The Nature of Sound & Hearing
What causes sound?
What is intensity?
Intensity is the amount of energy that flows through a certain
area in a specific amount of time. Ex:
When you turn down the volume of your radio, you reduce the energy carried by the sound waves. So, you are also reducing their intensity.
What is music
sounds that are carefully chosen and have regular patterns
What is echolocation
Echolocation is the process of locating objects by making sounds and interpreting the sound waves that reflect or bounce back.
What are electromagnetic waves?
Electromagnetic waves are made by vibrating
electric charges and can travel through space where there is
no matter.
What type of waves are sound waves?
Longitudinal
How are intensity and distance related?
Some of a wave’s energy is converted into other forms of
energy when it is passed from particle to particle. So intensity
affects how far a wave will travel.
What is overtone?
a vibtration whose frequency is a multiple of the fundamental frequency
What is sonar?
A system that uses reflections of underwater sound waves to detect objects
How do moving charges create magnetic fields?
any moving electric charge is surrounded by an electric field and a magnetic field.
What medium does sound move the slowest through?
Gas
What is loudness?
Loudness is how humans process intensity (the more intense, the more loud it sounds)
What is a resonator?
A hollow space filled with air that makes sound louder when the air inside of it vibrates
What types of waves does an ultrasound use?
Ultrasonic waves
When are electromagnetic waves made?
Electromagnetic waves are made when an electric charge vibrates.
How does temperature affect sound?
As temperature increases, molecules move faster, making sound carry faster.
What unit do we use to measure loudness?
We use decibels (dB) to measure loudness
What is sound quality?
the difference among sounds of the same pitch and loudness
How does ultrasound imaging work?
A technician aims the ultrasound waves toward the target area. The sound waves reflect off the organs or tissues.
Can a wave be a particle?
Yes!
Electromagnetic waves can behave as a particle, called a photon, whose energy depends on the frequency of waves
Explain how sound moves through the ear
Sound travels from the outer ear, to the middle ear and then to the inner ear, which converts sound into nerve impulses
How are frequency and pitch related?
Frequency, the number of wavelengths that pass a fixed point in one second, has an fixed relationship with pitch; as frequency decreases, pitch decreases.
NOT ON TEST: what is a wind instrument and why do we call it a wind instrument?
Answers will vary; we use a large resonator for air to pass through
How can we use ultrasound waves to target probems?
In kidney stones, ultrasonic waves create vibrations to break up the stones
Can a particle be a wave?
Yes! They form an interference pattern, which is formed by waves when they pass through an area and interfere with one another.