Podcast
Questions and Answers
What is the primary factor that determines the pitch of a sound?
What is the primary factor that determines the pitch of a sound?
- The amplitude of the sound wave
- The frequency of the sound wave (correct)
- The intensity of the sound wave
- The loudness of the sound wave
What happens to the amplitude of a sound wave when its frequency increases?
What happens to the amplitude of a sound wave when its frequency increases?
- It increases proportionally
- It becomes zero
- It decreases inversely (correct)
- It remains constant
What is the characteristic of a sound that is perceived as loud or soft?
What is the characteristic of a sound that is perceived as loud or soft?
- Loudness (correct)
- Amplitude
- Pitch
- Frequency
Which of the following best describes the relationship between the frequency and time period of a sound wave?
Which of the following best describes the relationship between the frequency and time period of a sound wave?
What is the minimum distance required for an echo to be heard clearly?
What is the minimum distance required for an echo to be heard clearly?
What happens to sound waves when they meet a soft surface?
What happens to sound waves when they meet a soft surface?
What is the characteristic of a sound wave that determines its pitch?
What is the characteristic of a sound wave that determines its pitch?
What is the type of sound wave that is repeated because of reflection?
What is the type of sound wave that is repeated because of reflection?
What is the relationship between the amplitude and loudness of a sound wave?
What is the relationship between the amplitude and loudness of a sound wave?
What is the term for the intensity of a sound wave?
What is the term for the intensity of a sound wave?
Flashcards
Pitch of a sound
Pitch of a sound
The perceived highness or lowness of a sound.
Sound wave frequency and amplitude
Sound wave frequency and amplitude
As frequency increases, amplitude decreases inversely.
Sound loudness
Sound loudness
How loud or soft a sound is perceived.
Sound frequency and time period
Sound frequency and time period
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Echo minimum distance
Echo minimum distance
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Sound absorption by soft surfaces
Sound absorption by soft surfaces
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Sound wave pitch
Sound wave pitch
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Repeated reflected sound waves
Repeated reflected sound waves
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Amplitude and Loudness
Amplitude and Loudness
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Sound wave intensity
Sound wave intensity
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Study Notes
Waves
- A wave is a disturbance that travels through a medium, transporting energy from one place to another without transporting matter.
Types of Waves
- Mechanical waves: require a medium to travel, e.g. water waves, sound waves
- Electromagnetic waves: do not require a medium, e.g. light waves
Characteristics of Waves
- Wavelength (λ): distance between two consecutive points on a wave that are in phase
- Frequency (f): number of oscillations or cycles per second
- Time period (T): time taken to complete one oscillation or cycle
Relationship between Frequency, Wavelength, and Time Period
- Wavelength is inversely proportional to frequency (λ ∝ 1/f)
- Frequency is inversely proportional to time period (f = 1/T)
Characteristics of Sound
- Pitch: characteristic of sound that allows us to distinguish between shrill and grave sounds
- Loudness: determined by the intensity of sound waves
- Amplitude: increases as frequency decreases, and decreases as frequency increases
Sound Waves
- Longitudinal wave: particles oscillate back and forth along the direction of the wave
- Produced by vibrations, e.g. drumbeat, voice
- Pitch increases with increase in frequency of vibration
Echo
- Sound that is repeated because sound waves are reflected back
- Occurs when sound waves bounce off smooth, hard objects
- Echo is heard clearly when the reflecting surface is at least 17 meters away
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Description
Learn about the basic terms related to sound waves, including compression and rarefaction, and how they move through the air as a series of alternate high and low-pressure zones.
