The effects of smoking and environmental temperature on temporary threshold shifts

Smoking and nonsmoking subjects were exposed either to 110- or 30-dB SPL white noise in both hot and cool ambient temperatures. Smokers evidenced less temporary threshold shift (TTS) than nonsmokers when exposed to loud noise. Nonsmokers evidenced greater TTS in the hot testing condition than in the cold condition when exposed to the loud noise. The temperature conditions did not influence the TTS of smokers. Smoking and the cold temperature both increased peripheral vasoconstriction.