TEOAE Measurement Module FAQ
Q: How often do I need to run the In-The-Ear calibration?
A: You need to run the In-The-Ear calibration before each measurement.
Q: How do I export TEOAE data for use in Matlab?
A: To export TEOAE data to a Matlab mat file, please see Section 2.6.7 in the TE Manual. The resulting *.mat file has the structure "res", the details of which are specified in Appendix B of the manual. The data generated by this operation is identical to the displayed data. An alternative is to export the raw (unprocessed) buffers to a txt file, the details of which are also in Section 2.6.7. This option is preferred if you wish to completely reprocess the measurement using your own response filter and window. The current version of HearID allows only for manual export of TEOAE measurements individually.
The TestHistory table in the HearID database contains the filename for the original TEOAE measurement (saved in a binary format as a *.tdt file). When the data are exported, the same file prefix is used and a datetime stamp is added. For instance 0022_R_TEOAE_20070327110602.tdt is exported as 0022_R_TEOAE_20070327110602_data_20070327T115128.mat. To fully exploit the information contained in the HearID database, use the database toolbox in Matlab to query the HearID database for the filenames (and any other relevant information, like PatientID, ear, etc.) and use regexprep to generate the filenames of the exported file (with a * for the unknown datetime stamp: 0022_R_TEOAE_20070327110602*.mat), then use "dir" to find all files matching that name.
