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Doppler Shift

Application ID: 1376


We have all noticed the Doppler effect when an ambulance passes by with its sirens blaring. The siren’s pitch suddenly drops the moment the ambulance starts moving away from you.

Another effect you can notice is how the siren’s sound is very loud when nearby, but as soon as the ambulance has passed the sound becomes much quieter.

This model simulates the acoustic Doppler effect by placing a stationary sound source in a constant fluid flow.

The frequency shift is visualized, and the acoustic intensity, as measured by an observer moving with the flow, is calculated.

Questo modello è stato realizzato con:

Acoustics Module

The combination of COMSOL® products required to model your application depends on the physics interfaces that define it. Particular physics interfaces may be common to several products (see the Specification Chart for more details). To determine the right combination of products for your project, you should evaluate all of your needs in light of each product\'s capabilities, consultation with the COMSOL Sales and Support teams, and the use of an evaluation license.