What creative ideas can you suggest for incorporating the Doppler effect into a costume?

One creative idea for incorporating the Doppler effect into a costume is to create a costume that represents a moving sound source, such as a race car or an ambulance. You can use materials like fabric or cardboard to create the shape of the vehicle, and add details like wheels or sirens to enhance the effect. To further emphasize the Doppler effect, you can attach strings or ribbons to the costume that trail behind as if they are being stretched or compressed by the moving sound waves. This visual representation can help demonstrate how the pitch of a sound changes as it moves towards or away from an observer.