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Determining the distance of a pipe by the length of an echo

  1. Feb 24, 2010 #1
    How could I determine the length of a pipe by playing a certain frequency into it, then measuring how long the echo is audible?
  2. jcsd
  3. Feb 24, 2010 #2
    Identify the time interval between the emission of the transmitted sound (frequency-independent; ensure your transmitted sound is a discreet click rather than a long, continuous soundwave for ease of calculation) and it's return echo. The pipe is assumed to be measueable in feet less than 5280 (or one mile); sound travels at around 1467 feet/sec. Divide your time interval by 1467, then divide that answer by 1/2 (remember, the sound wave travels twice the distance of your pipe, hence the reason for the second division by 1/2) to arrive at your answer.
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