DIE SCHALLSPEKTROGRAPHISCHE ANALYSE DER SAUGLINGSSTIMME: EIGENE UNTERSUCHUNGEN UND HISTORISCHER RUCKBLOCK ZUR KLINISCHEN ANWENDUNG

First scientific based evaluations on newborn and infant vocalisations were published in the early 19th Century. The development of spectrographic analysis of voice signals such as sonography enabled detailed evaluations on fundamental frequency, melody, formants and speech development of the children. Results were frequently related to respiratory diseases, central nervous disturbances and hearing impairment. In this paper the state of the historic and current research and clinical applications are presented. Yet, spectrographic analysis of newborn and infant vocalisations has not been developed towards a clinical routine procedure.