Complex sentence: Rasp is a burst of pulses at a relatively constant frequency performed by some species during courtship; smooth acceleration is a period of tens to hundreds of milliseconds that EOD rate increases but in a smooth way.
Split into simpler sentences: Rasp is a burst of pulses at a relatively constant frequency performed by some species during courtship. Smooth acceleration is a period of tens to hundreds of milliseconds that EOD rate increases but in a smooth way.