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Sound Waves Quiz

Sound Waves Quiz

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Questions and Answers

What are the major requirements for the production of sound?

Material medium
Vibrations
Both A and B (correct)
None of the Above

Which of the following is NOT a way to produce sound?

Strike a drum
Tap a tuning fork
Rub a balloon on hair (correct)
Pluck a guitar string
Blow on a flute

Sound can travel through a vacuum.

False (B)

A material medium is required for the propagation of sound.

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

What kind of wave is sound?

<p>Longitudinal wave</p> Signup and view all the answers

What type of motion is present when sound is produced?

<p>Vibrations</p> Signup and view all the answers

What is the term used for the sound that is heard after an interval of silence?

<p>Echo.</p> Signup and view all the answers

What happens to the air particles near a source of sound?

<p>They are compressed.</p> Signup and view all the answers

What is the term used for the repeated sound that is heard after an interval of silence, and is due to multiple reflections of sound waves?

<p>Reverberation.</p> Signup and view all the answers

What is the name of the process by which sound travels in a medium?

<p>Propagation.</p> Signup and view all the answers

The speed of sound remains constant, regardless of the medium.

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

How do dolphins communicate with each other underwater?

<p>They use sound.</p> Signup and view all the answers

Flashcards

What causes sound?

A to-and-fro motion that is the source of all sound.

What is a sound wave?

A series of compressions and rarefactions that travel through a medium.

What is the wavelength of a sound wave?

The distance between two successive compressions or rarefactions in a sound wave.

What is the frequency of a sound wave?

The number of compressions or rarefactions that pass a point per second.

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What is the speed of sound?

The speed at which sound travels through a medium. It is affected by the properties of the medium.

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What is an echo?

A phenomenon where sound waves bounce off a surface and are reflected back to the listener, creating a distinct sound.

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What is reverberation?

Multiple reflections of sound waves within a space, causing a prolonged sound effect.

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What is diffraction of sound?

The ability of sound waves to bend around obstacles.

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What is pitch?

How high or low a sound is perceived to be. It is determined by the frequency of the sound wave.

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What is loudness?

The intensity of a sound wave. It is determined by the amplitude.

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What is timbre?

The unique quality of a sound that distinguishes it from other sounds with the same pitch and loudness. It is determined by the combination of frequencies in the sound wave.

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What is a decibel (dB)?

A unit used to measure the intensity of sound.

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What is ultrasound?

Sound waves with frequencies above the human audible range, typically above 20 kHz.

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What is sonar?

A technique that uses sound waves to locate and identify objects underwater. It is used by ships and submarines for navigation, communication, and detection.

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How does sound travel through air?

Vibrations that cause the surrounding air molecules to vibrate, creating compressions and rarefactions.

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Why can you hear someone talking from a distance?

The spreading out of sound waves as they travel.

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Why can't you hear sound in space?

Sound cannot travel through a vacuum because there are no particles to vibrate.

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How does the speed of sound change in different mediums?

Sound travels faster through solids than through liquids, and faster through liquids than through gases.

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What is the reflection of sound?

The reflection of sound waves from a surface. The angle of incidence is equal to the angle of reflection.

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How does temperature affect the speed of sound?

Sound travels faster in warmer air because the particles move faster and collide more frequently.

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What is refraction of sound?

The phenomenon where sound waves are bent as they pass from one medium to another.

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What is a loudspeaker?

A device that converts electrical signals into sound waves, producing audible sound.

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What is a microphone?

A device that converts sound waves into electrical signals.

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What is a frequency meter?

A device used to measure the frequency of sound waves.

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What is ultrasound used for?

A high-frequency sound wave that is used in many applications, such as medical imaging, cleaning, and testing.

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What is ultrasound imaging?

The process of creating a visual representation of internal structures using sound waves.

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What is lithotripsy?

The use of sound waves to break up kidney stones, gallstones, and other mineral deposits.

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What is sound pollution?

Sound pollution is noise that is harmful or unpleasant to humans and the environment.

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What is the range of human hearing?

The human ear is designed to hear a specific range of frequencies, typically between 20 Hz and 20,000 Hz.

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How does noise affect hearing?

The phenomenon where prolonged exposure to loud noise can damage the hair cells in the inner ear, causing hearing loss.

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What is acoustics?

The study of sound, its production, transmission, and effects.

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Study Notes

Sound Waves

Sound is produced by vibrations
The major requirement for sound production is vibration
Vibrations cause compressions and rarefactions
The tuning fork, string, drum skin, and a person's vocal cords produce sound
The loud speaker creates sound with the vibrations from the cone
Sound waves are longitudinal waves
Sound travels through a medium (solid, liquid, or gas)
Sound cannot travel through a vacuum
The direction of vibration is parallel to direction of wave movement
Sound waves move through the air as longitudinal waves, thus causing alternating compressions and rarefactions in the air
When the diaphragm moves outward, a compression forms.
When the diaphragm moves inward, a rarefaction forms.
Sound is produced by the loud speaker in a diaphragm movement
These compressions and rarefactions move through the air, causing the flame to move forward and backward
The particles get closer to each other when a compression happens, they spread out during rarefaction.
Sound waves travel faster in a medium where the particles are closer together.

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