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  • the self. Stern coined the term intelligence quotient (IQ) and invented the tone variator as a new way to study human perception of sound. Stern studied…
    15 kB (1851 palabras) - 18:16 19 may 2024
  • German psychologist William Stern invented the tone variator in 1897 to study human sensitivity to changes in pitch, going beyond the traditional psychophysical…
    5 kB (612 palabras) - 22:37 9 ene 2024
  • variable-frequency tone when driven by a stream of air in the "tone variator" invented by William Stern, 1897. When air is forced into a cavity, the pressure inside…
    20 kB (2519 palabras) - 16:31 3 abr 2024