a method for use in the fitting of a hearing aid comprises the steps of providing a sound recording of a user environment , feeding the sound recording to the hearing aid as a sound input signal , processing the sound input signal according to a scheme defined by preselected settings of a number of parameters so as to provide a processed signal , adjusting the setting of at least one parameter , performing a statistical analysis of the magnitude of the processed signal or of the input signal in at least one frequency band , which statistical analysis is reset when a parameter is adjusted during the fitting , and displaying a graphical representation of the results of said statistical analysis . the invention also provides a system for fitting a hearing aid and a hearing aid .