echometry
E*chom"e*try, n. Etym: [Cf. F. échométrie.] 1. The art of measuring the duration of sounds or echoes. 2. The art of constructing vaults to produce echoes.
E*chom"e*try, n. Etym: [Cf. F. échométrie.] 1. The art of measuring the duration of sounds or echoes. 2. The art of constructing vaults to produce echoes.