength of the sound is found by comparing the phase of the detector signal for different sound paths and, when the frequency is known, the veloc ...
An ultrasonic wave is subjected to hard surface reflection from a metal plate.The reflected wave superimposes on the incident wave, coincident in phase and amplitude, to form a standing wave. The intensity of this wave along the direction of propagation is measured ...
Sound needs a material medium with which it can enter into reciprocal action for its propagation, whereby a loss of energy occurs. The amplitude, and so also the intensity, decreases along the propagation path.
A plane ultrasonic wave is subjected to diffraction at single slits of various widths and at various double slits. The intensity of the diffracted and interfering partial waves are automatically recorded using a motordriven, swivel ultrasound detector and a PC.
A plane ultrasonic wave is subjected to diffraction at various multiple slits.The intensity of the diffracted and interfering partial waves are automatically recorded using a motordriven, swivel ultrasound detector and a PC.
A plane ultrasonic wave is subjected to diffraction by a pin-hole obstacle and a complementary circular obstacle. The intensity distribution of the diffracted and interfering partial waves are automatically recorded using a motor-driven, swivel detector and a PC.
A plane ultrasonic wave strikes a Fresnel zone plate. The sound intensity is determined as a function of the distance, using an ultrasonic detector that can be moved in the direction of the zone plate axis.
Ultrasonic waves of the same frequency, amplitude and direction of propagation are generated by two sources of sound positioned parallel to each other. The sources can vibrate both in-phase and out-of phase. The angular distribution of the intensity of the waves, wh ...
A partial packet of radiation passes directly from a fixed ultrasonic transmitter to a fixed ultrasonic receiver. A further partial packet hits against a metal screen that is positioned parallel to the connecting line between the transmitter and receiver, and is ref ...
An ultrasonic transmitter emits sound pulses onto a reflector, from which recording of them by a receiver shows a time delay. The velocity of sound is calculated from the path length and transmission time of the sound pulses.
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