Voice fundamental frequency in mentally retarded children

S. Biondi, M. Zappala, G. Amato, F. Consoli, R. Ferri

Research output: Contribution to journalArticlepeer-review


The electroacoustic vocal characteristics of 200 mentally retarded subjects were compared with those of 200 age- and sex-matched normal controls. The main results were: (1) mentally retarded subjects showed higher values of fundamental frequency which increased significantly as IQ decreased; (2) all groups showed an effect of age: the fundamental frequency decreased as age increased; (3) mentally retarded subjects showed a higher rate of various alterations such as biphonation, fundamental frequency shift and noise. These findings can be interpreted as the result of a neurophysiological immaturity in mentally retarded subjects.

Original languageEnglish
Pages (from-to)84-93
Number of pages10
JournalBrain Dysfunction
Issue number1-2
Publication statusPublished - 1990

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)


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