English

telephonometric

From tele- + phonometric.

Proto-Indo-European *kʷel- ‘to turn, revolve’

Ancient Greek τῆλε ‘at a distance, far off, far away, far from’

English tele-

Today it means

adj Relating to the measurement of sound transmitted telephonically.

Language periods are conventional ranges, not dates for this word.

Etymograph / telephonometric