Method for manufacturing a turbomachine fan having a reduced noise level at multiple rotational frequencies of said turbomachine

A method for manufacturing a turbomachine fan including a plurality of blades mounted on a disk extending around a longitudinal axis, said method comprising:

• measuring in a cold state, when said turbomachine fan is in a non-operational state, at least one structural parameter on each of the plurality of blades,
• for each of the plurality of blades, estimating at least one structural parameter relating to each said blade when said turbomachine is in an operational state from the at least one measured structural parameter for each said blade,
• determining an optimal sequence (ORD) of the plurality of blades around the disk from the at least one estimated structural parameter obtained for each of the plurality of blades,
• mounting the plurality of blades on the disk in the optimal sequence (ORD) thus determined,
• wherein when said turbomachine fan is in said operational state, a reduced noise level at multiple rotational frequencies (FMR) is obtained as compared to a noise level that would be produced by a turbomachine fan in which the plurality of blades are mounted in a sequence determined based on said at least one measured structural parameter on each of the plurality of blades.