Title page for ETD etd-10112011-224056


Type of Document Master's Thesis
Author Hughet, James
Author's Email Address hughet@vt.edu
URN etd-10112011-224056
Title Binaural Hearing Effects of Mapping Microphone Array’s Responses to a Listener’s Head-Related Transfer Functions
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Roan, Michael J. Committee Chair
Burdisso, Ricardo A. Committee Member
Papenfuss, Cory M. Committee Member
Keywords
  • Binaural Hearing
  • HRTF Matching
  • Array Processing
  • Listener Test
  • Head-Movement
  • Transplant Hearing
Date of Defense 2011-09-29
Availability unrestricted
Abstract
This thesis focuses on the mapping of the microphone array’s response to match the characteristics of a human subject’s Head-Related Transfer Function (HRTF). The mapping of the response is first explored with a ‘monaural HRTF matching’ that filters the response independent of the arrival angles. For arbitrary array geometry with the listener external to the acoustic, the monaural HRTF matching did not provide listeners with enough spatial information to precisely localize sound sources. To correct this, a preprocessor control algorithm was added to the HRTF matching, a ‘binaural HRTF matching’ process. The binaural HRTF matching increased the listeners’ performance in perceiving the location of a sound source. With the addition of simulated head movement, the listeners’ perception increased by 20%. An issue with this approach is the use of HRTFs other than the listeners’ measured HRTF, creating a psychoacoustic based error in localization, i.e., front/back confusion.
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