enny and her friend Elaine are attending a rock concert. Elaine had special tickets to the VIP area and is standing 10 m from the stage. Using her portable equipment, she determines that the noise in her section is 100 decibels. Jenny had cheaper tickets and is standing 100 m away. a) Using the inverse square law, how does the sound intensity compare where Jenny is (100 m from the stage) compared to where Elaine is (10 m from the stage)? b) How loud is it where Jenny is standing (in dB)
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.
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