One of my students, who has now become an instructor, when he lost his vision, after a few months he was sitting in his three story house and he realized that he could hear everything going on throughout the house: conversations, people in the kitchen, people in the bathroom, several floors away, several walls away.
Uno de mis estudiantes, que ahora es instructor, al perder su visión, tras unos meses, estaba sentado en su casa de 3 pisos y se dio cuenta de que podía oír todo lo que sucede en toda la casa: conversaciones, la gente en la cocina, en el baño, a varios pisos de distancia, a varios muros de distancia.