For standing waves on a string of length L, the higher frequencies are not multiples of the fundamental when one end is free. O increasing the tension on the string gives fewer antinodes for the same frequency. both ends must be fixed (stationary). O the n'th mode of vibration has an additional full wavelength than the n-1st mode had. the nodes are the only places where the string is ever at zero displacement.
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
Standing wave is a type of stationary wave in which the peak of the wave oscillates with a time period but doesnot move in space. It is caused by interference of two travelling waves of same frequency and same amplitude.
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