Second thoughts on the second filter with special reference to the Kemp echo.
D003051:Cochlea / Q000502:physiology* / Q000503:physiopathology; D006198:Hair Cells, Auditory / Q000502:physiology; D006309:Hearing / Q000502:physiology*; D006801:Humans; D014012:Tinnitus / Q000503:physiopathology