An outside loudspeaker (considered a small source) emits sound waves with a power output of 100W. The surface area of a sphere is 4πr2. Calculate the area 10.0 m from the source. Which equation relates power and intensity? Calculate the intensity 10.0 m from the source.
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.
An outside loudspeaker (considered a small source) emits sound waves with a power output of 100W.
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The surface area of a sphere is 4πr2. Calculate the area 10.0 m from the source.
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Which equation relates power and intensity?
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Calculate the intensity 10.0 m from the source.
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Write the equation for intensity level.
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What does I0 represent? What is the value of I0?
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Calculate the intensity level 10.0 m from the source.
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Calculate the intensity 0.10 m from the source.
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Calculate the intensity level 0.10 m from the source.
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What is the difference in sound intensity levels at 0.10 m and 10.0 m?
10.What is the ratio of the intensity at 0.10 m to the intensity at 10.0m? 11.What is the intensity level (in decibels) of the threshold of pain? 12.Calculate the intensity of the threshold of pain.
13.At what distance from the speaker would you experience the threshold of pain?
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