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Explore spatial audio fundamentals and binaural synthesis techniques in this 27-minute conference talk from ADCx India 2025. Learn how humans perceive sound location through binaural audio signals and discover the mechanisms behind spatial localization in both free field and closed field environments. Understand the role of static and dynamic cues, human ear anatomy's effect on pressure waves, and psychological factors in sound perception. Master the reproduction of binaural audio on headphones through Head Related Transfer Functions (HRTFs) for near field and far field signals, including spectrum modifications, channel delaying techniques to replicate intra-aural delay, and methods for replicating energy level changes in audio signals. Gain practical insights into implementation challenges and solutions, including interpolation tricks between fixed HRTFs for smooth transitions. The presentation covers essential terminology, basic pressure wave equations, and provides comprehensive coverage of spatial audio technology applications in virtual reality, home theaters, and spatial audio headphones.
