Cochlear and fast electrical responses to frequency modulated tones: a frequency specific  stimulus.
Some characteristics of "the fast response" to frequency modulation were explored here by examining (1) CM and AP in animal experiment and (2) BER in human study. CM to frequency modulated tone showed frequency change and amplitude change, the latter of which is probably due to frequency characteristics of the sound conductive system of the ear. Compared with AP to tone burst, latency and amplitude of AP to FM tone depends less on stimulus intensity. AP to FM tone is suspected to be a result of new excitement of the restricted area stimulated by shifted frequency. The result of analysis on human BER is well consistent with the result of AP study in animal experiment, and latency curves of BER were to some extent linear to a log scale of shifted frequencies. Thus, FM tone is possibly a frequency specific stimulus.
D000161:Acoustic Stimulation; D000200:Action Potentials; D000818:Animals; D001299:Audiometry / Q000379:methods*; D001300:Audiometry, Evoked Response / Q000379:methods*; D001933:Brain Stem / Q000502:physiology; D003051:Cochlea / Q000502:physiology*; D004569:Electroencephalography; D006168:Guinea Pigs; D006801:Humans; D011930:Reaction Time; D012405:Round Window, Ear / Q000502:physiology