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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.

Sometimes it is said, that the sound decreases with with 1/r², the inverse square law. That is really wrong.

Scroll down to related links and look at "Damping of sound level with distance".

p2 / p1 = r1 / r2 and p2 = p1 x r1 / r2

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?"

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Q: What is the effect of distance on sound?
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The pitch of a sound is the distance from the sound source?

The pitch of a sound means the frequency. That stays constant with distance. You mean the sound pressure level that decreases with distance.


How does the Doppler Effect effects sound?

There is a limitation od Doppler's effect in sound. Doppler's effect is applicable provided if the relative velocity of the source and the listener is less than the velocity of sound.


What happen to the loudness of sound as the distance incrase between a person and the source of the sounds?

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 / p2p1 = 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?"


What happens to the pitch when the sound source moves away from you?

The pitch lowers as the wavelength of the sound increases. It's called the Doppler effect


What do you call the occurrence of a sound getting louder as it approaches and quieter as it travels away?

It is called sound spreading. The sound wave is strongest at the source and the wave spreads out as it is farther away

Related questions

How loud is 10W?

The effect of the sound pressure on your ears depends on the distance to the sound source.


What effect does distance have on sound?

The sound pressure decreases with distance after the distance law 1/r. (No squre!) Our ear drums are only moved by the sound pressure of the air. Scroll down to related links and look at "Inverse Distance law".


How can people observe the Doppler effect?

For example when firemen car passes around them. The sound is distorted according to distance in which the car is.


The pitch of a sound is the distance from the sound source?

The pitch of a sound means the frequency. That stays constant with distance. You mean the sound pressure level that decreases with distance.


Ways to measure sound from an distance?

to measure sound from distance use decibels


Does distance effect a magnets activity?

it does effect the distance because it is far


What distance is loudness of sound measured?

There is really no standard distance from the sound source where the sound pressure level (SPL) is measured.


How does air effect sound?

In vaccum there is no sound.


What is the use sound to find distance?

Are you looking for the inverse distance law? How sound pressure decreases with distance? Scroll down to related links and look at "Sound pressure p and the inverse distance law 1/r".


Does the mars rover take in sound or distance?

sound


What distance is the loudest sound made by a spider?

At a very close distance to the spider you hear the loudest sound.


What is ough with the o sound?

Sound refers to the particular auditory effect that is produced by a given effect.