Rolling noise Hankook Kinergy Eco K425 205/55R16 91T

Hello forum community, After I started in February to take care of new summer tyres for my Golf 6 1.4 TSI and after a long time to browse the internet, I decided between Hankook, Dunlop Sport Blue Response and Goodyear Efficient Grip Performance, finally also because of the price for the above mentioned Hankook. My route I drive every weekend: 50% country road, 50% BAB, 2 people, little luggage, 2.4 bar air pressure on VA and HA The tyres have In contrast to my winter tyres (Dunlop Winter Response 2 in 195/65R15) I have the feeling that the Hankook are very loud. No matter what road surface, no matter what speed, they are almost always unpleasantly loud. Do you have any solution or similar problems with the tyres? Is it perhaps also the wrong tyre pressure? I thank you already in advance for your help! Greetings, Felix