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Updated: Jul 3, 2026

Infant Auditory Processing and Event-related Brain Oscillations
Published on: July 1, 2015
Simultaneous production of low- and high-frequency sounds by neonatal finless porpoises
Songhai Li1, Kexiong Wang, Ding Wang
1Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan 430072, People's Republic of China.
Abstract:
Phocoenids are generally considered to be nonwhistling species that produce only high-frequency pulsed sounds. Here our results show that neonatal finless porpoises (Neophocaena phocaenoides) frequently produce clear low-frequency (2-3 kHz) pulsed signals, without distinct high-frequency energy, just after birth and can produce both low- (2-3 kHz) and high-frequency (>100 kHz) pulsed signals simultaneously until about 20 days postnatal. The results indicate that low-frequency signals of neonatal finless porpoises are not an early form of high-frequency signals and suggest that low- and high-frequency signals may be produced by different sound production mechanisms.
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