The Collaborative International Dictionary
Echometer
Echometer \E*chom"e*ter\, n. [Gr. ?, ?, sound + -meter: cf. F.
['e]chom[`e]tre.] (Mus)
A graduated scale for measuring the duration of sounds, and
determining their different, and the relation of their
intervals.
--J. J. Rousseau.
Usage examples of "echometer".
Tell the watch to keep an eye on the echometer and to keep to the deepest water they can.
As we sailed I watched the trace of the echometer with intense concentration.
So on our last run out to sea for testing we dumped the food supplies, and also recalibrated the echometers against proven and charted soundings.