To restore knowledge from silence you must need to increase hearing capacity, Ears can only detect sound between 20 Hz-20Khz. So much going around beyond that frequency & neither we can hear, nor we are ever tried, even many people can and they have an access onto those objects.
Often, I wish to . . say the unsaid, hear the unheard see the unseen, touch the untouched, feel the unfelt explore the unexplored, . . Yes, Often I wish to go for long-holidays.