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What happen to the loudness of sound as the distance incrase between a person and the source of the sounds?
Wiki User
∙ 13y ago
Don't use the word loudness, because that is a psychoacoustic personal feeling. Look for sound pressure.
The sound pressure decreases with distance r in a free field (direct field).
The next question is. How does the sound decrease with increasing distance? After which law?
The sound pressure p diminishes with distance after the 1/r law. Sound pressure decreases inversely as the distance increases with 1/r from the sound source. The Sound pressure level (SPL) decreases by (−)6 dB per doubling of distance from the source to 1/2 (50 %) of the sound pressure initial value.
Equations: p2 / p1 = r1 / r2 and p2 = p1 x r1 / r2 or r2 = r1 x p1 / p2
p1 = sound pressure 1 at reference distance r1 from the sound source.
p2 = sound pressure 2 at another distance r2 from the sound source.
Scroll down to related links and look at "How does the sound or the noise decrease with distance?"
Wiki User
∙ 13y ago
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What will happen to the loudness if The distance between the source and the observer is doubled?
It should fall to a quarter.
What would happen to two magnets if the distance between them increase?
Their magnetic influence will decrease (lessen) as the distance apart increases.
What happen to the air particles if there is a compression?
They will move apart until there is an infinite distance between them.
What will happen to the gravitational force of attractive between 2 masses if the distance between them is doubled?
it would reduce by two squared, which is 4
What would happen to the force of gravity between 2 objects if their masses remained constant but their distance between them decreased?
The force of gravity between two objects will increase if their distances decrease. The force of gravity or proportional to the objects' masses, and inversely proportional to the square of the distance between them.
What will happen to the loudness if The distance between the source and the observer is doubled?
It should fall to a quarter.
What will happen to the loudness of a sound if the surface area of the vibrating body is decreased?
loudness is inversely proportional to the surface area so it increases when surface area decreases
What will happen to the eccentricity of an ellipse as the distance between the foci increases?
the eccentricity will increase.
What would happen to two magnets if the distance between them increase?
Their magnetic influence will decrease (lessen) as the distance apart increases.
What happen to the air particles if there is a compression?
They will move apart until there is an infinite distance between them.
What will happen to the gravitational force of attractive between 2 masses if the distance between them is doubled?
it would reduce by two squared, which is 4
What will happen if the max distance of the earth from the sun exceeded and when the min distance decreases?
Greater differences between summer and winter and more extreme weather.
What will happen to the gravitational force when the distance between the centers of the two bodies is halved?
The force will increase fourfold.
What happen if vary change the distance between the magnet and the nails?
the closer the magnet is to the nails the greater the magnetic force between the magnet and the nails
What would happen to Earth and tides if the distance between Earth and the Moon increased?
Tides would become stronger.
What would happen to the earth tides if the distance between earth and the moon increased?
Tides would become stronger.
What would happen to the force of gravity between 2 objects if their masses remained constant but their distance between them decreased?
The force of gravity between two objects will increase if their distances decrease. The force of gravity or proportional to the objects' masses, and inversely proportional to the square of the distance between them.
