Fig. 1. Construction idea of sound field reconstruction model

Fig. 2. Kirchhoff integral region setting

Fig. 3. Kirchhoff integral theorem for plane diffraction

Fig. 4. Verification of sound field boundary extension method. (a) Simulation of 0.2 m×0.2 m range sound field; (b) simulation of 0.26 m× 0.26 m range sound field; (c) 0.26 m×0.26 m range sound field obtained by boundary extension for the sound field Fig.4(a)

Fig. 5. Simulated acoustic hologram comparison. (a) Simulated three-dimensional sound field; (b) acoustic holography by 0.2 m×0.2 m sound field; (c) acoustic holography by 0.26 m×0.26 m sound field; (d) acoustic holography after LPBP

Fig. 6. PSNR of acoustic holography obtained by three methods

Fig. 7. Effect of light power on output signal of PSD

Fig. 8. Schematic of experimental apparatus

Fig. 9. Experimental flow chart

Fig. 10. Result of sound field reconstruction. (a) Sound pressure reconstruction results; (b) sound pressure gradient field reconstruction results

Fig. 11. Comparative analysis of sound pressure in reconstructed sound field. (a) Sound field analysis section and point location diagram; (b) spatial cross-section sound pressure of sound field at each time; (c) variation of sound pressure at six specific points in the sound field over time

Fig. 12. Near field acoustic hologram scene

Fig. 13. Comparison of measurement sound field and holographic sound field. (a) Measuring sound field; (b) direct acoustic holography; (c) acoustic holography after LPBP

Fig. 14. Comparison of measured sound pressure value and holographic sound pressure value

Fig. 15. Acoustic hologram result of measuring sound field. (a) Acoustic holography after LPBP; (b) direct acoustic holography