title: Auditory effects of noise on infant and adult guinea pigs.
abstract: This pilot study compared the susceptibility of the infant (48 hr) and adult (120 days) guinea pig to the effects of noise. Subjects were exposed to a narrow band of noise (center frequency 4 kHz) at an intensity of 115 dB sound pressure level (SPL) for 1 hr. Postexposure thresholds were obtained by a conditioned suppression technique. Results indicated that the infant animals displayed a mean hearing threshold of 25 dB SPL that significantly differed from the adult mean threshold of 7.5 dB SPL.
mesh_terms: D000375:Aging; D000818:Animals; D001309:Auditory Threshold; D006168:Guinea Pigs; D009622:Noise / Q000009:adverse effects*