Look for the HVI Certified or AMCA label on the box or spec sheet.
In commercial and residential construction, "verified" usually refers to or HVI (Home Ventilating Institute) certification. When a product is "Sone to dBA verified," it means: sone to dba verified
Unverified products often use "marketing dBA," which might be measured from further away or in "ideal" settings that don't reflect real-world use. Look for the HVI Certified or AMCA label