Anticipatory middle-ear reflex activity from noisy toys.
Middle-ear reflex activity was measured in 14 listeners in response to visual and acoustic exposure to each of seven noisy toys (such as a cap gun, party horn, cow bell, and so forth). Anticipatory middle-ear reflex (AMER) activity was a common occurrence. Normal middle-ear reflex generally occurred after the sound exposure. AMERs generally occurred in the two seconds prior to sound exposure but as early as 10 seconds before sound exposure. Loudness ratings and exposure SPLs were obtained. The presence of acoustically evoked middle-ear (ME) reflex activity and AMERs to the toys was generally unrelated to SPL or reflex threshold. Many reflex responses occurred in response to exposure SPLs below reflex threshold and with low anticipated loudness rating.
D001307:Auditory Perception; D002675:Child, Preschool; D004432:Ear, Middle / Q000502:physiology*; D006801:Humans; D009622:Noise; D010988:Play and Playthings; D012018:Reflex; D014796:Visual Perception