# Distance Sound has Traveled

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d =
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vCalc.Distance Sound has Traveled
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The Distance Sound Traveled calculator computes the distance sound has traveled based on the speed of sound and the duration of travel.

INSTRUCTIONS:  Choose units and enter the following:

• (V) This is the local speed of sound
• (t) This is the duration of the travel

Distance Sound Traveled (d):  The calculator returns the distance in meters.  However this can be automatically converted to compatible unit via the pull-down menu.

#### The Math / Science

Have you ever guessed how far away lightning is by counting seconds from the flash until you heard the boom?  What you've done is made a estimate of the distance sound has traveled in a period of time.  The formula for the distance sound has traveled is :

d = V • t

where:

The Speed of Sound in dry air is 343.2 meters  per second.