Changes in the CV of the EOD during behaviors known to affect EOD frequency. (A) Neither during the rising nor the falling phase of the JAR, in response to a jamming stimulus (Stim), does the EOD CV change. (B) A spontaneous rise in EOD frequency, called a chirp, often is associated with a prolonged increase in CV, lasting many seconds on either side of the chirp. Window length: 200 cycles.