In this project, head-related transfer functions (HRTFs) are measured and prepared for localization tests with cochlear implant listeners. The method and apparatus used for the measurement is the same as used for the general HRTF measurement (see project HRTF-System); however, the place where sound is acquired is different. In this project, the microphones built into the behind-the-ear (BtE) processors of cochlear implantees are used. The processors are located on the pinna, and the unprocessed microphone signals are used to calculate the BtE-HRTFs for different spatial positions.
The BtE-HRTFs are then used in localization tests like Loca BtE-CI.