A method of identifying the user’s own voice in a hearing instrument system and a hearing instrument system for performing such method is provided wherein a direct-to-reverberant ratio between the signal energy of a direct sound part and that of a reverberant sound part of at least a part of a recorded sound is used to assess wether the sound originates from the users own voice or not. An entry is selected as a prefix value and prefix compression of the data set is performed. A graphics logic device is coupled to the graphics processing unit. A spring member of the spring-loaded anvil is preferably pre-loaded. By using this composition, such calcined patterns as a conductor pattern and a dielectric pattern of high fineness may be formed by the photolithographic technique.