1{
2 "sweep": {
3 "id": "bow-amplitude",
4 "title": "Sheet: initial bow (push and release)",
5 "text": "Real sheet metal has a bow of a few millimetres, which makes it a shallow shell with an asymmetric stiffness. A flat plate has a symmetric, purely hardening nonlinearity; the bowed sheet moves energy out of the inaudible sub-50 Hz range into the audible partials and produces the slow wobble of a real sheet.",
6 "param": "bowAmplitude",
7 "unit": "mm",
8 "scale": 0.001,
9 "values": [
10 0,
11 0.0015,
12 0.003,
13 0.006
14 ]
15 },
16 "gainDb": 20,
17 "clips": [
18 {
19 "id": "bow-amplitude-0",
20 "label": "0 mm",
21 "overrides": {
22 "bowAmplitude": 0
23 },
24 "metrics": {
25 "peakPa": 0.018530940636992455,
26 "peakDbSpl": 59.33734938306809,
27 "rmsPa": 0.001388644325813247,
28 "centroidHz": 138.9772680798363,
29 "t60": {
30 "20-100": 5.40596094655707,
31 "100-500": 3.819770427107747,
32 "500-2k": 2.5190226429641105,
33 "2k-8k": 5.719996984810312
34 },
35 "bandLevelsDb": {
36 "20-100": 3.460446813870501,
37 "100-500": 0,
38 "500-2k": -17.439123839725028,
39 "2k-8k": -42.62007000620335
40 }
41 },
42 "gainDb": 20,
43 "peakDbfs": -14.642050703652295,
44 "run": {
45 "steps": 3072000,
46 "seconds": 38.22419604100008,
47 "nx": 39,
48 "ny": 58,
49 "dt": 0.0000013020833333333333,
50 "maxContactForce": 0
51 }
52 },
53 {
54 "id": "bow-amplitude-1",
55 "label": "1.5 mm",
56 "overrides": {
57 "bowAmplitude": 0.0015
58 },
59 "metrics": {
60 "peakPa": 0.020424241200089455,
61 "peakDbSpl": 60.18231869926915,
62 "rmsPa": 0.0019242604968380084,
63 "centroidHz": 150.61640608909013,
64 "t60": {
65 "20-100": 5.460361387120384,
66 "100-500": 3.900035197231288,
67 "500-2k": 2.536623163865745,
68 "2k-8k": 5.836896374715746
69 },
70 "bandLevelsDb": {
71 "20-100": 2.3772095277434886,
72 "100-500": 0,
73 "500-2k": -12.252782511894985,
74 "2k-8k": -45.02134490787171
75 }
76 },
77 "gainDb": 20,
78 "peakDbfs": -13.797081387451222,
79 "run": {
80 "steps": 3072000,
81 "seconds": 38.296715861,
82 "nx": 39,
83 "ny": 58,
84 "dt": 0.0000013020833333333333,
85 "maxContactForce": 0
86 }
87 },
88 {
89 "id": "bow-amplitude-2",
90 "label": "3 mm",
91 "overrides": {
92 "bowAmplitude": 0.003
93 },
94 "metrics": {
95 "peakPa": 0.04646482318639755,
96 "peakDbSpl": 67.32188586389826,
97 "rmsPa": 0.0033498771907116485,
98 "centroidHz": 195.7169225189091,
99 "t60": {
100 "20-100": 5.414347622298749,
101 "100-500": 4.0120593180726445,
102 "500-2k": 2.724403865668108,
103 "2k-8k": 7.678595678417119
104 },
105 "bandLevelsDb": {
106 "20-100": -1.153481711330091,
107 "100-500": 0,
108 "500-2k": -6.774905483785499,
109 "2k-8k": -41.19767338483816
110 }
111 },
112 "gainDb": 20,
113 "peakDbfs": -6.657514222822115,
114 "run": {
115 "steps": 3072000,
116 "seconds": 38.37281498499995,
117 "nx": 39,
118 "ny": 58,
119 "dt": 0.0000013020833333333333,
120 "maxContactForce": 0
121 }
122 },
123 {
124 "id": "bow-amplitude-3",
125 "label": "6 mm",
126 "overrides": {
127 "bowAmplitude": 0.006
128 },
129 "metrics": {
130 "peakPa": 0.05146374553442001,
131 "peakDbSpl": 68.20942790676992,
132 "rmsPa": 0.003868781695405247,
133 "centroidHz": 260.49211658030276,
134 "t60": {
135 "20-100": 4.983307515922108,
136 "100-500": 4.685646135490641,
137 "500-2k": 2.440539912981983,
138 "2k-8k": 18.996539591386778
139 },
140 "bandLevelsDb": {
141 "20-100": -12.16321143704782,
142 "100-500": 0,
143 "500-2k": -13.892336138110384,
144 "2k-8k": -45.14339851082234
145 }
146 },
147 "gainDb": 20,
148 "peakDbfs": -5.7699721799504555,
149 "run": {
150 "steps": 3072000,
151 "seconds": 38.30926785599999,
152 "nx": 39,
153 "ny": 58,
154 "dt": 0.0000013020833333333333,
155 "maxContactForce": 0
156 }
157 }
158 ]
159}