Analysis of Angklung Sound Intensity as a Acoustic Instrument

Rizka Silviana Hartanti*  -  Physics Education Postgraduate Program Universitas Negeri Semarang, Unnes Campus Bendan Ngisor Sampangan Semarang, Central Java, Indonesia
Budi Astuti  -  Department of Physics, Universitas Negeri Semarang, Semarang State University, Campus Sekaran Gunungpati, Semarang, Central Java, Indonesia

(*) Corresponding Author
DOI: 10.21580/jnsmr.2016.1.1.1646

The purpose of this study was to analysis of angklung sound intensity. The research method is using angklung musician 2 octaves. Each consists of two tube tone that sounded from the tone of G to G ', length and diameter of the tube every tone becomes independent variable, while intensity of the sound produced becomes dependent variable. Sound intensity is measured using a Sound Level Meter is placed with a constant distance. The result showed that G tone was a low tone which had a frequency of 49.5 Hz, first tube had 21.6 cm length and 4.1 cm diameter, second tube had 10.1 cm length and 3.4 cm diameter produced the sound intensity of 90.7 dB. G’ tone was a high tone which had a frequency of 99 Hz, first tube had 10 cm length and 3 cm diameter, second tube had 5.5 cm length and 2.1 cm diameter produced the sound intensity of 99.1 dB. It can be concluded that the higher the frequency, the greater the intensity of the sound produced. The shorter tube length and the smaller tube diameter, the greater the intensity of the sound. ©2016 JNSMR UIN Walisongo. All rights reserved.

Keywords: Angklung; Intensity of sound; Tube diameter; Tube length

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