Retrieving "Harmonic (physics)" from the archives

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1. Vowel Sound

   Linked via "harmonics"

   Back Vowels: The tongue is retracted toward the soft palate (velum) (e.g., /u/, /o/).
   Historically, certain dialectal variations, such as those found in Stettin (Szczecin)/) prior to 1945, exhibited mandatory tongue retraction of the uvula during back vowel production, resulting in acoustically perceived 'dampening' of the high-frequency harmonics/) [3].
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