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MOCR on HearID

Example MOCR test results
HearID+MOCR screenshot, showing an example MOCR test series. On the left are the TEOAE results with and without the contralateral broadband noise elicitor. On the right is the derived MOCR strength.

CAS add-on

Also available for the TE and SF Modules for research users is a contralateral elicitor add-on (MOCR module customers get this add-on for free). The add-on generates digital broad-band noise or a tone, synchronizes the output with the SFOAE measurement (including programmable on and offset delays), and automatically saves the data files with a common file prefix. The benefit to using the add-on is that test sequences can be highly customized, but there is no real-time display of the MOCR results or any data analysis. This add-on is software only - a suitable sound card and calibrated earphone must be purchased or acquired separately.

Resources

Manuals

Further Reading

A Clinically Viable Medial Olivocochlear Reflex Assay Using Transient-Evoked Otoacoustic Emissions. by Lapsley Miller, J. A., Reed, C. M., Marshall, L., Perez, Z. D., and Villabona, T. (2023). Ear Hear., Online Ahead of Print.

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Marshall, L., Lapsley Miller, J. A., Guinan, J. J., Shera, C. A., Reed, C. M., Perez, Z. D., Delhorne, L. A., and Boege, P. (2014). "Otoacoustic-emission-based medial-olivocochlear reflex assays for humans," J. Acoust. Soc. Am. 136, 2697-2713.

Lapsley Miller, J. A., Marshall, L., Reed, C. M., Perez, Z. D., and Villabona, T. (2021). Refining the procedures for medial-olivocochlear reflex (MOCR) assays: decreasing the contralateral noise reset time below 10 seconds can affect subsequent transient-evoked otoacoustic emission (TEOAE) measurements (NSMRL Technical Report No. 1344). Groton, CT: Naval Submarine Medical Research Laboratory.

Lapsley Miller, J. A., Marshall, L., Reed, C. M., and Villabona, T. (2021). Effects of stopping rules, stimulus levels, and ear laterality on transient-evoked otoacoustic emission (TEOAE)-based assays of the medial-olivocochlear reflex (MOCR) (NSMRL Technical Report No. 1346). Groton, CT: Naval Submarine Medical Research Laboratory.

Lapsley Miller, J. A., Marshall, L., Reed, C. M., and Perez, Z. D. (2021). Otoacoustic Emission (OAE) Based Assays of the Medial Olivocochlear Reflex (MOCR): Ensuring the OAE Stimulus Does Not Cause a Confounding MOCR (NSMRL Technical Report No. 1345). Groton, CT: Naval Submarine Medical Research Laboratory.