Comparison of measured head-related transfer functions using spatio-temporal frequency analysis.
Yasuko Morimoto, Takanori Nishino, Kazuya Takeda · The Journal of the Acoustical Society of America · 2009
We make a comparison of measured head-related transfer functions (HRTFs) in spatio-temporal frequency domain. An HRTF is an acoustic transfer function between a sound source and the ear canal entrance, and defined as a function on time and space. The spatio-temporal frequency characteristics can be visualized and analyzed by showing the spectrum computed by multidimensional Fourier transform on time and space. In our experiments, we investigated the basic property of the spatio-temporal frequency characteristic and the difference between all data for the HRTFs obtained by numerical analysis and actual measurements. The reverberation and HRTF individuality were also examined. From the results, the characteristics were mostly concentrated in a specific band frequency, and there were also differences among databases.