Research of 3D Virtual Sounds in Cockpit: Calculation, Measurement, and Individuation Customization in Aviators’ HRTFs

Abstract

Acoustical display in cockpit is an effectual means to reduce potential aviators’ visual load in traditionary cockpit. The 3D virtual sounds, including spatial positioning information and displaying by headphone, adapt sufficiently for acoustical display in limited cockpit space. In order to improve cockpit acoustical display level and synthesize cockpit 3D virtual sounds, we exploringly research the key foundation of cockpit acoustical display which is aviators’ head-related transfer functions (HRTFs) calculation, measurement, and individuation customization. First, the importance of HRTFs in 3D virtual sounds is analyzed based on the binaural acoustical model and then summarized the calculation, measurement, and individuation customization methods of HRTFs. Second, the primary research of aviators’ HRTFs measurement is brought forward according to demand of cockpit acoustical display, designed the free acoustic fields environment and aviators’ HRTFs measurement system. Finally, the individuation customization methods of aviators’ HRTFs are investigated based on physiological parameter matching in aviators’ HRTFs measurement system.