| Doppler shift |
The Doppler shift (or Doppler Effect) is an increase or decrease in wavelength as the object emitting the wave moves relative to the observer. For example, a train whistle seems to be higher in pitch when the train is approaching you (the waves are compressed, shortening the wavelength), and lower in pitch when it is traveling away from you (the waves are elongated, lengthening the wavelength). The same thing happens with light waves when the light source is coming or going relative to us. ...
출처: www.enchantedlearning.com/subjects/astronomy/gloss...
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| Doppler effect |
The change in the observed frequency of an acoustic or electromagnetic wave due to relative motion of the source and the receiver. (Basic Science/sound/dopplereffect.htm)
출처: www.ndt-ed.org/GeneralResources/Glossary/letter/d....
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| Doppler shift |
The change in observed frequency of wave energy due to the relative motion of the observer and wave source. For example, as a train approaches your location, you hear a higher pitch sound. After the train has passed your location, you will hear a lower pitch sound. The Doppler radar uses this change in frequency to determine the velocity and direction of the wind.
출처: www.srh.weather.gov/srh/jetstream/append/glossary_...
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| Doppler |
A device which employs ultrasound to listen to the fetal heart. Sometimes referred to as a Doptone.
출처: pregnancytoday.com/reference/library/glossary.htm
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| Doppler shift |
The magnitude of the perceived change in the frequency of a sound due to the Doppler effect.
출처: developer.apple.com/documentation/mac/Sprockets/Ga...
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