sound rev Flashcards
What is sound?
Sound is a form of energy that travels in waves and is produced by vibrating objects.
True or False: Sound can travel through a vacuum.
False
What medium is required for sound to travel?
Sound requires a medium such as air, water, or solids to travel.
Fill in the blank: The speed of sound in air is approximately _____ m/s.
343
What is the frequency of a sound wave?
The frequency of a sound wave is the number of vibrations or cycles per second, measured in Hertz (Hz).
What is the relationship between frequency and pitch?
Higher frequency corresponds to a higher pitch, while lower frequency corresponds to a lower pitch.
What is amplitude in the context of sound waves?
Amplitude is the maximum displacement of particles from their rest position in a sound wave, related to the loudness of the sound.
True or False: Sound waves are longitudinal waves.
True
What is the range of human hearing in terms of frequency?
The range of human hearing is approximately 20 Hz to 20,000 Hz.
What is an echo?
An echo is a reflection of sound that arrives at the listener after a delay.
Fill in the blank: The phenomenon of sound bending around obstacles is known as _____.
diffraction
What is the unit of sound intensity?
The unit of sound intensity is the Watt per square meter (W/m²).
What does the term ‘decibel’ represent?
Decibel (dB) is a logarithmic unit used to measure the intensity of sound.
What is the Doppler effect?
The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.
True or False: Sound travels faster in solids than in liquids.
True
What is resonance?
Resonance is the phenomenon that occurs when an object vibrates at its natural frequency due to external vibrations.
Fill in the blank: The maximum displacement of a sound wave is called its _____.
amplitude
What is the formula for calculating the speed of sound?
The speed of sound can be calculated using the formula v = f × λ, where v is speed, f is frequency, and λ is wavelength.
What type of wave is sound classified as?
Sound is classified as a mechanical wave.
True or False: The loudness of sound is directly related to its amplitude.
True
What is a sonic boom?
A sonic boom is the sound associated with the shock waves created when an object travels through the air at a speed faster than the speed of sound.
What is the typical frequency range of a dog’s hearing?
The typical frequency range of a dog’s hearing is 40 Hz to 60,000 Hz.
What happens to sound waves as they travel further from the source?
As sound waves travel further from the source, they lose energy and become quieter.
What is the effect of temperature on the speed of sound?
The speed of sound increases with an increase in temperature.
Fill in the blank: Sound waves can be reflected, refracted, and _____.
diffracted
