Mostly Motorways for 8,000 Average miles

These tyres were recommended by my dealer as an alternative to the Micheline, which were the original tyres, these tyres are so noisy the road noise is excessive. The tyres behave very well apart from the road noise, which for me is distracting, so I will go back to Micheline when these have worn down,I am disappointed as they were rated at 69db.
Tyre size reviewed: 225-60-18-