Do frequency test sweeps (REW etc) compensate for fletcher munson

[fatoldgit]

As title says, do test sweeps compensate for fletcher munson to achieve equal loudness or are they all flat (i.e. set to say -6db digital scale)?

 

[Blumlein 88]

They are all flat.

 

[Philbo King]

You could design a F-M curve (for some constant audio level; it's very level-dependent) with the EQ section and export it as an IR. I guarantee you won't like the results. Your auditory cortex has spent your whole life adapting to your built-in F-M. It would be like wearing glasses where you see everything upside down.

 

[Chrispy]

Not unless designed to do so....

 

[MaxwellsEq]

As title says, do test sweeps compensate for fletcher munson to achieve equal loudness or are they all flat (i.e. set to say -6db digital scale)?


View attachment 293604

This is quite a popular question, just reworded.

A recording system must not compensate for the Fletcher–Munson curves.

An accurate domestic playback system must not compensate for the Fletcher–Munson curves.

End consumer kit may have a loudness button which allegedly compensates for the Fletcher–Munson curves, but in practice must always be a fudge.

 

[fatoldgit]

ok

so the answer is no... each frequency in the sweep will be at a constant level because music production doesnt compensate and the playback side also doesnt so having a compensated frequency sweep that is used for room measurements wouldnt mimic the "end to end" musical content the room would experience.

Thanks for that

Peter