sound Flashcards
a description of how high or low a sound seems to someone
pitch
describes awareness of the energy of a sound
loudness
the amount of energy a sound wave carried per second through a unit area
intensity
unit used to compare loudness of sounds
decibel
the change in frequency of a wave as its source moved in relation to an observer
Doppler effect
the use of reflected sound waves to determine distances or to locate objects
echolocation
sound waves with frequencies above the normal human range of hearing
ultrasound
a system that uses reflected sound waves to detect and locate objects underwater
sonar
a device that uses reflective waves to produce a picture
sonogram
the complete range of electromagnetic waves places in order of increasing frequency
electromagnetic spectrum
electromagnetic waves with the longest wavelengths and lowest frequencies
radio waves
waves with shorter wavelengths and higher frequencies that those of radio waves
microwaves
a system that uses reflected microwaves to detect objects and measure their distance and speed
radar
electromagnetic waves with wavelengths shorter than those of microwaves
infrared Rays
an image that shows regions of different temperature in different colors
thermogram
