Venkatarangan writes at his blog..
Listen to Mona Lisa
What will her voice sound like - it was everyone's imagination when they see Leonardo Da Vinci's Mona Lisa Portrait. Now that puzzle has been solved by a Japanese Scientist "Dr.Matsumi Suzuki". Based on her perceived Height, Facial Dimensions, he claims to have produced to 90% accuracy of how Mona Lisa's voice would have sounded. If you want to hear it, go to Mona Lisa Speaks site. Dr.Suzuki also explains his method in the video. Only downside all of this is in Japanese.