How do we hear?

Mar 28, 2019

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How do we hear?. Doppler Effect. Doppler Effect. Due to moving sound source closer to source = greater frequency farther from source = lesser frequency as sound moves towards listener the sound can be a high pitched whine as sound moves away from listener the sound can be a drumming sound.

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storm front
ultrasound
doppler effect
doppler radar
sound source
weather forecasters

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How do we hear?

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How do we hear?

Doppler Effect
Doppler Effect • Due to moving sound source • closer to source = greater frequency • farther from source = lesser frequency • as sound moves towards listener the sound can be a high pitched whine • as sound moves away from listener the sound can be a drumming sound
Uses of the Doppler Effect • Doppler radar • police use it to determine speed of car • the frequency of the reflected (echo) sound wave gives you the speed • weather forecasters can use it to determine how fast a storm front is moving • determine the speed of stars relative to Earth
Breaking the sound barrier! Why can’t I hear anything?
BOOM!!!

ULTRASOUND!

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