From the course: Audio for Video Editors: Essential Terms

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What is perceived loudness?

What is perceived loudness?

From the course: Audio for Video Editors: Essential Terms

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What is perceived loudness?

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- The government standardized the volume and perception of loudness with the CALM Act. And yet they still had to measure it. So they used LKFS and LUFS because it was more of a perception of volume over time, and it could help even out going from the programming to the commercials back to the programming. So we'll play this music here. And we'll go ahead and set the limiter for -10 dBFS. And we're going to use the compressor to start showing how you can increase and have different perceived loudness. All of a sudden, it's a lot louder. Jumped up over here on our meters as well. And it's louder but yet it's still at, technically, -10 dBFS, as our meters are showing us. Let's just toggle off the compressor for a minute. And it's a lot quieter, but it's hitting on its peak, -10 dBFS. So that way you can actually hear what perceived loudness is. Perceived loudness, even though dBFS is still at -10, perceived loudness is a lot hotter. All KFS is a direct result of the need to control those…

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