During a fireworks show a rocket explodes above a listener 1km high with respect to the ground while the sound produces 520watts of power. A group of people talking and they all produce sound levels of the same magnitude at the listener’s position. The combined level when all four talks at once is 72dB. If a man is shouting producing SPL of 82dB and is 160m away east side of the listener’s position; a. What is the sound intensity produced by the rocket explosion at the man’s position? b. Determine the sound intensity level of the
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.
During a fireworks show a rocket explodes above a listener 1km high
with respect to the ground while the sound produces 520watts of power.
A group of people talking and they all produce sound levels of the same
magnitude at the listener’s position. The combined level when all four
talks at once is 72dB. If a man is shouting producing SPL of 82dB and is
160m away east side of the listener’s position;
a. What is the sound intensity produced by the rocket explosion at the man’s position?
b. Determine the sound intensity level of the man shouting at the group of people talking location when they are 120m away from the listener.
c. Calculate the sound power produced by the individual four people
talking.
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