Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
sonar
|
a type of listening device that uses sound waves to locate objects; sound navigation and ranging
|
|
echolocation
|
sonar used by bats
|
|
Doppler effect
|
the effect of motion on sound; named in honor of the Austrian physicist Christian Doppler
|
|
beat
|
the destructive interference of two sound waves with slightly different frequencies and similar amplitudes
|
|
decibels (db)
|
the smallest difference in intensity between two sounds that the human ear is capable of detecting
|
|
waves
|
rhythmic disturbances that transfer energy through space or matter
|
|
sound
|
mechanical waves taht can often be detected by our ears
|
|
pitch
|
the distance between two adjacent threads on a screw; how high or low a tone sounds to an observer (related to frequency)
|
|
loudness
|
related to intensity; how strong or weak a sound is to an observer
|
|
ultrasonic
|
sound waves that are too high in frequency for the human ear to hear
|
|
threshold of hearing
|
the very softest sound level that can be detected by an observer
|
|
infrasonic
|
sound waves that are too low in frequency for the human ear to hear
|
|
resonance
|
the transfer of energy from one object to another object with the same natural frequency
|
|
frequency
|
the number of waves that pass a given point in one second
|
|
acoustics
|
the effect of materials and their shapes on sound
|
|
rarefaction
|
a region where the air molecules are spread apart by the energy of a sound wave
|
|
amplitude
|
the distance that a wave rises or falls from its normal rest position
|
|
compression
|
a region where air molecules are pushed closer together than normal by the energy of a sound wave
|