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what is "Loudness"?

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James grandy
what is "Loudness"?
on Nov 5, 2019 at 3:34:52 pm

I think there are some pretty qualified audio guys around here, so I'm going to throw this out here...ive done some reading on this but im still confused

Loudness. From my understanding, when boosting loudness one is essentially turning up frequencies that are not as easily heard by the human ear. This is why there is perceived loudness. A 1k test tone will sound louder at -18db than a 100kh test tone at the same level. i might be way off on this...anyone?


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Chris Wright
Re: what is "Loudness"?
on Nov 6, 2019 at 4:37:47 am

if this isn't premiere specific, you'll find all the audio guys waiting in the forum called "Audio Professionals"
but to jump-start your query, lookup 'pink noise'. you are essentially correct.


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Pat Horridge
Re: what is "Loudness"?
on Nov 6, 2019 at 7:41:32 am

In modern Post terms Loudness is a newe(er) way to measure the perceived volume of content R128 in Europe ATSC A/85 in America.
They work in similar but slightly different way.
Basically normal Audio meters don't take account of how we hear sounds do give misleading results.
Loudness is frequency shaped to better mimic our hearing. And the R128 has a gate to ignore liw leave sounds.
I'm the, UK the result is a measurement over the whole programme that represents the integrated or average loudness over the programme. The right audio plugin like Nugen is the simplest solution. Here in the UK its measured in LUFS Loudness Units Full Scale.
It's one of the half day courses I deliver for http://www.vet.co.uk

Pat Horridge
Broadcast & Post Consultant, Trainer, Avid Certified Instructor
Free online Tutorials at VET digital media academy online http://vimeo.com/channels/752951
pat@vet.co.uk



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James grandy
Re: what is "Loudness"?
on Nov 6, 2019 at 2:31:46 pm

Thanks for the responses....what about this scenario?

I have a sequence with levels riding around -18db. If i turned those levels down to say -30db, then boosted them back to -18 using the the "loudness" slider in the mastering window, would they sound different? Would they sound either louder or softer and/or have a different EQ?

When i do try this, it does sound different (better) but it almost sound like there is some compression added.


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Pat Horridge
Re: what is "Loudness"?
on Nov 6, 2019 at 3:10:20 pm

I'm not sure because I don't use the loudness control. I manually adjust my mix while monitoring the resultant loudness.
But I would imagine a loudness control would boost the gain over certain frequencies and less so in other frequencies.

Pat Horridge
Broadcast & Post Consultant, Trainer, Avid Certified Instructor
Free online Tutorials at VET digital media academy online http://vimeo.com/channels/752951
pat@vet.co.uk



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James grandy
Re: what is "Loudness"?
on Nov 6, 2019 at 3:24:28 pm

There is no compression of frequencies in the loudness process, correct?

Another question for ya--i dont even bother peak normalizing my audio clips because it is basically just boosting amplitude of the entire clip....but... what about "Loudness Normalization"?


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Chris Wright
Re: what is "Loudness"?
on Nov 8, 2019 at 7:22:18 am

Loudness Normalization is an average frequency weighted volume over time using different region standards.
basic levels reduction will simply lower all freqs equally (think basic volume control)

so, by lowering levels and raising loudness, you are lowering average volume. then averaging volume by low freqs being weighted lower and higher freqs weighted more all over a specific time interval.

multiband compression would be used for manually compressing selected frequencies instantly.


https://helpx.adobe.com/media-encoder/using/automatic-loudness-correction.h...
https://helpx.adobe.com/premiere-pro/using/premiere-essential-sound-panel.h...


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James grandy
Re: what is "Loudness"?
on Nov 8, 2019 at 5:18:32 pm

thanks for the tips everyone. Appreciate it.


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