發送短信 : Investigating the relationship between speaking fundamental frequency and acoustic vowel space size

  _  _     _____    _____     __   __   ______   
 | \| ||  |  ___|| |  __ \\   \ \\/ // |      \\ 
 |  ' ||  | ||__   | |  \ ||   \ ` //  |  --  // 
 | .  ||  | ||__   | |__/ ||    | ||   |  --  \\ 
 |_|\_||  |_____|| |_____//     |_||   |______// 
 `-` -`   `-----`   -----`      `-`'   `------`