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fall phonometer, fallphonometer
An instrument used in experimental psychology designed to furnish sounds whose intensities are in known ratios by permitting balls to drop from different heights upon plates of metal or slate.
This entry is located in the following units:
meter-, metro-, metr-, -metrical, -metrically, -metron, -metric, -metrist, -meter, -meters, -metry, -metre
phon-, phono-, -phone, -phonia, -phonic, -phonetic, -phonous, -phonically, -phonetically, -phony +