Efficient Individualization Method of HRTFs Using Critical-band Based Spectral Cue Control

Recently, 3-D audio technologies are commonly implemented through headphones. A major problem of the headphone-based 3-D audio is in-the-head localization, which occurs due to the inaccurate Head-Related Transfer Function (HRTF). Since the individual measurements of HRTFs are impractical, there have been several researches for HRTF customization. In this paper, an efficient method of customizing HRTFs for the sound externalization is proposed. Firstly, it is determined which part will be customized in HRTF through psychoacoustical experiments. Then, the method controlling spectral notches and envelopes to provide individual localization cues are described. Since the proposed method is based on a critical-band rate, the structure is much simpler than that of previous studies, but still effective. The performance was evaluated through a series of subjective tests, and the results confirmed that the customized HRTF using proposed method could replace the measured individual HRTF successfully.

[1]  Durand R. Begault,et al.  Auditory and Non-Auditory Factors that Potentially Influence Virtual Acoustic Imagery , 1999 .

[2]  F E Toole,et al.  In-head localization of acoustic images. , 1970, The Journal of the Acoustical Society of America.

[3]  Yuvi Kahana,et al.  Numerical Modelling of the Transfer Functions of a Dummy-Head and of the External Ear , 1999 .

[4]  A. J. Watkins,et al.  Psychoacoustical aspects of synthesized vertical locale cues. , 1978, The Journal of the Acoustical Society of America.

[5]  Shinji Hayashi,et al.  A clustering method for sound localization transfer functions , 1994 .

[6]  Anthony I. Tew,et al.  Spherical Harmonic Spectra of Head-Related Transfer Functions , 1997 .

[7]  David Griesinger,et al.  Binaural Techniques for Music Reproduction , 1990 .

[8]  W M Hartmann,et al.  On the externalization of sound images. , 1996, The Journal of the Acoustical Society of America.

[9]  V. Ralph Algazi,et al.  Physical and Filter Pinna Models Based on Anthropometry , 2007 .

[10]  Woon-Seng Gan,et al.  Direct Concha Excitation for Introduction of Individualized Hearing Cues , 2000 .

[11]  Søren Gert Weinrich.  Improved Externalization and Frontal Perception of Headphone Signals , 1992 .

[12]  Simon R. Oldfield,et al.  Detection and discrimination of spectral peaks and notches at 1 and 8 kHz. , 1989, The Journal of the Acoustical Society of America.

[13]  Toshiyuki Gotoh,et al.  On 'Out-of-Head Localization' in Headphone Listening , 1975 .

[14]  F L Wightman,et al.  Headphone simulation of free-field listening. I: Stimulus synthesis. , 1989, The Journal of the Acoustical Society of America.

[15]  Gary S. Kendall,et al.  The Decorrelation of Audio Signals and Its Impact on Spatial Imagery , 1995 .

[16]  Per Rubak,et al.  Headphone Signal Processing System for Out-Of-The-Head Localization , 1991 .

[17]  Ramani Duraiswami,et al.  Extracting the frequencies of the pinna spectral notches in measured head related impulse responses. , 2004, The Journal of the Acoustical Society of America.

[18]  Mark R. Anderson,et al.  Direct comparison of the impact of head tracking, reverberation, and individualized head-related transfer functions on the spatial perception of a virtual speech source. , 2001, Journal of the Audio Engineering Society. Audio Engineering Society.

[19]  Durand R. Begault,et al.  Perceptual Effects of Synthetic Reverberation on Three-Dimensional Audio Systems , 1992 .