“…The pulsed temporal structure of the call is crucially important for species Gerhardt, 2005;Gerhardt, 2008;Gerhardt and Doherty, 1988;Schul and Bush, 2002). In dense choruses, however, in which the calls of multiple males may overlap in time and frequency (Schwartz et al, 2002), the temporal structure of pulsed calls could become compromised to such a degree at the position of a receiver so as to interfere with call recognition or the perception of call attractiveness Schwartz, 1987;Schwartz and Gerhardt, 1995;Schwartz and Marshall, 2006). More specifically, the silent 'gaps' between pulses in a male's call (Fig.1A) could become 'filled in' at the position of a receiver due to the effects of both background noise and reverberations associated with physical structures (e.g.…”