Preliminary Observations on the Effects of Exposure to Noise for Seven Days on the Hearing and Inner Ear of the Chinchilla

James D. Miller, Stephan J. Rothenberg, Donald H. Eldredge

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Growth and decay of temporary threshold shifts (TTS), small permanent threshold shifts (PTS), and cochlear injury are described for two chincillas exposed to an octave band of thermal noise (0.3–0.6 kHz) at a sound-pressure level (SPL re 0.0002 μbar) of 100 dB for seven days. TTS grew with the duration of the exposure for 24–48 h and remained constant thereafter. After termination of the exposure, TTS decayed slowly and reached near-zero values in about five days. Three months after exposure there were small PTSs (less than 10 dB) for some test tones, reduced cochlear potentials, and clear losses of external hair cells in the second and third turns of the cochlea. Observations of TTS for identical exposures limited to a duration of 193 min are also described.

Original languageEnglish
Pages (from-to)1199-1203
Number of pages5
JournalJournal of the Acoustical Society of America
Volume50
Issue number4B
DOIs
StatePublished - Oct 1971

Fingerprint Dive into the research topics of 'Preliminary Observations on the Effects of Exposure to Noise for Seven Days on the Hearing and Inner Ear of the Chinchilla'. Together they form a unique fingerprint.

Cite this