Questions and Answers
A tone that is lower in pitch is lower in what characteristic?
If the wave speed stays the same, which of the following decreases as the frequency increases?
What part of the ear is damaged most easily by continued exposure to loud noise?
What is an echo?
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What happens to the note being played when a trumpeter depresses keys to make the column of air resonating in the trumpet shorter?
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What happens to a note being played on a violin when a string is tightened?
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As air becomes warmer, how does the speed of sound in air change?
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Sound waves are which type of wave?
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What does the middle ear do?
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An ambulance siren speeds away from you. What happens to the pitch of the siren?
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Study Notes
Sound Characteristics
- A tone with a lower pitch correlates with a lower frequency.
- As frequency increases, wavelength decreases if wave speed remains constant.
- Continued exposure to loud noise most easily damages hair cells in the ear.
Echo and Sound Behavior
- An echo is the result of reflected sound waves.
- Shortening the column of air in a trumpet lowers the pitch of the note being played.
- Tightening a violin string raises the pitch of the note being played.
Speed of Sound
- Sound speed in air increases with temperature.
- Sound waves are classified as compressional waves.
Middle Ear Function
- The middle ear transmits and amplifies sound vibrations to the inner ear.
Doppler Effect and Diffraction
- The Doppler effect causes a change in frequency based on the relative motion between the sound source and listener.
- Diffraction refers to sound waves bending around obstacles or spreading when passing through openings.
Loudness and Pitch
- Loudness reflects the human perception of sound wave energy.
- Pitch increases with rising frequency of the sound.
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Description
This enhancement activity focuses on the fundamental concepts of sound. Participants will complete a concept map and answer questions related to sound, helping to reinforce their understanding of sound principles. Ideal for students looking to deepen their knowledge in physics, specifically in the area of acoustics.
