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Get familiar with the reaction system: Introducing the Reaction System
ANSI-CTA-2034-A
This document is the basis for the recommended measurement process and design methods in VituixCAD.
I'm not deaf, I'm just not listening.
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I wonder how the -A version differs from ANSI/CTA-2034-B, Standard Method of Measurement for In-Home Loudspeakers. In one of Erin's speaker reviews he mentions the two standards and, IIRC, presented data for both standards.
B standard is still a work in progress as far as I can see.
https://standards.cta.tech/apps/group_public/project/details.php?project_id=540
https://standards.cta.tech/kwspub/current_projects/
There is a ANSI-CTA-2010-B document for testing subwoofers.
The spec I talk about in that review is in regards to subwoofer testing. There is a CEA-2010-A and then a CEA-2010-B (which is also CTA-2010-B, since CEA/CTA merged). It's confusing.
At any rate, both the standards have their own subwoofer measurement methods and results dictation. -A uses the same distortion thresholds for all frequencies in 1/3-octave steps from 20-63Hz. -B expands from 20-160Hz and changes the thresholds depending on frequency (more lax on lower frequencies; more stringent on higher frequencies).
Got it!
worth noting is that the 2010 spec @dcibel linked above is free. But the same spec but with the "CEA" moniker is $92. I didn't even know this until I went asking if anyone could verify something for me because I didn't want to pay $92 for the spec; the replies were "dude, it's free here". Of course, I wasn't aware of the fact that the CEA/CTA had merged and that the CTA spec is free.
It took me a bit to determine that these documents were in fact free, as the first link that came up in my search was this site, asking $100 for the document:
https://www.techstreet.com/standards/cta-2034-a?product_id=1892613
I later found the CTA store advertising the same document for $0:
https://shop.cta.tech/products/standard-method-of-measurement-for-in-home-loudspeakers