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Doppler Effect is the sudden rise in pitch of a sound as the sound approaches an observer and the immediate decrease in the pitch as soon as the sound source pas*es the observer. The Doppler Effect pitch is the change in pitch caused due to Doppler Effect. Doppler Effect was proposed by the physicist Christian Doppler. Doppler Effect refers to the effect on an observer when there is a change in the frequency of a wave when the wave approaches the Let us go through an example when, a vehicle sounding a horn approaches an observer, the receiving frequency for the observer is higher than the emitting frequency of the vehicle. Therefore, the sound seems to have a greater pitch. Doppler Effect can be felt in a moving position, either when the object producing the sound is moving, or when the person listening to the sound is moving or if the medium through which the sound waves travel is moving. Consider an ambulance approaching a person, the person can hear a high pitch as the ambulance gets closer and when the ambulance pas*es, the Here when the ambulance moves nearer during vibration of the sound wave, the wavelength of the wave is shortened. As the velocity of the wave remains the same, this lower wavelength gives a higher Doppler Effect pitch. The Doppler Effect has several application areas like sirens for emergency vehicles, which allow path clearance for the ambulance to pas*, in astronomy, in temperature measurement, in radar, in medical imaging and blood flow management, in flow measurement and velocity profile measurement, in underwater acoustics, in audio and vibration measurement. There are other Doppler Effect concepts like relativistic Doppler Effect, Doppler graph, inverse Doppler Effect, photo acoustic Doppler Doppler Effect pitch is the variation in the pitch caused due to an approaching sound source. As the source approaches the pitch increases and the pitch immediately drops as the sound source pas*es the observer. This is Doppler Effect pitch, which has application in