Phase locking is used for sound frequencies up to around 1000 hz. at higher frequencies, tonotopy is used. the note "concert pitch a", or 440 hz, is commonly used to tune instruments in an orchestra or musical ensemble. if an instrument is playing concert pitch a, how fast are action potential spikes in the auditory nerve?
(a) 440 hz
(b) 1100 hz
(c) 1000 - 440 = 60 hz
(d) this is a trick question. action potentials are all-or-none and therefore do not change of change frequencies.