Sound Crossword

a longitudinal wave that is caused by vibrations and that travels through a material medium
a wave in which the particles of thte medium vibrate paraell to the direction of wave motion
the extent to which a sound can be heard
the most common unit used to measure loudness
a measure of how high or low a sound is perceived to be, depending on the frequency of the sound wave
an observed change in the frequency of a of a wave when the source orobserver is moving
a reflected sound wave
the combination of two or more waves that results in a single wave
a phenomenon that occurs when two objects naturally vibrate at the same frequency; the sound produced by one object to vibrate
sound navigation and ranging, a system that uses acoustic signals and returned echoes to determine the location of objects or to communicate
sound waves with frequencies greater than 20,000 hertz , the upper limit of typical hearing levels in humans, often used for medical purposes
the process of using reflected sound waves to find objects; used by animals such as bats and dolphins