echo

2.41  echo. Wave that has been reflected or otherwise returned with sufficient magnitude and delay to be detectable as a wave distinct from that directly transmitted.

Annotation 1                  An echo is separately localizable.

Annotation 2          See also 10.29.

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Alternative Meanings:
  • echo
    10.29  echo. Reflected sound wave that arrives with sufficient magnitude and time delay as to be distinguishable as a repetition of the direct sound. Annotation              See also 2.41.
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