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[표제지 등]=0,1,2

요약문=i,3,4

Contents=v,7,2

Table Caption=vii,9,1

Figure Caption=viii,10,5

ABSTRACT=xiii,15,2

I. 서론=1,17,2

II. 조사 내용 및 방법=3,19,1

1. 조사기간=3,19,1

2. 조사내용=3,19,1

가. 흡음재의 흡음성능=3,19,3

나. 흡음재의 흡음성능 평가방법=5,21,3

다. 방음벽의 흡음계수 및 투과손실=7,23,1

3. 측정방법=7,23,1

가. 흡음계수 측정=7,23,6

나. 투과손실 측정=12,28,3

III. 연구결과 및 고찰=15,31,1

1. 흡음재의 흡음성능=15,31,1

가. 측정기기의 기록응답속도에 따른 흡음계수 변화=15,31,2

나. 흡음재별 흡음특성 비교=16,32,3

다. 두께 변화에 따른 흡음계수 비교=18,34,6

라. 밀도 변화에 따른 흡음계수 비교=23,39,5

마. 표면마감에 따른 흡음계수 비교=27,43,12

바. 배후공기층 크기변화에 따른 흡음계수 비교=38,54,17

사. 흡음계수 평가방법에 따른 흡음계수 비교=55,71,6

아. 타 기관과의 흡음계수 비교=60,76,4

자. 측정방법(관내법)에 따른 흡음계수 비교=64,80,4

2. 방음벽의 흡음계수 및 투과손실=68,84,1

3. 흡음재별 단가 비교=69,85,3

IV. 결론=72,88,3

참고문헌=75,91,3

부록=78,94,1

잔향실법 흡음계수 측정결과=79,95,45

관내법 흡음계수 측정결과=124,140,16

영문목차

[title page etc.]=0,1,2

Abstract=i,3,4

Contents=v,7,2

Table Caption=vii,9,1

Figure Caption=viii,10,5

ABSTRACT=xiii,15,2

I. Introduction=1,17,2

I. Contents and Method=3,19,1

1. Investigation Period=3,19,1

2. Investigation Suobject=3,19,1

a. Performance of Absorptive Materials=3,19,3

b. Performance Test Method of Absorptive Materials=5,21,3

c. Absorption Coefficient and Transmission Loss of Noise Barrier=7,23,1

3. Measurement Method=7,23,1

a. Absorption Coefficient Test=7,23,6

b. Transmission Loss Test=12,28,3

III. Results and Discussion=15,31,1

1. Absorptive Performance of Absorptive Materials=15,31,1

a. Absorption Coefficient according to Recording Response Speed of Instrument=15,31,2

b. Absorption Coefficient of Absorptive Materials=16,32,3

c. Absorption Coefficient according to the Thichless Change=18,34,6

d. Absorption Coefficient according to the Density Change=23,39,5

e. Absorption Coefficient according to the Surface Materials=27,43,12

f. Absorption Coefficient according to the Air Gap Thickness=38,54,17

g. Absorption Performance by NRC and Weighted Sound Absorption Coefficient=55,71,6

h. Absorption Coefficient of Other Institutes=60,76,4

i. Absorption Coefficient according to Test Method(Impedence Tube Method)=64,80,4

2. Absorption Coefficient and Transmission Loss of Noise Barrier=68,84,1

3. Unit Price Comparison of Absorptive Materials=69,85,3

IV. Conclusion=72,88,3

Reference=75,91,3

Appendix=78,94,62

표목차

(Table 2-1) Measurement outline of absorption coefficients=4,20,2

(Table 2-2) Measurement outline of absorption performance of noise barrier=7,23,1

(Table 3-1) Noise reduction coefficient(NRC) of absorptive materials=55,71,2

(Table 3-2) Weighted absorption coefficient(이미지참조) of absorptive materials=57,73,2

(Table 3-3) Comparison of measurement conditions of 3 laboratories=61,77,1

(Table 3-4) Comparison of unit price of absorptive materials=69,85,2

그림목차

(Fig. 2-1) Reference curve for weighted absorption coefficients=6,22,1

(Fig. 2-2) Schematic diagram of measuring instruments in a reverberation room=9,25,1

(Fig. 2-3) Selection of source position=9,25,1

(Fig1. 2-4) Selection of microphone position=10,26,1

(Fig. 2-5) Schematic diagram of measuring instruments for impedance tube method=12,28,1

(Fig. 2-6) Schematic diagram of measuring instruments in a reverberation room=13,29,1

(Fig. 3-1) Absorption coefficient according to recording response speed=15,31,1

(Fig. 3-2) Comparison of absorptive performance of absorptive materials(thickness 25 mm)=17,33,1

(Fig. 3-3) Comparison of absorptive performance of absorptive materials(thickness 50 mm)=18,34,1

(Fig. 3-4) Absorption coefficient according to thickness of materials(polyester)=19,35,1

(Fig. 3-5) Absorption coefficient according to thickness of material(polyurethane)=20,36,1

(Fig. 3-6) Absorption coefficient according to thickness of material(inconbustible melamine)=21,37,1

(Fig. 3-7) Absorption coefficient according to thickness of material(mineral wood)=22,38,1

(Fig. 3-8) Absorption coefficient according to thickness of material(fibrous natural wood)=23,39,1

(Fig. 3-9) Absorption coefficient according to density of material(polyester)=24,40,1

(Fig. 3-10) Absorption coefficient according to density of material(glass wool,C. Co.)=25,41,1

(Fig. 3-11) Absorption coefficient according to density of material(glass wool,N. CO.)=26,42,1

(Fig. 3-12) Absorption coefficient according to density of material(scrub stem)=27,43,1

(Fig. 3-13) Absorption coefficient according to facing of material (incombustible fabric+polyester 25mm)=28,44,1

(Fig. 3-14) Absorption coefficient according to facing of material(incombustible fabric+polyurethane 25 mm)=29,45,1

(Fig. 3-15) Absorption coefficient according to facing of matenal(peforated resin+polyurethane 25 mm)=30,46,1

(Fig. 3-16) Absorption coefficient according to lacing of material(perforated resinㆍpolyurethane 50 mm)=31,47,1

(Fig. 3-17) Absorption coefficient according to facing of material(incombustible fabric,perforated resin,mineral compound + incombustible melamine 25 mm)=32,48,1

(Fig. 3-18) Absorption coefficient according to facing of material(perforated resin + incombustible melanune 50 mm)=33,49,1

(Fig. 3-19) Absorption coefficient according to facing of material(perforated metallic panel + incombustible melamine 20 mm + incombustible fabric)=34,50,1

(Fig. 3-20) Absorption coefficient according to facing of material(mineral compound . glass wool 25,50 mm)=35,51,1

(Fig. 3-21) Absorption coefficient according to lacing of material(glass wool 50 min／64 K)=36,52,1

(Fig. 3-22) Absorption coefficient according to facing of material(glass cloth + glass wool + vapor barrier 90,120 mm)=37,53,1

(Fig. 3-23) Absorption coefficient according to thickness of air-gap(polyester 25 mm)=39,55,1

(Fig. 3-24) Absorption coefficient according to thickness of air-gap(polyester 50 mm)=40,56,1

(Fig. 3-25) Absorption coefficient according to thickness of air-gap(incombustible fabricㆍpolyester 25 mm)=41,57,1

(Fig. 3-26) Absorption coefficient according to thickness of air-gap(polyester 9 mm)=42,58,1

(Fig. 3-27) Absorption coefficient according to thickness of air-gap(polyurethane 25 mm)=42,58,1

(Fig. 3-28) Absorption coefficient according to thickness of air-gap(polyurethane 50 mm)=43,59,1

(Fig. 3-29) Absorption coefficient according to thickness of air-gap(incombustible fabric + polyurethane 25 mm)=43,59,1

(Fig. 3-30) Absorption coefficient according to thickness of air-gap(perforated resin + polyurethane 25 mm)=44,60,1

(Fig. 3-31) Absorption coefficient according to thicknesss of air-gap(perforated resin + polyurethane 50 mm)=45,61,1

(Fig. 3-32) Absorption coefficient according to thickness of air-gap(incombustible melamine 25,50 mm)=46,62,1

(Fig. 3-33) Absorption coefficient according to thickness of air-gap(incombustible fabric + incombustible melamine 25 mm)=46,62,1

(Fig. 3-34) Absorption coefficient according to thichkness of air-gap(perforated resin + incombustible melamine 25,50 mm)=47,63,1

(Fig. 3-35) Absorption coefficient according to thichkness of air-gap(mineral compound + incombustible melamine 25 mm)=48,64,1

(Fig. 3-36) Absorption coefficient according to thicknness of air-gap(perforated metallic panel + incombustible melamine 20 mm + incombustible fabric)=48,64,1

(Fig. 3-37) Absorption coefficient according to thickness of air-gap(glass wool 50 mm)=49,65,2

(Fig. 3-38) Absorption coefficient according to thickness of air-gap(mineral compound + glass wool 25 mm)=51,67,1

(Fig. 3-39) Absorption coefficient according to thickness of air-gap(mineral compound + glass wool 50 mm)=51,67,1

(Fig. 3-40) Absorption coefficient according to thicknness of air-gap(incombustible fabric + glass wool,mineral wool)=52,68,1

(Fig. 3-41) Absorption coefficient according to thickness of air-gap(scrub stem)=53,69,1

(fig. 3-42) Absorption coefficient according to thickness of air-gap of faced materials=54,70,1

(Fig. 3-43) Correlation between noise reduction coefficient and weighted sound absorption coefficient=59,75,1

(Fig. 3-44) Comparison of absorption coefficient measured by NIER and other institutes without air-gap=62,78,1

(Fig. 3-45) Comparison of absorption coefficient measured by NIER and other institutes with 50 mm air-gap=63,79,1

(Fig. 3-46) Comparison of absorption coefficient by reverberation method and impedance tube method=65,81,2

(Fig. 3-47) Absorptive performance of noise barrier=68,84,1

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