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Sound wave has its own intensity which is defined by common word sound level. Sound intensity (I) is gotten by following pattern:
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Sound level is gotten by following pattern:
Figure 0. Sound pressure pattern (http://wideawakeparanormal.com/main/images/stories/spl.jpg)
Figure 2. Sound pressure level table (https://www.brechbuehler.ch/typo3temp/pics/e1b7211d3c.jpg)
Sound travelling speed depends on temperature and material.
Figure 3. (http://www.ctgclean.com/tech-blog/wp-content/uploads/Speed-of-Sound-Table.jpgh
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