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Table 4 Measured and calculated pulse periods of female sounds from Ophidion rochei

From: Sexual dimorphism of sonic apparatus and extreme intersexual variation of sounds in Ophidion rochei (Ophidiidae): first evidence of a tight relationship between morphology and sound characteristics in Ophidiidae

  Captivity Field
Pulse period (ms) Measured (automatically during sound analysis) 4.0 3.7
  Calculated (1/fundamental frequency) 4.1 4.0