On the significance of similarities between ultrasonic vocalizations of infant and adult rats.

@article{Blumberg1991OnTS,
  title={On the significance of similarities between ultrasonic vocalizations of infant and adult rats.},
  author={Mark S Blumberg and Jeffrey R. Alberts},
  journal={Neuroscience and biobehavioral reviews},
  year={1991},
  volume={15 3},
  pages={383-90}
}
The communicatory significance of the 40 kHz vocalization of rat pups and the 22 kHz vocalization of adult rats have been topics of research for over three decades. The 40 kHz vocalization is emitted by pups during cold exposure, whereas the 22 kHz vocalization is emitted by adults following ejaculation, following defeat in aggressive encounters, as well as in other contexts. Recent research suggests that the 40 kHz vocalization is the acoustic by-product of a respiratory mechanism that… CONTINUE READING