Aera Home Smart Diffuser: 3.0 vs 2.0 noise comparison

This is a comparison of the noise levels of the newer 3.0 Aera home scent diffuser vs the older 2.0 model (both are the ‘smart’ versions). I also compare against a 2.0 model that I’ve owned for about a month, which has become more noisy over time as the motor / pump has aged.