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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Audio Measurement and Testing => Topic started by: Merlijn van Veen on June 05, 2017, 12:32:06 PM

Title: Equal Loudness Contours Target Curve Files for Smaart
Post by: Merlijn van Veen on June 05, 2017, 12:32:06 PM

I've added ELC Target Curve files for Smaart to the Equal Loudness Contours archive at the website.

For correct results be sure to use 1/3 octave banding in Spectrum mode!

Please click here (https://www.merlijnvanveen.nl/en/calculators/59-equal-loudness) for the files.

Title: Re: Equal Loudness Contours Target Curve Files for Smaart
Post by: Mark Oakley on June 08, 2017, 01:23:10 PM

Thanks for posting these Merlijn. Sorry to be a total dunce, but how should these be used? Surely not as a Target Curve? Possibly an inverse Target Curve?

-Mark

Title: Re: Equal Loudness Contours Target Curve Files for Smaart
Post by: Merlijn van Veen on June 08, 2017, 01:35:42 PM

Quote from: Mark Oakley on June 08, 2017, 01:23:10 PM

Thanks for posting these Merlijn. Sorry to be a total dunce, but how should these be used? Surely not as a Target Curve? Possibly an inverse Target Curve?

-Mark

Evidently not, but they might come in handy. Rational Acoustics already made the Noise Curves available and I figured this would be a nice complement.

I typically use the curves in class to explain how we e.g. perceive a "flat" or equal amplitude system.

Title: Re: Equal Loudness Contours Target Curve Files for Smaart
Post by: John Roberts {JR} on June 08, 2017, 01:46:32 PM

Quote from: Mark Oakley on June 08, 2017, 01:23:10 PM

Thanks for posting these Merlijn. Sorry to be a total dunce, but how should these be used? Surely not as a Target Curve? Possibly an inverse Target Curve?

-Mark

Yes, it would be applied inverse, but note it is also level dependant, so louder signals are perceived flatter and will need less EQ.

Very old Hifi systems had a loudness contour switch that would add boom/sizzle but only at low volume levels.

For serious sound reinforcement too much bass boost will eat amplifier headroom. For fixed install constant voltage systems the cheap magnetics can be easily saturated by too much LF boost at higher levels, so be prudent about using extreme amounts of boost. 

JR