Potensi Sekam Padi dan Jerami sebagai Alternatif Material Akustik

Rohim, Ahmad Minanur; Fianti, Fianti; Nurbaiti, Upik

doi:10.21580/perj.2020.2.1.4883

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…The sound absorption coefficient is influenced by the frequency of the sound source. The frequency is divided into three namely, the low-frequency value is less than 1000 Hz, the medium frequency value is between 1000 Hz to 4000 Hz, and the high-frequency value is more than 4000 Hz (Rohim et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

“…Each composite has an optimum sound absorption capability at a certain frequency. The acoustic properties of the material as a sound absorber are very good at a frequency of 1000 Hz (Rohim et al, 2020). This is because at this frequency there is a waste of energy which increases the value of the sound absorption coefficient.…”

Section: Resultsmentioning

confidence: 99%

“…The rapid development of technology makes the human need for the equipment used is increasing. The use of equipment used by humans for means of communication, transportation, information, production, and entertainment cannot be separated from the noise produced (Rohim et al, 2020). Equipment that uses increasingly sophisticated technology produces unexpected sounds that cause noise and discomfort to human hearing (Astika & Dwijana, 2016).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Natural Composite of Sawdust Teak as a Sound Absorption Materials Using The Resonator Space Method

Nurbaiti

Yulianto²,

Nurbaiti³

2022

PERJ

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The development of science and technology has resulted in the increasing use of sophisticated equipment that can produce unwanted sounds, resulting in noise. Acoustic materials are a solution that can reduce noise. This study aims to determine the sound absorption coefficient of a composite of teak sawdust and polyester resin as an environmentally friendly acoustic material. The sample was made in the form of a cylinder using a press of as many as six samples with a comparison of the mass fraction of teak sawdust and the mass fraction of polyester resin, namely sample 1 (30:70), sample 2 (40:60), sample 3 (50:50), sample 4 (60:40), sample 5(70:30), sample 6(80:20). The samples that have been made were tested using a resonance space and sound level meter to measure the value of the sound absorption coefficient (α) at frequencies of 500 Hz, 1000 Hz, 1500 Hz, 2000 Hz, 2500 Hz, and 3000 Hz. The optimal acoustic material sample in sample 1 with a fiber mass fraction of 30% and a sound absorption coefficient of 0.707 at a frequency of 3000 Hz.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Natural Composite of Sawdust Teak as a Sound Absorption Materials Using The Resonator Space Method

Nurbaiti

Yulianto²,

Nurbaiti³

2022

PERJ

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“…Di beberapa daerah di Jawa Tengah, Yogyakarta dan Jawa Timur, para petani memanfaatkan dan menyimpan jerami untuk pakan ternak, baik sapi maupun kerbau. Sebagian juga diolah untuk pupuk fermentasi, tetapi hal ini jarang sekali dilakukan di masa-masa sekarang [2] Sementara itu di negara maju, jerami telah dapat dimanfaatkan secara langsung sebagai bahan bangunan yang justru memberikan nilai tambah sesuai kondisi cuaca setempat, yaitu mampu menjadi insulator pada saat berlangsungnya musim dingin [3]. Menurut…”

Section: Pendahuluanunclassified

Kajian Pemanfaatan Limbah Jerami yang Berpotensi sebagai Wet Covering Beton

Irnawan

Hendarti

Primantari

2022

JIRS

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Jerami merupakan bahan yang melimpah dan keberadaannya sangat mudah didapatkan bahkan hanya dibakar begitu saja. Di beberapa daerah di Jawa Tengah, Yogyakarta dan Jawa Timur, para petani memanfaatkan dan menyimpan jerami untuk pakan ternak, baik sapi maupun kerbau. Sebagian juga diolah untuk pupuk fermentasi, tetapi hal ini jarang sekali dilakukan di masa-masa sekarang. Manfaat penelitian ini dapat memberikan data sehingga akan mengetahui sifat insulator yang mampu mengawetkan kadar air dalam jerami sehingga diharapkan dapat memberikan bahan alternatif pengganti bahan sintetis dengan material alam dari limbah jerami Selain itu dapat mengurangi limbah jerami padi yang sudah tidak digunakan lagi hingga tidak mencemari lingkungan dan dapat menjadi bahan pertimbangan bagi dunia industri untuk menggunakan limbah jerami sebagai selimut curing beton dan tidak dianggap lagi sebagai limbah yang merugikan oleh masyarakat. Penelitian ini menggunakan metode eksperimen destruktif, artinya metode untuk mendapatkan data uji, spesimen akan mengalami kerusakan. bahwa kemampuan jerami berdasar fraksi volume 10% hingga 90% mampu menyerap air cukup signifikan rata-rata 47,59%. Penyerapan air pada komposit jerami akan mampu meminimalkan kemungkinan negatif pada cor beton saat mendapat panas secara langsung dari sinar matahari. Pada kajian potensi komposit jerami terhadap kemampuan densitas, menunjukkan bahwa kemampuan jerami berdasar fraksi volume 10% hingga 90% mampu densitas cukup signifikan rata-rata 204,96 kg/cm3 . Hasil kajian potensi komposit jerami terhadap siklus thermal, diketahui bahwa kemampuan jerami berdasar pada siklus thermal 10 oC hingga 90 oC oC mempunyai nilai cukup signifikan rata-rata 20,16 MPa. Angka tersebut menunjukkan bahwa komposit jerami-epoksi berpotensi sebagai wet covering cor beton.

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“…Rice straw fiber can also be used as a sound absorber [18]. Rice husk hasa sound absorption capacity of 0.034 dB, and straw has a sound absorption capacity of 0.030 dB [19]. Data obtained from acoustic studies showed that the highest value of sound absorption coefficient of 6400 Hz was noticed for composite specimens developed using rice husk and saw dust reinforced with hybridized polymer composites [20].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Sample Density of Mixed Husk and Bran on Reflection and Transmission Coefficient of Acoustic Waves

Abdjul

Kurniasari

Katili

et al. 2022

J. Penelit. Fis. Apl.

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Noise is a sound that is not desired because it is not in accordance with the context of activity, space, and time so it can cause disturbances to comfort and even human health. Twoof the basic ingredients of a silencer are husk and bran. This research aimed to determine the effect and model of the relationship of the density of the sample mixture of husks and bran on acoustic waves' reflection coefficient and transmission coefficient. The method used in this research is experimental, using a mixture of husk and bran samples whose density consists of 5 variations. The results showed that the husk and bran mixture's sample density strongly affected the reflection coefficient (r = 0.947 to r = 0.966) and the transmission coefficient (r = -0.962 to r = -0.999). These resultsshow that the greater the sample density of the husk and bran mixture, the greater the absorption intensity fraction produced. Statistically, the level of influence is indicated by the correlation coefficient, whose value is around r = 0.95 to r = 0.99. Based on the results, the reflection and transmission coefficients are influenced by the density of the mixture of husk and bran samples.

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Potensi Sekam Padi dan Jerami sebagai Alternatif Material Akustik

Cited by 4 publications

References 6 publications

The Natural Composite of Sawdust Teak as a Sound Absorption Materials Using The Resonator Space Method

The Natural Composite of Sawdust Teak as a Sound Absorption Materials Using The Resonator Space Method

Kajian Pemanfaatan Limbah Jerami yang Berpotensi sebagai Wet Covering Beton

The Effect of Sample Density of Mixed Husk and Bran on Reflection and Transmission Coefficient of Acoustic Waves

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