資料來源 : pyDict

測回聲術

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Echometry \E*chom"e*try\, n. [Cf. F. ['e]chom['e]trie.]
   1. The art of measuring the duration of sounds or echoes.

   2. The art of constructing vaults to produce echoes.