The Doppler effect is what makes a siren change tones as it whooshes by

Because of the physics of sound waves, it’s only in the moments a sound is right next to us that it maintains the tone we expect

What if this is true of not just sound, but everything? I’ve come to think there’s a Cultural Doppler Effect

What sounds right in the moment feels different and dated to a time and place later on

This is true of fashion, design, music, beliefs, literally everything