Assertion: doppler effect | /r/DefinedAs | the change
Facets:
value: in frequency
type: OTHER
value: in frequency of sound wave
type: OTHER
value: with respect to the observer
type: OTHER
value: due to a reflector
type: CAUSE
Source sentences:
text: Doppler shift or Doppler effect is defined as the change in frequency of sound wave due to a reflector moving towards or away from an object, which in the case of ultrasound is the transducer.
text: Doppler shift is also known as the Doppler effect is defined as the change in the wavelength or frequency of the waves with respect to the observer who is in motion relative to wave source.