1{
2 "sweep": {
3 "id": "damping-sigma1-strike",
4 "title": "Damping: frequency-dependent loss (drumstick strike)",
5 "text": "The same sweep excited by the default drumstick strike (30 g at 3 m/s) instead of the corner push. Struck, the difference is more audible: the lowest value gives a long metallic ring with a centroid near 3.8 kHz, and the highest a dull thud with a centroid near 220 Hz.",
6 "param": "sigma1",
7 "unit": "m^2/s",
8 "values": [
9 0.0001,
10 0.0005,
11 0.0025
12 ],
13 "base": {
14 "excitation": "strike"
15 }
16 },
17 "gainDb": 20,
18 "clips": [
19 {
20 "id": "damping-sigma1-strike-0",
21 "label": "0.0001 m^2/s",
22 "overrides": {
23 "excitation": "strike",
24 "sigma1": 0.0001
25 },
26 "metrics": {
27 "peakPa": 2.551717758178711,
28 "peakDbSpl": 102.11605280710508,
29 "rmsPa": 0.013507031377356166,
30 "centroidHz": 3839.352613151534,
31 "t60": {
32 "20-100": 5.821236263946769,
33 "100-500": 5.602493143480276,
34 "500-2k": 4.076402899967895,
35 "2k-8k": 2.722997832328978
36 },
37 "bandLevelsDb": {
38 "20-100": -9.426444529205426,
39 "100-500": 0,
40 "500-2k": 1.7451840397867748,
41 "2k-8k": 9.356600479990558
42 }
43 },
44 "gainDb": 20,
45 "peakDbfs": 28.136652720384696,
46 "run": {
47 "steps": 3072000,
48 "seconds": 33.18437062000017,
49 "nx": 39,
50 "ny": 58,
51 "dt": 0.0000013020833333333333,
52 "maxContactForce": 195.1881103515625
53 }
54 },
55 {
56 "id": "damping-sigma1-strike-1",
57 "label": "0.0005 m^2/s",
58 "overrides": {
59 "excitation": "strike",
60 "sigma1": 0.0005
61 },
62 "metrics": {
63 "peakPa": 2.552067756652832,
64 "peakDbSpl": 102.11724409859474,
65 "rmsPa": 0.010939866293578663,
66 "centroidHz": 654.5269112833041,
67 "t60": {
68 "20-100": 5.084050764268366,
69 "100-500": 4.166515631486475,
70 "500-2k": 2.5109722913953734,
71 "2k-8k": 4.596561207548714
72 },
73 "bandLevelsDb": {
74 "20-100": -10.075329770223362,
75 "100-500": 0,
76 "500-2k": 1.0910838167922776,
77 "2k-8k": -0.46759244010335266
78 }
79 },
80 "gainDb": 20,
81 "peakDbfs": 28.13784401187437,
82 "run": {
83 "steps": 3072000,
84 "seconds": 33.21743657099968,
85 "nx": 39,
86 "ny": 58,
87 "dt": 0.0000013020833333333333,
88 "maxContactForce": 195.15817260742188
89 }
90 },
91 {
92 "id": "damping-sigma1-strike-2",
93 "label": "0.0025 m^2/s",
94 "overrides": {
95 "excitation": "strike",
96 "sigma1": 0.0025
97 },
98 "metrics": {
99 "peakPa": 2.5538177490234375,
100 "peakDbSpl": 102.12319810644581,
101 "rmsPa": 0.0099934666501431,
102 "centroidHz": 218.21895282188223,
103 "t60": {
104 "20-100": 4.201505613612357,
105 "100-500": 2.797687170302254,
106 "500-2k": 2.5383952930626466,
107 "2k-8k": 35.645270253740456
108 },
109 "bandLevelsDb": {
110 "20-100": -8.423468312066696,
111 "100-500": 0,
112 "500-2k": -5.57064684973504,
113 "2k-8k": -29.096278467698475
114 }
115 },
116 "gainDb": 20,
117 "peakDbfs": 28.14379801972544,
118 "run": {
119 "steps": 3072000,
120 "seconds": 33.22371701700008,
121 "nx": 39,
122 "ny": 58,
123 "dt": 0.0000013020833333333333,
124 "maxContactForce": 195.00987243652344
125 }
126 }
127 ]
128}