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All issues Volume 7 (2023) Acta Acust., 7 (2023) 8 Full HTML
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Table 2

Overview of all initially considered walls and their properties (code name of walls is composed from order_type_ _Rw of analyzed walls). Acronyms LW stands for Lightweight walls, HW is for masonry walls and Combined means masonry walls with plaster boards lining system. Walls indicated in “bold font” had extreme properties (either having too poor insulation for separating dwelling apartments or having insulation so high that the transmitted sound was below hearing threshold) were discarded for the correlation analysis.

Code name Weighted sound reduction index Spectrum C (Pink noise weighted by A) Pink noise weighted by isophone 40 Indoor spectrum weighted by A filter Indoor spectrum weighted by isophone 40 Loudness
Pink noise
 Indoor noise
R w
Rw + C 50 – 5000
 Rw + C100 – 3150
 Rw + C50 – 3150
 Rw + C100 – 5000
 Rw + I40
 Rw + indoora
 Rw + indoor40
 N
N
dB dB dB dB dB dB dB dB Sone Sone
1_LW_33 33 33 32 32 33 34 34 34 4,160 3,830
2_LW_36 36 36 35 35 36 37 37 38 3,840 3,440
3_HW_39 39 39 38 38 39 40 41 41 2,700 2,320
4_LW_41 41 39 39 38 39 42 44 44 2,710 2,000
5_HW_42 42 42 42 42 43 43 43 44 2,270 2,030
6_LW_43 43 39 40 38 40 43 46 46 2,380 1,590
7_HW_45 45 45 45 44 45 45 45 45 1,900 1,760
8_LW_47 47 46 46 45 46 48 48 49 1,350 1,090
9_HW_52 52 51 51 50 51 53 53 54 0,653 0,517
10_LW_53 53 45 51 44 51 51 55 58 1,140 0,513
11_HW_53 53 52 52 52 53 53 53 53 0,694 0,590
12_HW_53 53 53 52 52 53 53 54 53 0,672 0,560
13_HW_53 53 53 52 52 53 53 53 53 0,662 0,557
14_LW_55 55 53 53 52 53 56 57 59 0,472 0,291
15_combined_55 55 53 52 52 53 56 59 61 0,457 0,251
16_HW_56 56 55 55 55 55 55 56 56 0,419 0,350
17_HW_56 56 55 55 55 56 56 57 57 0,402 0,322
18_HW_56 56 55 54 54 55 57 59 60 0,359 0,237
19_HW_57 57 56 56 55 56 59 60 61 0,295 0,184
20_HW_59 59 57 57 56 58 61 63 64 0,235 0,106
21_HW_59 59 58 58 57 58 60 62 63 0,205 0,122
22_combined_59 59 59 58 58 59 61 62 64 0,185 0,107
23_HW_60 60 59 58 58 59 61 63 64 0,185 0,100
24_combined_61 61 59 59 58 60 62 64 65 0,180 0,079
25_combined_61 61 59 60 58 61 63 65 66 0,156 0,059
26_combined_63 63 58 58 57 59 63 66 70 0,195 0,059
27_combined_64 64 60 59 59 60 64 68 72 0,150 0,041
28_LW_65 65 55 63 54 64 62 66 70 0,240 0,039
29_combined_66 66 59 61 58 62 65 69 73 0,150 0,021
30_LW_66 66 58 64 57 65 65 69 73 0,111 0,006
31_combined_67 67 59 61 58 62 65 69 73 0,137 0,011
32_LW_67 67 59 65 58 66 65 69 73 0,102 0,004
33_HW_67 67 64 64 63 65 69 72 76 0,048 0,000
34_combined_68 68 62 65 61 66 68 71 75 0,070 0,002
35_combined_68 68 65 66 64 67 69 72 74 0,026 0,000
36_LW_69 69 52 66 51 65 59 64 67 0,393 0,076
37_combined_70 70 62 67 61 67 68 72 76 0,060 0,000
38_combined_70 70 67 68 66 69 71 73 75 0,006 0,000
39_LW_71 71 59 69 58 70 66 71 73 0,062 0,000
40_combined_71 71 62 68 61 68 68 72 76 0,046 0,000
41_LW_72 72 57 68 56 66 63 66 66 0,143 0,000
42_combined_72 72 62 69 61 70 69 73 77 0,043 0,000
43_combined_72 72 62 69 61 70 69 73 77 0,036 0,000
44_LW_74 74 64 72 63 73 71 76 80 0,014 0,000
45_LW_76 76 65 73 65 71 69 72 71 0,007 0,000

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