Absorbsi gelombang bunyi di udara

Haryanti, Nur (1996) Absorbsi gelombang bunyi di udara. Undergraduate thesis, FMIPA Undip.

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Abstract

Telah dilakukan penelitian penentuan koefisien absorbsi gelombang bunyi di udara. Besar koefisien absorbsi gelombang bunyi di udara dapat ditentukan dengan cara mengukur amplitudo maksimum dengan variasi jarak antara speaker dengan mic kondensor dan frekuensi bunyi. Pada percobaan ini udara sebagai mediumnya. Dan hasil percobaan diperoleh bahwa nilai koefisien absorbsi gelombang bunyi di udara : Dari perhitungan untuk frekuensi bunyi : 1909,4293 Hz = 0,1921 + 0,0003 in-I, 2434,9654 Hz = 0,2169 + 0,0003 rn-', 2920,0246 Hz = 0,2375 + 0,0004 m-1, 3404,1116 Hz = 0,2564 + 0,0004 m-1, 3476,6896 Hz = 0,2592 + 0,0004 tril, 3974,1873 Hz = 0,2771 ± 0,0005 m', 4372,2059 Hz = 0,2906 + 0,0004 nfl. Dari perhitungan grafik untuk frekuensi bunyi: 1909,4293 Hz = 0,27 + 0,01 m-1, 2434,9654 Hz = 0,30 + 0,01 nil, 2920,0246 Hz = 0,322 + 0,009 nil, 3404,1116 Hz = 0,34 + 0,61 rril, 3476,6896 Hz = 0,37 + 0,04 m-1, 3974,1873 Hz = 0,39 + 0,03 rn-1, 4372,2059 Hz = 0,45 + 0,05 nil, Dari hasil-hasil di atas terlihat adanya hubungan antara frekuensi dengan koefisien absorbsi gelombang bunyi udara. Semakin besar frekuensinya maka koefisien absorbsi gelombang bunyi di udara jugs semakin besar. Research for determining the coeficient of sound wave absorbtion in air has been done. The value of sound wave absorbtion coeficient can be determined by measuring maximum amplitudo with various different distances between speaker and condensor mic and sound frequency. Air is used as the medium in this research. From the research, the value of sound wave absorbtion coeficient in air is know : From the measurement of sound frequency : 1909,4293 Hz = 0,1921 + 0,0003 in-1, 2434,9654 Hz = 0,2169 + 0,0003 ni1, 2920,0246 Hz = 0,2375 ±0,0004 ni1, 3404,1116 Hz = 0,2564 + 0,0004 ni1, 3476,6896 Hz = 0,2592 + 0,0004 nil, 3974,1873 Hz = 0,2771 ± 0,0005 ni1, 4372,2059 Hz = 0,2906 ± 0,0004 From the graphic of sound frequency 1909,4293 Hz = 0,27 + 0,01 rn-1, 2434,9654 Hz = 0,30 + 0,01 rn4, 2920,0246 Hz = 0,322 + 0,009 tril, 3404,1116 Hz = 0,34 + 0,61 3476,6896 Hz = 0,37 + 0,04 ml, 3974,1873 Hz = 0,39 + 0,03 m4, 4372,2059 Hz = 0,45 + 0,05 nil, Those values show the relation between the frequency and the sound wave absorbtion coeficient in air. Larger frequency cause larger sound wave absorbtion coeficient in air.

Item Type:Thesis (Undergraduate)
Subjects:Q Science > QC Physics
Divisions:Faculty of Science and Mathematics > Department of Physics
ID Code:30292
Deposited By:Mr UPT Perpus 1
Deposited On:26 Oct 2011 08:22
Last Modified:26 Oct 2011 08:22

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