P1.5.6 Sound + P1.5.7 Musical Sounds 0.0 / 5 ? PhysicsWavesGCSEAQA Created by: MaddiCreated on: 30-04-14 16:27 What range of frequencies can be detected by the human ear? The frequency range of the normal human ear is from about 20 Hz to 20000 Hz. 1 of 6 What are sound waves? Sound waves are vibrations that travel through a medium (substances). They cannot travel through a vacuum. 2 of 6 What are echoes? Echoes are due to sound waves reflected from a smooth, hard surfaces. 3 of 6 What determines the pitch of a note? The pitch of a notes increases if the frequency of the sound waves increases. 4 of 6 What happens to the loudness of a notes as the amplitude increases? The loudness of a note increases if the amplitude of the sound wave increases. 5 of 6 How are sound waves created by musical instruments? Vibrations created in an instrument when it is played produce sound waves. 6 of 6
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