A method of generating a set of filters determining an initial estimate of a filter to be applied to a signal associated with each transducer; defining a model of the system; calculating the vibration of the member as an output of the model of the system; calculating the output of the model by comparing the output of the model with a measured value; determining changed parameter values of parameters of the model; recalculating the error value for the output of the model by comparing the output of the model with the changed parameter values with the measured value; comparing the recalculated error value with the reference error value; setting the recalculated error value as the reference error value, setting the changed parameter values as the model parameters, and repeating the above steps, or outputting the model parameters; generating a set of new filters each using respective output model parameters.