Understanding Sound Concepts

Front

Sound

Back

Vibration that travels through air or another medium

Front

Wavelength

Back

Distance between two consecutive crests or troughs in a wave

Front

Pitch

Back

Perception of frequency; high pitch = high frequency

Front

Decibel (dB)

Back

Unit to measure sound intensity

Front

Echo

Back

Reflection of sound waves off a surface

Front

Ultrasound

Back

Sound waves with frequencies above 20,000 Hz

Front

Doppler Effect

Back

Change in frequency due to motion of source or observer

Front

Resonance

Back

Amplification of sound when frequency matches natural frequency

Front

sonar

Back

sound navigation and ranging, a system that uses acoustic signals and returned echoes to determine the location