An acoustic mirror is a passive device used to reflect and perhaps to focus (concentrate) sound waves.
Read more about Acoustic Mirror: Acoustic Aircraft Detection, Modern Uses, Locations
Famous quotes containing the word mirror:
“I have had no other treasure in this world than to see you once perfect and complete, as much in virtue, honesty and wisdom, as in all free and honest learning, and so leave you after my death like a mirror representing my person—your father—if not as excellent in fact as I would wish, certainly so in desire.”
—François Rabelais (1494–1553)