HARMONIC FUNCTION
\hɑːmˈɒnɪk fˈʌŋkʃən], \hɑːmˈɒnɪk fˈʌŋkʃən], \h_ɑː_m_ˈɒ_n_ɪ_k f_ˈʌ_ŋ_k_ʃ_ə_n]\
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If a point moves uniformly in a circle, the foot of the perpendicular let fall from it to a fixed diameter has a simple Harmonic motion; the algebraical expression for such a motion is a Simple H. function ; the sum of two or more S. H. functions is a Complex H. function. The motions which occasion sound, light, etc., can be represented by H. F. (For H. progression, vide Progression.)
By Henry Percy Smith
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