PROCESS FOR PRODUCING TYRES CAPABLE OF REDUCING CAVITY NOISE AND SET OF TYRES OBTAINED THEREBY

The process for producing tyres comprises arranging no more than four sets of noise-reducing elements (), each set being associated with a respective dimension Ldifferent from the dimension associated with the other sets; feeding in succession a set of tyres for vehicle wheels, having different values C of the inner circumferential extension; for each inner circumferential extension value, determining a respective number nof noise-reducing elements for each set of noise-reducing elements, with x ranging from 1 to N, as a function of the value of the inner circumferential extension, wherein for at least one value of the inner circumferential extension at least two respective numbers ndiffer from 0; for each tyre (), collecting from each set of noise-reducing elements () the respective number nof noise-reducing elements () and applying the collected noise-reducing elements () in a circumferential sequence along an inner surface () of the tyre (), with the dimension Loriented circumferentially.