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Effect of Noise

Jiri Prazma, MD, PhD; Grayson K. Rodgers; Harold C. Pillsbury, MD

Arch Otolaryngol. 1983;109(9):611-615.

Abstract
• Cochlear blood flow as investigated in anesthetized gerbils exposed to high-frequency (10 to 40 kHz), high-intensity (113 dB sound pressure level noise for 13 minutes. Blood flow was measured using a newly developed technique, which combines the surface preparation dissecting of the cochlea with the microsphere method. Our experiments indicate that shortlasting, high-intensity noise exposure causes a highly significant elevation of the blood flow in noise-exposed inner-ear areas. On the exposed side, blood flow increase was observed in the first turn of the stria vascularis–suprastria and basilar membrane–lamina spiralis ossea. On the opposite side, which was exposed only through bone conduction, blood flow was significantly elevated only in the basilar membrane.

(Arch Otolaryngol 1983;109:611-615)

Author Affiliations
From the Department of Surgery, Division of Otolaryngology, University of North Carolina, Chapel Hill.

Footnotes
Accepted for publication Feb 3, 1983.

Read before the Association for Research in Otolaryngology meeting, St Petersburg, Fla, Jan 21, 1983.

Reprint requests to Department of Surgery-Otolaryngology, University of North Carolina at Chapel Hill, School of Medicine, 610 Burnett-Womack, 229H, Chapel Hill, NC 27514 (Dr Prazma).

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