A higher mean amplitude or lower standard deviation of the EOD of the swimming fish facilitates estimation of beat frequency at the receptor level.

<p>(A) The height (solid line) of the peak of at the beat frequency, , and the width (dashed line) of this peak at the coherence value of 0.15 increase and slightly decrease, respectively, with (with fixed = 0.1). However (B), the above height and width slightly decrease and strongly increase, respectively, with (with fixed = 0.2). Therefore (C), the height-to-width ratio of this peak slightly increases with , while (D) it decreases rapidly with . The curves in this figure and next figure are the average results over five artificial signals with = [827,737], [827,760], [827,792], [827,704], [740,807]Hz; 50 independent OU processes were used to calculate the average for each artificial signal.