Question

what are the conditions when the Doppler effect is not observed???

Answer 1

The conditions that cause the Doppler effect to not show are If the sound waves that are produced move toward the listener with a velocity greater than the velocity of sound.

Detailed answer

This condition is observed even when the distance between the source and the observer is constant.

• Whenever the source and the listener are moving in a circular motion it is said not to show the Doppler effect.
• And even if the velocity between the source and the observer has the same velocity.
• And also when the medium is the only thing that is moving