A couple thoughts. Back in August, I said (in that same post): "Of course, on a busy Eurobike show floor, it’s difficult to compare actual measurements."
The video I took was in a perfectly quiet setting, compared to again, a show floor. As I noted then, it sounded pretty quiet (especially compared to other trainers around).
The units have indeed shifted over time. There's a number of parts that have changed since then (many of which are reasons for the delay). However, I can't say whether or not that impacted noise levels. I know for example some changes were made around the casing in the back to make it more resilient to someone picking it up wonky. Again, no idea if that would impact noise substantially.
Note that the difference between 81db and 90db isn't linear, so it's actually a substantial jump in sound.
Now, like any trainer, sound is just a function of speed, so depending on which mode your in, you can control that. For example, in Erg mode, you could just go to the gearing that produces the lowest speed, and your wattage will still remain whatever you'd like it to be. You can see how slowly he was spinning in that video (virtually not at all), which means the noise is substantially lower. You can also however hear the same high-pitched sound if you listen closely- through the busy show floor.
Just my two cents.
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