As the number of people at a party increases,you must raise your voice for a listener to hear you againstthe background noise of the other partygoers. However, once youreach the level of yelling, the only way you can be heard is if youmove closer to your listener, into the listener’s “personal space.”Model the situation by replacing you with an isotropic point sourceof fixed power P and replacing your listener with a point that absorbspart of your sound waves.These points are initially separatedby ri=1.20 m. If the background noise increases by b=5 dB, thesound level at your listener must also increase.What separation rfis then required?
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.
As the number of people at a party increases,
you must raise your voice for a listener to hear you against
the background noise of the other partygoers. However, once you
reach the level of yelling, the only way you can be heard is if you
move closer to your listener, into the listener’s “personal space.”
Model the situation by replacing you with an isotropic point source
of fixed power P and replacing your listener with a point that absorbs
part of your sound waves.These points are initially separated
by ri=1.20 m. If the background noise increases by b=5 dB, the
sound level at your listener must also increase.What separation rf
is then required?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 3 images
