For more detailed information, see for example Fant , Flanagan , Witten , O'Saughnessy , or Kleijn et al Some sounds are produced with complete stoppage of airflow followed by a sudden release, producing an impulsive turbulent excitation often followed by a more protracted turbulent excitation Kleijn et al. From technical point of view, the vocal system may be considered as a single acoustic tube between the glottis and mouth. Even hatred at times may elicit a response. Japan was exposed once to the menace of Czarist imperialism from the north which threatened the Kuriles and Hokkaido.
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