Do Audible and Ultrasonic Sounds of Intensities Common in Animal Facilities Affect the Autonomic Nervous System of Rodents?
In animal facilities, noises, often poorly controlled, occur over a wide range of frequencies and intensities. Evidence demonstrates that audible noise and ultrasound have deleterious effects on rodent physiology, but it is not known how they affect the autonomic nervous system (ANS). This study exposed 3 unrestrained, male, Sprague-Dawley rats daily to a 15-min white […]
Noise-dependent vocal plasticity in domestic fowl
Since acoustic communication is considerably constrained by environmental noise, some animals have evolved adaptations to counteract its masking effects. Humans and New World monkeys increase the duration of brief vocalizations (below a few hundred milliseconds) as the background noise level rises, a behaviour that increases the detection probability of signals in noise by temporal summation. […]
Great tits in urban noise benefit from high frequencies in song detection and discrimination
Field studies in urban environments have shown that birds sing with higher frequencies in response to noise, but so far there are no perceptual data showing benefits of high-frequency songs over lowfrequency songs under typical urban noise conditions. In this study we investigated the potential effects of specific frequency use in different environments on the […]