by displaying frequency domain information

Full Title

Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility (G10L19/00 takes precedence) > Transformation of speech into a non-audible representation, e.g. speech visualisation or speech processing for tactile aids (G10L15/26 takes precedence) > Transforming into visible information > by displaying frequency domain information