Abstract
Affecting the ear‐canal impedance by inserting a microphone produces considerable changes in the directional characteristics of the ear with increasing frequency. Head‐related transfer functions (HRTFs) are measured in the horizontal and median plane under systematic change of the ear‐canal microphone more or less blocking the ear‐canal entrance. A microphone arrangement is developed which minimizes the influence on the given impedance of the ear canal entrance. New measurements of HRTFs are reported and compared with well‐known literature results. The "undisturbed" HRTFs serve as objective functions for a microphone array which substitutes the dummy head in head‐related (stereophonic) recordings. The (complex) objective functions are modified for the microphone array according to the relevance in directional hearing.
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