Basics of Sound for Grade 8

Front

Sound

Back

Vibration of particles

Front

Frequency

Back

Hertz (Hz)

Front

Amplitude

Back

Loudness

Front

Pitch

Back

High or low sound

Front

Decibel

Back

Sound intensity unit

Front

Echo

Back

Reflected sound wave

Front

Ultrasound

Back

Above human hearing range

Front

Infrasound

Back

Below human hearing range

Front

Speed of Sound

Back

343 m/s in air

Front

Timbre

Back

Sound quality or tone