Dwi Aries Himawanto, PANEL ACOUSTIC CHARACTERISTICS OF CITY WASTE AT LOW FREQUENCY AND HIGH FREQUENCY VARIATION DUE TO THE LEVEL OF INORGANIC MATERIALS PANEL ACOUSTIC CHARACTERISTICS OF CITY WASTE AT LOW FREQUENCY AND HIGH FREQUENCY VARIATION DUE TO THE LEVEL OF INORGANIC MATERIALS Dwi Aries Himawanto Te knik Mesin Universitas See!as Maret S"rakarta #!$ Ir$ S"ta%i n&$ '(A S"rakarta E)%ai! * +,i-a./0a.&&$1&% A2STRACT The main purpose of this study was to determine the basic characteristics of soundabsorption coefficient of acoustic materials are made with organic and inorganic waste. The variable in this study is the change in composition of organic and inorgani c material. Making pengahncuran sample begins with basic material and continuing with the manufacture of cylindrical samples with dimeter 10 cm for the later specimens tested by using the method of characteristic acoustic impedance tube and tested for compressive streng th using a Universal T estin g Machine. From the re search that has been done can be concluded that at low frequency the greaterthe content of inor gani c mater ialthe gre ater the coeff icient abso rbsin ya. !t high frequenci es100" organic material has the highest sound absorption coefficientwhere the greater frequency coefficient absorbsinya also increasing ly rising. 3e0 ,&r+s* n&ise4 as&rent %ateria!4 as&r5ti&n 1&e66i1ient4 %"ni1i5a! ,aste INTRODUCTION A!&n7 ,it. t.e +e ve! &5 %ent &6 te1 .n& !&70 4 envir&n%enta! 5r& !e% s are e7innin7 t& 6ee! t.e n&ise 5r&!e%4 5arti1"!ar!0 in "ran envir&n%ents$ N&ise is 1!&se!0 re!ate+ t& &ne8s .ea!t.4 ,.i1. 1an 1a"se a 5ers&n8s .ea!t.$ One e66&rt t.at 1an e +&ne t& re+"1e n&ise4 es5e1ia!!0 in t.e r&&% is t& insta!! a n&ise as&r in7 %ateria! 9a1 &"s ti1 5ane!s :$ 2"t t.e n&ise as&rin7 %at eria! 9a1 &"s ti1 5an e!s : are avai!a!e in t.e %arket t&+a0 %&st are sti!! re!ative!0 e;5ensive an+ !ess envir&n%enta!!0 6rien+!0 $ On t.e &t.er .an+4 t&+a0 8s envir &n%en ta! 5r&!e%s are a!s& 6e!t %&re +ist"rin7 is 7a r a7 e4 es 5e 1ia! !0 a!s& t. e "r a n envir&n%ent$ S& 6ar %&st &6 t.e ,&rk +&ne in .an+!in7 %"ni1i5a! ,aste in In+&nesia is .&, t& +is5&se &6 ,aste t& t.e 5!a1e &66ina! +is5&sa! 9!an+6i!!:$ 2"t ne, 5r&!e%s ,i!! arise a7ain ,.en t.e ai!it0 &6 TPA is n&t a!rea+0 in a!an1e a7ain ,it. t.e ,aste 7enerate+$ 2ase+ &n t.e +es1 ri 5t i&n a&ve4 it is interestin7 t& 1&n+"1t resear1. &n "ran ,aste "ti!i<ati&n 6&r a!ternative n&ise as&rin7 %ateria!$ It is e;5e1te+ t.at ,it. t.e "ti!i<ati&n &6 "ran ,aste t& a!ternative n&ise as&rin7 %ateria! t& 7ive a s&!"ti&n t& envir &n%e nta! 5r&! e%s 1&n1e rnin7 n&ise an+ !i tt er4 es5e1ia! !0 in "r an envir&n%ents$ LITERATURE REVIEW =>
