Dimana: n = 0,1,2, … n = 0 (nada dasar) n = 1 (nada atas 1) = . = = = = 0. 0 . 1. 1 ∶ ∶ ∶ … = 1 ∶ 3 ∶ 5 ∶ … 1 2 0 Σ = Σ = + 1 D. Tabung Resonansi 2 − 1 = . 4 ∶ ∶ = 1 ∶ 3 ∶ 5 0 1 2 Dimana n = 1,2,3, … dan L = Panjang kolom udara