AudioScope
Where Did the Bass Go?
Hear the same bass line through a simulated small speaker, then listen to what happens when upper harmonics are added.
Why is the bass line easier to follow?
A 150 Hz high-pass filter is used here to model bass roll-off. The 55 Hz note stays weak in the third pass. Upper harmonics make more of the tune audible without restoring the missing low end. Real speakers vary, and these passes share a gain setting without being loudness-matched.