Webster's 1828 Dictionary
SONOMETER
n.[L. sonus, sound, and fero, to measure. ] An instrument for measuring sounds or the intervals of sounds.
Webster's 1913 Dictionary
SONOMETER
So *nom "e *ter, n. Etym: [L. sonus a sound + -meter. ]
1. (Physiol.)
Defn: An instrument for exhibiting the transverse vibrations of cords, and ascertaining the relations between musical notes. It consists of a cord stretched by weight along a box, and divided into different lengths at pleasure by a bridge, the place of which is determined by a scale on the face of the box.
2. An instrument for testing the hearing capacity.
Oxford Dictionary
sonometer
sonometer |səˈnɒmɪtə | ▶noun another term for monochord.
Duden Dictionary
Sonometer
So no me ter Substantiv, Neutrum , das |Sonom e ter |das Sonometer; Genitiv: des Sonometers, Plural: die Sonometer lateinisch ; griechisch Schallstärkemesser
The Wordsmith Dictionary