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