2.4. Contralateral suppression of OAE (CLS OAE) tests
This protocol is extracted from research article:
Evaluation of cochlear functions in infants exposed to SARS-CoV-2 intrauterine
Am J Otolaryngol, Feb 18, 2021; DOI: 10.1016/j.amjoto.2021.102982

TEOAE test parameters were used for the measurement of CLS with TEOAE test. Measurement was done bilaterally. A linear click TEOAE stimulus with an intensity of 80 ± 3 dB SPL was given from one ear, and a 60 dB SPL white noise was delivered to the contralateral ear in linear stimulus mode for efferent auditory system suppression and TEOAE recording repeated. A contralateral white noise stimulus was formed by the same audiometer and delivered by insert earphones. TEOAE responses were compared with the contralateral suppression responses by measuring them binaurally. Signal, noise and S/N-R values of both tests were examined as study parameters. Signal and S/N-R suppression amplitude were calculated by subtracting the TEOAE results detected in the presence of noise from the TEOAE responses recorded under silent condition. Those with positive suppression amplitudes were classified as ‘there is suppression’ and those with negative values were classified as ‘no suppression’. The frequency of the signal suppressions for each patient was calculated.

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