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The present study examined the influence of subjective factors on temporary threshold shifts (TTS) after exposure to noise and music. Two groups of subjects, those who indicated liking and those who indicated disliking pop/rock music, were exposed to both noise and music on separate occasions. Subjects who liked the music exhibited less TTS following music(More)
The present investigation demonstrates the utility of the laser Doppler flowmeter to provide a measure of cochlear blood flow dynamics. Cochlear and cutaneous blood flow were compared with arterial blood pressure during and following exposure to Angiotensin II, 5% carbon monoxide, 100% oxygen, mannitol, and saline. The observations indicate that: 1)(More)
This study examined the noise level emitted by toys and recreational articles used by children and teenagers. The results indicate that many of the items tested emit sufficiently intense noise to be a source of noise induced hearing loss in school-age children. While the baby toys provided noise exposure within the limits of national regulations, they are(More)
Guinea pigs were exposed to 120 dB white noise for 30 min and evidenced a four-fold elevation in plasma concentration of the potent vasoconstricting hormone angiotensin II (AII). Anesthetized animals received intra-arterial injections of AII at doses that approximated the endogenous levels measured following noise exposure. A marked decrease in skin blood(More)
Significant plasma elevations of the powerful vasoconstrictor angiotensin II (AII) were measured in rats following exposure to either 100-dB or 20-dB SPL white noise in three environmental temperatures (5 degrees 21 degrees, and 38 degrees C). Loud noise exposure in the normal temperature condition (21 degrees C) and both temperature extremes with soft(More)
Anesthetized guinea pigs were given arterial bolus injections of saline or varying nicotine concentrations. Blood flow through the cochlea and skin were measured via laser Doppler and arterial blood pressure via an arterial cannula. Cochlear blood flow increased with low doses of nicotine but decreased with the highest dose, while blood pressure increased(More)
This study investigated blood pressure in guinea pigs while they were 1) alert and free moving, 2) anesthetized with different anesthetics, and 3) exposed to continuous, 115 dB SPL white noise under anesthesia. The animals were prepared with a carotid artery catheter and permitted to recover for 48 h before blood pressure levels were measured. Mean arterial(More)
Plasma concentrations of the vasoconstrictor Angiotensin II (AII) were measured in male human subjects before and after either rest or exposure to 100-dB white noise. Plasma AII concentrations decreased for subjects in the control (no noise) condition but remained high in the noise condition. In the noise exposure condition both the pre- and post-exposure(More)
This paper compiles the results from seven experiments which have investigated noise exposure effects on histological measures of the cochlear vasculature and red blood cells. Two of these studies included at least two experimental conditions and all evaluated numerous histological parameters in several cochlear vessels. The combined results suggest that(More)