How does sound dissipate with distance

Make Shortcut to Home Screen? Sound Propagation - the Inverse Square Law Doubling of the distance from a noise source reduces the sound pressure level with 6 decibel. Sponsored Links. This - the Inverse Square Law - can be expressed in a diagram like Download and print the Inverse Square Law chart - Sound pressure level reduction vs.

Privacy We don't collect information from our users. Citation This page can be cited as Engineering ToolBox, Sound Propagation - the Inverse Square Law.

This rule is known as the inverse square law. You can use it to roughly estimate the change in SPL without actually doing any real calculations. If you need exact numbers, though, don't hesitate to use this distance attenuation calculator! Embed Share via. Table of contents: What is the SPL sound pressure level? Sound attenuation formula Inverse square law.

What is the SPL sound pressure level? Sound attenuation formula Sound attenuation describes how the SPL changes with increasing distance from the sound source. Inverse square law Now, imagine that the distance from the sound source to point 1 is two times smaller than the distance from the source to point 2. Point 1. Distance from the source. Sound pressure level. No frequency dependance. How do high frequencies affect sound? Frequency dependance.

The used browser does not support JavaScript. You will see the program but the function will not work. Deutsche Version. There is no noise decrease or sound drop per meter. We get a sound level drop of 6 dB per doubling of distance. Sound power or sound power level has nothing to do with the distance from the sound source. This is an often-told and believed wrong tale. Thinking helps: A watt light bulb is emitting constantly the same power. That is really the case - no matter if in 1 m, in 10 m, or even in distance.

These emitted watts don't change with distance. They stay in the source. Sound power is the distance independent cause of this, whereas sound pressure is the distance-dependent effect.

Sound pressure sound field quantity is not sound intensity sound energy quantity. Loudnessis as a psychological correlate of physical strength amplitude is also affected by parameters other than sound pressure, including frequency, bandwidth and duration.

Reference distance r 1 from sound source m or ft. Another distance r 2 from sound source m or ft. An "unclear" statement: The "sound" decreases with the square of the distance. Which sound exactly? Payment options. Disclaimer Please note that this or any other calculators on the wkcgroup. Go to Top.