We have a 1.5HP 2-speed Pentair Optiflow (in use for 2 months). At high speed it normally sounds like yours (loud at a distance of 1.5 ft). Over the years during my career as a consulting engineer (retired now), I've heard many pumps run (up to 75HP). I've never been responsible for maintaining them though. To me your pump sounds okay except for the fact you haven't noticed it being this loud before.
Have you always had air in the pump Basket? Air in the system can cause some noise. When we run our pump (below water level) on high, air disappears from the pump basket quickly, and we bleed it off with the filter. Could something be restricting your pump suction? That could make your pump work hard (be noisy), too, and a suction restriction could be why you have air in your pump basket.