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.
6. Oscillations and sounds:
a.A wave with wavelength 27 m and time between crests of 0.5 s is traveling in water. What is wavelength, frequency,period, and the wave speed?
b. You blow into one end close pipe and produce a tone. Explain what happens to the frequency of the tone if you open both ends of the pipe and blow into it again?
c. A car moving away from you at the speed of 50.0 m/s while you are standing on the sidewalk. The engine produces sound at 27 Hz and the speed of sound is 340 m/s. What is the frequency you hear?
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