1. A scale or rule, serving to measure the duration of sounds with the intervals and ratios.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• wchometer,
• schometer,
• dchometer,
• rchometer,
• 4chometer,
• 3chometer,
• exhometer,
• evhometer,
• efhometer,
• edhometer,
• ecgometer,
• ecyometer,
• echometre,
• echo meter,
• Ekmometer,
• Echometor,
• Echmetor,
• Echomoter,
• Ekometer,
• Echometerth

The plural of the "Echometer" can be the "echometers".

The singular of the "Echometer" can be the "Echometer".