1{
2 "sweep": {
3 "id": "strike-stiffness",
4 "title": "Drumstick: tip hardness",
5 "text": "The Hertz contact stiffness K stands for the hardness of the tip: a soft (rubber or felt) tip has a low K and a long, gentle contact that excites mainly the low modes; a hard tip (dense wood, or a metal beater) has a high K and a sharp click.",
6 "base": {
7 "excitation": "strike"
8 },
9 "param": "contactStiffness",
10 "unit": "N/m^1.5",
11 "values": [
12 5000000,
13 50000000,
14 500000000,
15 5000000000
16 ]
17 },
18 "gainDb": 20,
19 "clips": [
20 {
21 "id": "strike-stiffness-0",
22 "label": "5000000 N/m^1.5",
23 "overrides": {
24 "excitation": "strike",
25 "contactStiffness": 5000000
26 },
27 "metrics": {
28 "peakPa": 0.3804190754890442,
29 "peakDbSpl": 85.58464580260228,
30 "rmsPa": 0.005133101743062823,
31 "centroidHz": 374.5739194810616,
32 "t60": {
33 "20-100": 5.682845037338983,
34 "100-500": 4.389427244465509,
35 "500-2k": 2.5182583805850713,
36 "2k-8k": 4.680011457217637
37 },
38 "bandLevelsDb": {
39 "20-100": -7.648029582701312,
40 "100-500": 0,
41 "500-2k": 0.2754585609741902,
42 "2k-8k": -13.075716061300339
43 }
44 },
45 "gainDb": 20,
46 "peakDbfs": 11.605245715881907,
47 "run": {
48 "steps": 3072000,
49 "seconds": 33.748852703,
50 "nx": 39,
51 "ny": 58,
52 "dt": 0.0000013020833333333333,
53 "maxContactForce": 112.61978912353516
54 }
55 },
56 {
57 "id": "strike-stiffness-1",
58 "label": "50000000 N/m^1.5",
59 "overrides": {
60 "excitation": "strike",
61 "contactStiffness": 50000000
62 },
63 "metrics": {
64 "peakPa": 1.4359854459762573,
65 "peakDbSpl": 97.12240085191797,
66 "rmsPa": 0.00793854978704168,
67 "centroidHz": 677.3112252388133,
68 "t60": {
69 "20-100": 5.78500064678424,
70 "100-500": 4.048410604767264,
71 "500-2k": 2.484841151409641,
72 "2k-8k": 4.4317011614592925
73 },
74 "bandLevelsDb": {
75 "20-100": -6.860859620797564,
76 "100-500": 0,
77 "500-2k": 3.7173941121677316,
78 "2k-8k": -2.0785887087875885
79 }
80 },
81 "gainDb": 20,
82 "peakDbfs": 23.14300076519761,
83 "run": {
84 "steps": 3072000,
85 "seconds": 33.219109988999996,
86 "nx": 39,
87 "ny": 58,
88 "dt": 0.0000013020833333333333,
89 "maxContactForce": 147.958984375
90 }
91 },
92 {
93 "id": "strike-stiffness-2",
94 "label": "500000000 N/m^1.5",
95 "overrides": {
96 "excitation": "strike",
97 "contactStiffness": 500000000
98 },
99 "metrics": {
100 "peakPa": 2.552067756652832,
101 "peakDbSpl": 102.11724409859474,
102 "rmsPa": 0.010939866293578663,
103 "centroidHz": 654.5269112833041,
104 "t60": {
105 "20-100": 5.084050764268366,
106 "100-500": 4.166515631486475,
107 "500-2k": 2.5109722913953734,
108 "2k-8k": 4.596561207548714
109 },
110 "bandLevelsDb": {
111 "20-100": -10.075329770223362,
112 "100-500": 0,
113 "500-2k": 1.0910838167922776,
114 "2k-8k": -0.46759244010335266
115 }
116 },
117 "gainDb": 20,
118 "peakDbfs": 28.13784401187437,
119 "run": {
120 "steps": 3072000,
121 "seconds": 33.269960833000006,
122 "nx": 39,
123 "ny": 58,
124 "dt": 0.0000013020833333333333,
125 "maxContactForce": 195.15817260742188
126 }
127 },
128 {
129 "id": "strike-stiffness-3",
130 "label": "5000000000 N/m^1.5",
131 "overrides": {
132 "excitation": "strike",
133 "contactStiffness": 5000000000
134 },
135 "metrics": {
136 "peakPa": 3.4693288803100586,
137 "peakDbSpl": 104.78430951471587,
138 "rmsPa": 0.015459878623562228,
139 "centroidHz": 562.5916770763948,
140 "t60": {
141 "20-100": 5.3772205987130315,
142 "100-500": 3.822684139794704,
143 "500-2k": 2.452117016164148,
144 "2k-8k": 4.458082216505916
145 },
146 "bandLevelsDb": {
147 "20-100": -9.102431932379966,
148 "100-500": 0,
149 "500-2k": 1.1269940318410363,
150 "2k-8k": -0.4054748933325456
151 }
152 },
153 "gainDb": 20,
154 "peakDbfs": 30.804909427995504,
155 "run": {
156 "steps": 3072000,
157 "seconds": 33.254065699000016,
158 "nx": 39,
159 "ny": 58,
160 "dt": 0.0000013020833333333333,
161 "maxContactForce": 532.1395874023438
162 }
163 }
164 ]
165}