Abstract
Abstract – Sound absorption research using the press brick made of cement and sand has been done. The research was conducted to determine the effect of mixture on the absorption coefficient value of sound of the brick. In this research have made three variations ratio of cement : sand, that is 1:15, 1:10 and 1: 5 at pressure of 0.30 MPa. The physical quantity measured is the intensity of sound (dB) in the cube-shaped building model (74 x 74 x 68) cm3 by using a sound level meter. The intensity of sound is determined by nomogram method by varying the sound frequency of 1 - 10 kHz for 5 minutes. It is found that the absorption coefficient value increases with increasing frequency. At frequency range of 1 – 6 kHz, brick with ratio cement : sand of 1:15 has the highest absorption coefficient value, while at frequency range of 6 - 10 kHz, brick with ratio cement : sand of 1: 5 which has the highest absorption coefficient value.
Highlights
Sound absorption research using the press brick made of cement and sand has been done
The research was conducted to determine the effect of mixture on the absorption coefficient value
The physical quantity measured is the intensity of sound
Summary
Kebisingan merupakan intensitas bunyi (bunyi) dalam tingkat dan waktu tertentu yang tidak diinginkan. Kebisingan dapat mengakibatkan gangguan kesehatan serta kenyamanan lingkungan, termasuk ternak dan sistem alam [1]. Kebisingan dapat dihasilkan dari berbagai aktivitas seperti transportasi (bunyi mesin kendaraan bermotor), industri (bunyi mesin pabrik), pemasangan tiang pancang. Desain tata akustik pada hunian perlu mendapat perhatian supaya dapat memberikan kenyamanan yang maksimal bagi penghuni rumah tersebut. Oleh karena itu diperlukan material bangunan yang mampu menyerap gelombang bunyi secara maksimal. Salah satu material yang banyak digunakan sebagai struktur bangunan rumah adalah batako pres yang terbuat dari campuran pasir dan semen. Dalam penelitian ini telah diteliti kemampuan absorbsi dari beberapa variasi campuran batako. Untuk itu dilakukan pengukuran intensitas bunyi dari dalam sebuah model bangunan yang berbentuk kubus, kemudian menghitung nilai koefisien absorpsinya
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