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Questions and Answers

What is the term used to describe the quality or color of sound produced by instruments?

  • Amplitude
  • Pitch
  • Timbre (correct)
  • Frequency

Which of the following is NOT a factor that influences timbre?

  • Harmonics and overtones
  • Loudness of sound
  • Pitch of sound (correct)
  • Duration of sound

What is the typical sound level in a home?

  • 10-20 decibels
  • 50-60 decibels (correct)
  • 70-80 decibels
  • 30-40 decibels

What is the relationship between frequency and pitch?

<p>Higher frequency means higher pitch. (A)</p> Signup and view all the answers

What kind of sound wave is an ultrasound?

<p>High-frequency sound wave above human hearing range (B)</p> Signup and view all the answers

Which of the following is NOT a characteristic of sound waves?

<p>They can travel in a vacuum. (B)</p> Signup and view all the answers

What is the main application of sonar technology?

<p>Underwater navigation and mapping. (D)</p> Signup and view all the answers

Which of these is a common use of infrasound?

<p>Monitoring volcanic activity and detecting storms (D)</p> Signup and view all the answers

How does sound intensity relate to decibels?

<p>Decibels measure the loudness or intensity of sound. (D)</p> Signup and view all the answers

What is the phenomenon of sound waves bending around obstacles called?

<p>Diffraction (A)</p> Signup and view all the answers

Which of these is NOT a medium that sound can travel through?

<p>Vacuum (B)</p> Signup and view all the answers

What is the primary reason why sound travels faster through solids than through gases?

<p>Solids are more dense than gases. (B)</p> Signup and view all the answers

What is the term for the change in direction of sound waves as they pass from one medium to another?

<p>Refraction (A)</p> Signup and view all the answers

What happens to sound energy as it travels a long distance?

<p>The sound energy is partially absorbed or scattered, resulting in a decrease in intensity. (D)</p> Signup and view all the answers

Which of these is an example of a wave that exhibits crests and troughs?

<p>Transverse waves (B)</p> Signup and view all the answers

Which wave type can propagate through both solids and fluids?

<p>Longitudinal waves (C)</p> Signup and view all the answers

What characteristic of a sound wave primarily determines its pitch?

<p>Frequency of the sound wave (B)</p> Signup and view all the answers

How are frequency and wavelength related in sound waves?

<p>Inversely proportional in wave behavior. (C)</p> Signup and view all the answers

What does the amplitude of a sound wave measure?

<p>The height of the wave from rest position. (A)</p> Signup and view all the answers

What is the primary difference between amplitude and pitch in sound?

<p>Amplitude relates to loudness, pitch relates to frequency. (B)</p> Signup and view all the answers

Which characteristic of a sound wave is primarily associated with its timbre?

<p>The complexity of the sound wave's waveform. (D)</p> Signup and view all the answers

Flashcards

Sound Attenuation

The reduction in sound intensity as it travels through a medium.

Type of Sound Wave

Sound waves are classified as longitudinal waves.

Pitch Determinant

The pitch of a sound wave is determined by its frequency.

Amplitude Measurement

Amplitude measures the height of the wave from rest position.

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Frequency and Wavelength Relationship

Frequency and wavelength are inversely proportional in wave behavior.

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Wave Types Through Solids and Fluids

Longitudinal waves can move through both solids and fluids.

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Sound Timbre

Sound timbre is primarily associated with the quality of the sound.

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Higher Amplitude Effects

Higher amplitude results in louder sounds.

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Timbre

The quality or color of sound produced by instruments, influenced by harmonics and overtones.

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Typical Home Sound Level

The average sound level in a home, typically ranging from 70-80 decibels.

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Sound Level of Concerts

Concerts generally reach sound levels of 100-120 decibels.

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Ultrasound

High-frequency sound waves above the human hearing range, commonly used in medical imaging.

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Infrasound

Sound waves below the human hearing range, often used in monitoring natural phenomena.

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Nature of Sound

Sound is made of vibrations in a medium like air or water.

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Fastest Sound Travel

Sound travels fastest through solids, like metal.

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Measuring Sound Intensity

Sound intensity is measured in decibels.

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High-Frequency Sounds

High-frequency sounds have a higher pitch than low frequencies.

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Sound Transition Between Mediums

Refraction occurs when sound waves pass from air to water, changing speed and direction.

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Sound Wave Height

The height of a sound wave is defined by its amplitude.

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Distance Between Wave Crests

The distance between two sound wave crests is called wavelength.

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Sound Reflection Example

An echo from a canyon wall illustrates sound reflection.

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Study Notes

Sound Exam Study Notes

  • Sound is made of vibrations in a medium like air or water.
  • Sound does not travel through a vacuum (empty space).
  • Sound travels fastest through solids, then liquids, and slowest through gases.
  • Decibels measure sound intensity.
  • Higher-frequency sound has a higher pitch.
  • When sound waves move from one medium to another, refraction occurs (changes speed and direction).
  • Wavelength is the distance between two crests or troughs of a sound wave.
  • The amplitude of a sound wave determines its loudness.
  • Frequency is the number of waves passing a point per second, and is related to pitch.
  • Reflection of sound waves creates echoes.
  • Diffraction is the bending of sound waves around obstacles.
  • Attenuation is the reduction in sound intensity as it travels through a medium.
  • Sound energy is absorbed or scattered during attenuation.
  • Sound is a longitudinal wave.
  • Transverse waves have crests and troughs.
  • Light waves are an example of a transverse wave.
  • Longitudinal waves cause the medium to move back and forth parallel to the direction of the wave.
  • Sound waves can be used in medical imaging and underwater navigation.
  • The pitch of a sound is determined by the frequency of the sound wave.
  • Amplitude is related to the loudness of sound; larger amplitude equals louder sound.
  • Timbre (quality or color) is influenced by harmonics and overtones.
  • A home's typical sound level is 70-80 decibels.
  • Concerts can be 150-160 decibels.
  • A jet engine is around 110-120 decibels.
  • Ultrasound is a high-frequency sound wave above human hearing range and is used in medical imaging.
  • Infrasound is a sound below human hearing range and is used to detect storms.

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