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14.10: End of Chapter Key Terms

Last updated

Aug 30, 2024
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- 14.9: End of Chapter Activity
- 15: Electromagnetic Radiation

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Definition: Property of Sound, Doppler Effect & Interferences

Sound: the transfer of energy from a vibrating object in waves that travel through matter.
Speed of Sound: The speed at which sound waves travel through a medium, influenced by the medium’s properties (e.g., temperature, density).
Sound Wave: A mechanical wave that propagates through a medium (such as air, water, or solids) by the vibration of particles.
Loudness: The perceived intensity or volume of a sound, related to the amplitude of the sound wave.
Intensity: measure of the amount of energy in sound waves.
Decibel (dB): A logarithmic unit used to measure the intensity of sound, representing the ratio of a particular sound pressure to a reference level.
Amplitude: The maximum displacement of particles in the medium from their rest position, related to the loudness of the sound.
Frequency: The number of vibrations or cycles per second of a sound wave, measured in hertz (Hz), determining the pitch of the sound.
Pitch: The perceived frequency of a sound; higher frequencies are heard as higher pitches, and lower frequencies as lower pitches.
Wavelength: The distance between successive crests or troughs of a sound wave, determining its spatial period.
Ultrasound: Sound waves with frequencies above the upper limit of human hearing (>20,000 Hz), used in medical imaging and industrial applications.
Infrasound: Sound waves with frequencies below the lower limit of human hearing (<20 Hz), often produced by natural phenomena like earthquakes.
Doppler Effect: The change in frequency or wavelength of a sound wave as the source and observer move relative to each other, resulting in a perceived change in pitch.
Redshift (Sound): The decrease in frequency (and increase in wavelength) of a sound wave as the source moves away from the observer.
Blueshift (Sound): The increase in frequency (and decrease in wavelength) of a sound wave as the source moves toward the observer.
Echolocation: The use of reflected sound waves to determine the location of objects, used by animals such as bats and dolphins.
Sonar: A technique that uses sound waves to detect and locate objects underwater.

Definition: Property of Sound, Doppler Effect & Interferences

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