Ultrasonic

Sound Waves and Hearing

Flashcard
•
Science
•
8th Grade
•
Hard
Helen Forbes
FREE Resource
Student preview

5 questions
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1.
FLASHCARD QUESTION
Front
Back
Sound waves with a frequency too high to be heard by the normal human ear (above 20,000 hertz).
2.
FLASHCARD QUESTION
Front
Infrasonic
Back
Sound waves with a frequency too low to be heard by the normal human ear (below 20 hertz).
3.
FLASHCARD QUESTION
Front
Decibel
Back
A unit used to measure the intensity of a sound or the power level of an electrical signal.
4.
FLASHCARD QUESTION
Front
Pinna
Back
The part of the ear that collects sound waves.
5.
FLASHCARD QUESTION
Front
Hertz
Back
A unit of time to measure frequency.
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