Wave produced by vibrations that can travel through a medium.
Rapid back-and-forth motion.
Space with few or no particles where sound can't travel.
Highness or lowness of sound; higher frequency = higher pitch.
Unit to measure frequency.
Sound with frequency higher than 20,000 hertz.
Strengthening of a sound wave when it combines with an object's natural vibration.
Change in pitch that occurs when the source or hearer is moving.
Amount of energy a sound wave has (loudness).
Unit to measure intensity of a sound wave.
Increasing the strength of an electrical signal to increase intensity (loudness) of a sound.
Scientific study of sound.
Finding location by sending out ultrasound waves and interpreting the returning echoes.
Instuments that use echolocation to locate objects under water.