Echoes Reflections or repetitions of sound waves. Echoes can be produced and heard by clapping hands or shouting in a large empty room with hard walls or in a cave for example.
Acoustical Society of America
Suite 1NO1 2 Huntington Quadrangle Melville, NY 11747-4502 Phone: (516) 576-2360 Fax: (516) 576-2377 email: asa@aip.org
