Gelombang Bunyi

 

Dawai atau Senar

Cepat rambat gelombang bunyi pada dawai

 

\(v =  \sqrt{\dfrac {F}{\mu}}\) dimana \(\mu = \dfrac mL\)

\(v =  \sqrt{\dfrac {F}{\rho \:.\: A}}\)

 

Frekuensi nada dasar (\(f_o\))

\(f_o =  \dfrac {v}{2L}\)

Perbandingan frekuensi nada harmonik

\(f_o : f_1 : f_2 : f_3 = 1 : 2 : 3 : 4\)

Gelombang Stationer Pada Dawai

 

Nada dasar

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\(L = \frac 12 \lambda\)

\(\lambda = 2 L\)

Nada atas ke satu

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\(L = \lambda\)

Nada atas ke dua

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\(L = \frac 32 \lambda\)

\(\lambda = \frac 23 L\)

 

Pipa Organa

Pipa organa terbuka

\(f_o = \dfrac {v}{2L}\)

\(f_o : f_1 : f_2 = 1 : 2 : 3\)

Pipa organa tertutup

\(f_o = \dfrac {v}{4L}\)

\(f_o : f_1 : f_2 = 1 : 3 : 5\)

Gelombang stationer pada pipa organa terbuka

 

Nada dasar

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\(L = \frac 12 \lambda\)

\(\lambda = 2 L\)

Nada atas ke satu

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\(L = \lambda\)

Nada atas ke dua

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\(L = \frac 32 \lambda\)

\(\lambda = \frac 23 L\)

Gelombang stationer pada pipa organa tertutup

 

Nada dasar

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\(L = \frac 14 \lambda\)

\(\lambda = 4 L\)

Nada atas ke satu

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\(L = \frac 34 \lambda\)

\(\lambda = \frac 43 L\)

Nada atas ke dua

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\(L = \frac 54 \lambda\)

\(\lambda = \frac 45 L\)

 

SOAL LATIHAN

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