sound Flashcards
What is sound?
Sound is a form of energy that is produced by vibrating objects and travels through a medium.
True or False: Sound can travel through a vacuum.
False
What are the three characteristics of sound?
Loudness, pitch, and quality.
Fill in the blank: The unit of frequency is __________.
Hertz (Hz)
What determines the pitch of a sound?
The frequency of the sound wave.
What is loudness measured in?
Decibels (dB)
True or False: Higher frequency results in a lower pitch.
False
What is the speed of sound in air at room temperature?
Approximately 343 meters per second.
What do we call the distance between two consecutive compressions in a sound wave?
Wavelength.
Multiple choice: Which of the following materials conducts sound best? A) Air B) Water C) Steel D) Vacuum
C) Steel
What is an echo?
An echo is the reflection of sound that arrives at the listener after a delay.
Fill in the blank: The phenomenon of sound bending around obstacles is called __________.
Diffraction.
What is the relationship between frequency and wavelength?
They are inversely related; as frequency increases, wavelength decreases.
True or False: Sound waves are longitudinal waves.
True
What is the range of human hearing in Hertz?
20 Hz to 20,000 Hz (20 kHz)
What is the term for the quality of sound that distinguishes different types of sound production?
Timbre.
Multiple choice: Which instrument produces sound by vibrating strings? A) Flute B) Drum C) Violin D) Trumpet
C) Violin
What happens to sound as it travels through different media?
Its speed and wavelength change, but frequency remains constant.
Fill in the blank: The phenomenon where sound waves combine to form a louder or softer sound is called __________.
Interference.
What is the effect of temperature on the speed of sound?
The speed of sound increases with an increase in temperature.
True or False: Sound can travel faster in solids than in liquids.
True
What is resonance?
Resonance is the amplification of sound due to matching frequency of external vibrations.
What is the main component of sound waves?
Vibrations of particles in a medium.
Multiple choice: Which of the following is not a property of sound? A) Reflection B) Refraction C) Magnetism D) Diffraction
C) Magnetism
