Inner ear damage due to leisure and broadband noise. An experimental study on initial and permanent functional and morphological damage

The initial and permanent effects of leisure noise (toy pistols, rock music) compared to broadband noise were examined in 68 guinea pigs. Auditory threshold shifts at 1.5, 2, 3, 4, 6, 8, 12 und 16 kHz were registered before and immediately after exposure as well as on days 1, 2, 3, 5,7 and 21 post-e...

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Veröffentlicht in:	HNO 2004-04, Vol.52 (4), p.301
Hauptverfasser:	Lamm, K, Michaelis, C, Deingruber, K, Scheler, R, Steinhoff, H-J, Gröber, I, Huth, M, Kutscher, C, Arnold, W
Format:	Artikel
Sprache:	ger
Schlagworte:	Acoustic Stimulation - methods Adaptation, Physiological - physiology Animals Audiometry, Pure-Tone - methods Auditory Threshold Cochlea - pathology Cochlea - physiopathology Environmental Exposure - adverse effects Guinea Pigs Hearing Loss, Noise-Induced - etiology Hearing Loss, Noise-Induced - physiopathology Hearing Loss, Noise-Induced - rehabilitation Leisure Activities Music Noise - adverse effects Recovery of Function - physiology
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Zusammenfassung:	The initial and permanent effects of leisure noise (toy pistols, rock music) compared to broadband noise were examined in 68 guinea pigs. Auditory threshold shifts at 1.5, 2, 3, 4, 6, 8, 12 und 16 kHz were registered before and immediately after exposure as well as on days 1, 2, 3, 5,7 and 21 post-exposure using the auditory brain stem response (ABR) technique. In order to examine cilia and hair cell damage in eight cochlear frequency regions (26 kHz), cytocochleograms were performed immediately after exposure and on days 1, 7 and 21.Frequency dependent functional or morphological damage was found which depended on the type of trauma tested. All results were highly significant ( P
ISSN:	0017-6192