Abstract
Responses of single primary auditory neurons to electro-magnetic driving of the ear drum were studied. From the latency measurement of the responses of neurons for either attraction or repulsion of the ear drum, trigger action may result from basilar membrane displacement toward the scala vestibuli. The traveling wave occurs along the basilar membrane when a step function type of stimulus is applied to the ear drum electromagnetically. This means that the basilar membrane moves due to its natural vibration for the transient effect and does not respond to the steady phase of the stimulus.