Auditory arousal in preterm infants.

Auditory arousal was assessed in eleven preterm infants for two different signal spectra. The responsibility of these infants was compared to that previously determined for full term infants to the same signals. It was found that preterm infants respond more frequently than full term infants to both wide band and narrow band noises. Moreover, like the full term infants, the preterm infants respond to wide band signals more readily than to narrow band signals.