Wave Properties
What is the relationship between amplitude and energy in sound waves?
The amount of energy a sound wave carries depends on its amplitude.
What is a decibel?
A unit of sound intensity.
What is pitch primarily related to?
Frequency of sound waves.
What is the Doppler effect?
The change in pitch or wave frequency due to a wave source moving relative to an observer.
What is loudness primarily dependent on?
Sound intensity.
What are the areas of highest density in a longitudinal wave called?
Compressions.
What is the quietest sound that most people can hear defined as?
0 dB.
What is the frequency range that humans can typically hear?
About 20 Hz to 20,000 Hz.
What happens to the pitch of a fire truck's engine as it approaches you?
How does the intensity of sound waves affect their travel distance?
High-intensity sound waves can be heard farther away than low-intensity sound waves.
How does distance affect the intensity of sound?
Sound energy decreases with distance because the energy spreads out and some is transformed to other forms.
What can sustained sounds above 90 dB cause?
Permanent hearing loss.
What happens to pitch as frequency increases?
Pitch increases as frequency increases.
How do police use the Doppler effect?
They use radar guns to measure the speed of cars based on the frequency shift of reflected waves.
What is the relationship between amplitude and loudness?
As amplitude increases, loudness also increases.
What happens to sound waves when you turn up the volume on a speaker?
The amplitude increases and the intensity of sound increases.
How is sound intensity measured?
In decibels, which quantify the level of sound intensit
How is frequency measured?
In hertz (Hz).
Describe what happens to sound waves as a race car approaches.
The compressions are closer together in front of the car, resulting in a higher pitch.
How do ears perceive differences in loudness?
Ears can tell the difference between low-intensity and high-intensity sounds.
What is the decibel scale used for?
It measures sound intensity, where every increase of 10 dB represents a tenfold increase in intensity.
What is the intensity level of an average home noise?
About 50 dB.
What is the relationship between frequency and pitch?
Higher frequency leads to a higher pitch, while lower frequency leads to a lower pitch.
What occurs to the pitch of a sound as you move away from the source?
The pitch becomes lower.
What happens to sound intensity when you turn down the volume?
Less energy is carried by the sound waves, resulting in lower intensity.