Audio - acoustics animations, java applets, flash

Beats Beats (periodic rise and fall in intensity) are produced when two waves of nearly equal frequency are added. The beat frequency is the difference of the two frequencies, while the resultant waveform itself varies at the mean of the two frequencies

Beats Primary Beats and Combination Tones, FFT, waveform, frequency difference, frequency discrimination, combination tones

Beats Vary the two frequencies, f1 and f2, between 1 und 100 Hz and see the corresponding beat pattern emerge

Beating waves the animation shows how the waves in the top and middle panels add together to create a beat pattern in the bottom panel, beating waves

Doppler effect Doppler effect, sound pitch, echo-Doppler

Doppler effect Doppler effect

Doppler effect an emergency ambulance with switched on siren passes a person who is standing at the street

Doppler effect simulation of the relativistic and non-relativistic Doppler effect. There is also also a tutorial about writing applets

Doppler effect 2 Doppler effect

Doppler effect 4

Doppler effect with interference Doppler effect with two sources so you can see interference patterns

Interference of Sinusoidal Waveforms Manipulate two sine waves and watch them interact

Longitudinal wave Flash

Shock waves source moves with the velocity of sound, source moves with subsonic velocity, source of acoustic waves moves with supersonic velocity

Sound beats Sound beats, swf file

Sound wave approximation

Sound wave interference explains what happens to the energy of sound waves when the waves interact, Compare and contrast constructive interference and destructive interference

Sound waves Flash

Sound Waves a tip

Sound How Sound Reaches You

Sound Speed of sound animation, Measuring the speed of sound

Sound as a mechanical wave A wave is a disturbance of a medium which transports energy through the medium without permanently transporting matter. In a wave, particles of the medium are temporarily displaced and then return to their original position

Sound Waves

Superposition of two waves two sine waves travelling in the same direction: constructive and destructive interference, two sine waves travelling in opposite directions create a standing wave, superposition of waves, two sine waves with different frequencies: beats

Waves and Sound Tone beats when two sounds are very similar in frequency, you'll hear pulses due to the nature of waves. Try to determine several mystery frequencies, Intensity as a Function of Position, Wave Interference, Standing Waves

Traveling wave

Horizontaal

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