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.
What is the difference in arrival time between left and right ears, for a sound that comes from the listener's left? If the sound comes from directly in front of the listener? Calculate the difference in arrival time between the left and right ears for a sound that comes from 45˚ off-axis (for example, if the sound comes from the northwest when the listener is facing north). Take the distance between left and right ears as 0.2 m, and the distance from the source to the center of the listener's head (exactly halfway between the ears) as 1.0 m. Take the speed of sound as 343 m/s.
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