`D = (ET * v) / 2`

Enter a value for all fields

The Echo Surface Distance calculator estimates the distance to the bounce surface of an echo based on the echo time delay and the velocity of the sound.

INSTRUCTIONS: Choose units and enter the following:

• (ED) Echo Time Delay
• (v) Velocity of Sound in Medium (e.g., air)

Echo Surface Distance (D): The distance is returned in meters.  However, these can be automatically converted to compatible units via the pull-down menu.

The Math / Science

The Echo Surface Distance equation estimates the distance to the bounce surface of an echo.  The formula is:

D = (v * ET)/2 

where:

• ET = Echo Time
• D = distance to bounce surface
• v = velocity of sound

Sound Velocity in Medium

• Speed of Sound in Air = 342.2 meters per second
• Speed of Sound in Water = 1,480 to 1,490 meters per second

Sound Calculators

• Echo Surface Distance: Estimates the distance to the bounce surface of an echo based on the echo time delay and the velocity of sound.
• Echo Time: Computes the time lag of an echo based on distance and velocity of sound.