tonemeter
nounUK /ˈtəʊnmiːtə/
US /ˈtoʊnmiːtər/
A tool that shows how light or dark a color is.
The artist used a tonemeter to check the shade of blue.
RELATED WORDS
OTHER MEANINGS
2. A device that measures the pitch or quality of a sound.
The sound engineer adjusted the tonemeter during the recording.
3. An instrument for measuring the density of photographic tones.
He checked the tonemeter before printing the photograph.
4. A gauge that indicates the strength of a musical tone.
The tonemeter showed a steady pitch from the violin.