水葫芦声材料作为蒸汽集成项目学习模式(PjBL)的研究

IF 3.3 Q1 DEMOGRAPHY
M. Rohman, P. Marwoto, S. Priatmoko
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引用次数: 2

摘要

本研究旨在从自然界中寻找一种廉价且环保的替代吸声材料,即水葫芦植物(Eichhornia crassipes)。该实验隔音工具是将科学、技术、工程、艺术和数学(STEAM)元素整合在一起,作为学生基于项目的学习模式(PjBL)的替代方案。使用的研究方法是实验性的。水葫芦被晒干,编织成餐垫的形式,在250赫兹、500赫兹、750赫兹、1000赫兹和1500赫兹的几个频率下,使用两种不同的测试样品。采用了PjBL的六个阶段,并集成了STEAM的元素。研究结果得到了测试样本1、测试样本2或测试样本1和测试样本2的组合的声音降噪(Noise Reduction, NR)值。每个测试样品在1500 Hz高频有效;即测试NR 1 = 8.7 dB,测试NR 2 = 8.3 dB,测试NR Gab=9.3 dB。组合测试样品在500 Hz和750 Hz频率下也有效,NR Gab=4.3 dB和NR Gab=4.7 dB。根据理论,3到12分贝的声音变化会对人类产生影响。本研究认为,天然水葫芦纤维作为一种可替代的吸声材料具有较好的性能。这个实验工具也可以替代steam集成的PjBL学习模型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Study of Sound Materials of Water Hyacinth (Eichhornia Crassipes) as Alternative STEAM Integrated Project-Based Learning Model (PjBL)
This study aims to find an alternative sound-absorbing material from nature that is cheap and environmentally friendly, namely the water hyacinth plant (Eichhornia crassipes). The experimental soundproofing tool from a glass box with a placemat skat was developed by integrating science, technology, engineering, arts, and mathematics (STEAM) elements as an alternative project-based learning model (PjBL) for students. The research method used is experimental. Water hyacinth was sun-dried, woven in the form of a placemat with two variations of the test samples at several frequencies of 250 Hz, 500 Hz, 750 Hz, 1000 Hz, and 1500 Hz. Six stages of PjBL are used, and elements of STEAM are integrated. The results of the study obtained the value of Noise Reduction (NR) of sound for test samples 1, test sample 2, or a combination of test samples 1 and 2. Each test sample is effective at 1500 Hz high frequency; namely, test NR 1 = 8.7 dB, test NR 2 = 8.3 dB, and NR Gab=9.3 dB. The combined test sample was also effective at frequencies of 500 Hz and 750 Hz, with NR Gab=4.3 dB and NR Gab=4.7 dB. Following the theory that changes in sound between 3 to 12 dB have effects that humans can feel. This study concludes that natural water hyacinth fiber has fairly good quality as an alternative sound-dampening material. This experimental tool can also be an alternative to the STEAM-integrated PjBL learning model.
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