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Analysis of Angklung Sound Intensity as a Acoustic Instrument Hartanti, Rizka Silviana; Astuti, Budi
Journal Of Natural Sciences And Mathematics Research Vol 2, No 1 (2016): Volume 2, Nomor 1, 2016
Publisher : Faculty of Science and Technology, State Islamic University Walisongo Central Java

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.54 KB) | DOI: 10.21580/jnsmr.2016.1.1.1646

Abstract

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.
Contextual Learning By Using Batik Semarangan for Improving Students’ Learning Achievement Hartanti, Rizka Silviana; Yulianto, Agus; Khumaedi, Khumaedi
Physics Communication Vol 4, No 2 (2020): August 2020
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/physcomm.v4i2.31627

Abstract

This Research is aimed for knowing, (1) the implementation of contextual learning by using Batik Semarangan for physics material especially temperature and heat, (2) the improvement of students’ learning achievements after the application of contextual learning by using Batik Semarangan, and (3) the students’ responses after being given contextual learning by using Batik Semarangan. This research mix methods, namely quantitative and qualitative. This research was conducted in two classed at SMK Walisongo Semarang for student class X TKJ Telkom 1 as experimental class and X TKJ Telkom 2 as control class. The identification of local potential of Batik Semarangan was carried out by using interview and observation technique which were then analyzed qualitatively and the result was substituted to physics material, namely temperature and heat.  Furthermore, learning achievements were assessed from sides of cognitive, affective and psychomotor.  The result showed that contextual learning by using Batik Semarangan was effective for improving cognitive learning achievements as proved by experimental class having value of 0.79 which was higher than the control class of 0.57. In addition, the result showed that contextual learning by using Batik Semarangan was effective in improving effective learning achievements as proved by the experimental class average of 86.55 which was higher than the control class of 76.73. The result also showed that contextual learning by using Batik Semarangan was effective in improving psychomotor learning achievements as proved by the experiment class average score 33.3 higher than control class 25.4. The implementation of contextual learning by using Batik Semarangan got a positive responses by students because it made them easier to understand concepts, to be more skilled, and increased students’ interest in the learning process. Based on the result, it can be concluded that contextual learning with the use of Batik Semarangan can be applied to study temperature and heat material in classroom. Contextual learning with the use of Batik Semarangan can improve students’ learning achievement. Contextual learning with the use of Batik Semarangan got a good response by students.