Piezoelectric property of otoliths.
Otoliths of two species of bony fishes have been found to be piezoelectric. Hence, in theory, they constitute a mechanism for depth perception or frequency analysis of sound waves, or both.
D000818:Animals; D003867:Depth Perception; D007758:Ear, Inner / Q000502:physiology*; D004594:Electrophysiology; D005399:Fishes / Q000502:physiology*; D008566:Membranes / Q000502:physiology*; D011984:Sensory Receptor Cells / Q000502:physiology*; D013016:Sound; D014961:X-Ray Diffraction