Wa. Harrison et Em. Burns, EFFECTS OF CONTRALATERAL ACOUSTIC STIMULATION ON SPONTANEOUS OTOACOUSTIC EMISSIONS, The Journal of the Acoustical Society of America, 94(5), 1993, pp. 2649-2658
Spontaneous otoacoustic emissions (SOAEs) were measured in the ear can
al of adult humans prior to, during, and following presentation of ton
al and broadband stimuli to the contralateral ear. Tones were presente
d at a fixed level at ten frequencies relative to the SOAE. Broadband
noise was presented at eight levels, from 6 to 76 dB SPL. Shifts in SO
AE frequency and amplitude were observed for some subjects, for some t
one conditions. Frequency shifts were always positive, whereas amplitu
de shifts were variable. No apparent pattern of tuning was seen, such
that tones with a particular frequency relationship to the SOAEs induc
ed greater changes in the SOAEs. Systematic changes in frequency and a
mplitude of SOAEs were observed for increasing level of broadband nois
e for all subjects. Results are discussed with respect to possible mec
hanism(s) responsible for the alterations in SOAEs: Transcranial condu
ction; the olivocochlear system; and/or the middle-ear reflex arc.