I'm not certain what do you mean by the sound of tyre hitting uneven surface, suspension issue?
5 years old tyre probably the rubber already hard therefore the road noise is very obvious, can try change continental cc tyres, their much more comfortable.
most effective solution i've tried for soundproofing is wheel arch/fender liner area.
door/floor soundproofing does almost nothing, paid so much but no effect on these area.
How to make the car quieter?, Change tyre or add sound proofing?