an instrument employed in acoustic analysis or investigation, consisting usually of one string stretched over a resonator of wood
sonometer in American English
(səˈnɑmɪtər)
noun
Medicine
audiometer
Word origin
[1800–10; sono- + -meter]This word is first recorded in the period 1800–10. Other words that entered Englishat around the same time include: chlorine, hike, jumbo, peripheral, sodium-meter is a combining form meaning “measure,” used in the names of instruments measuringquantity, extent, degree, etc. Other words that use the affix -meter include: altimeter, interferometer, manometer, radiometer, variometer