Head Diameter-Based ITD Reconstruction for Personalized Sound Localization

The patent changes the ITD parameter in the HRTF based on measured head geometry. Specifically, the system measures the listener's head diameter and ear positions, calculates the actual ITD from these measurements, and then modifies the generic HRTF by adjusting its embedded ITD value to match the calculated value. This parameter adaptation resolves the contradiction by maintaining system simplicity while achieving accurate sound localization for individual listeners.

The system performs self-measurement of head geometry using the audio system's own speakers and microphones. The method plays test signals through the speakers and has the listener provide verbal confirmation when hearing the signal at their ear, allowing the system to automatically calculate ITD and generate personalized HRTFs without external measurement equipment or expert intervention. This eliminates the need for complex measurement devices while achieving listener-specific sound localization.

The patent implements dynamic adaptation of HRTF parameters based on real-time head position tracking. The system continuously monitors head orientation and adjusts the HRTF application accordingly, ensuring that the sound pressure level remains consistent even when the listener moves their head. This dynamic adjustment maintains both universal applicability and reliability by adapting to each user's geometry and movements.