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Thank you for this, Glenn. I would have never learned it otherwise. And stopped watching TV North of 15 years ago, so my third screen just serves videos/movies I rent/stream.

Well executed, too with "back to the REAL issue..." at the end there.

To correct a persistent misperception, the volume of TV ads is not louder than the show. It is perceived as louder because advertisers long ago learned to use a full audio spectrum to draw your attention, which TV shows typically don't do (or, do as much).
The actual output level (RMS) is identical whether for ads or TV show, but the anatomy of our ears fools our brains into thinking the volume has increased during commercials. Our perception of loudness is not linear across frequencies, so what you react to is being presented with a full spectrum of sound waves, not a louder signal.
Splitting a gnats hair, but accurate. Perception, is reality? Back to the REAL issue.....

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