Pengaruh Polyurethan pada Kemampuan Meredam Suara Home Made Foam: Riki Perdana, Tri Utami, Erlin Eveline, Devi Afriani, dan Suparno

Riki Perdana Riki Perdana (Program Pascasarjana, Pendidikan Fisika Universitas Negeri Yogyakarta, D.I Yogyakarta 55281)
Tri Utami Tri Utami (Program Pascasarjana, Pendidikan Fisika Universitas Negeri Yogyakarta, D.I Yogyakarta 55281)
Erlin Eveline Erlin Eveline (Program Pascasarjana, Pendidikan Fisika Universitas Negeri Yogyakarta, D.I Yogyakarta 55281)
Devi Afriani Devi Afriani (Program Pascasarjana, Pendidikan Fisika Universitas Negeri Yogyakarta, D.I Yogyakarta 55281)
Suparno Suparno (Program Pascasarjana, Pendidikan Fisika Universitas Negeri Yogyakarta, D.I Yogyakarta 55281)

JFA (Jurnal Fisika dan Aplikasinya)
Vol 15 No 2 (2019): June 2019 Edition

Effective foam composition has been produced as sound absorbing material based on sound absorption coefficient value. The method used is experimentation, by mixing the main ingredients (polyurethane) with the developer liquid (isocyanate). There are five variations of research, with the isocyanate as a control variable. The results obtained from the first to fifth variations in a row are 0.152; 0.072; 0.042; 0.028 and 0.056. From the findings it can be concluded that the less polyurethane is added the greater the absorption coefficient value so it is better to absorbs the sound.