{ "sweep": { "id": "strike-position", "title": "Drumstick: strike position", "text": "Where the sheet is struck decides which modes are excited: a strike at the center excites only modes that are symmetric about both axes, while a strike near an edge or a corner excites the twisting and edge modes as well.", "base": { "excitation": "strike" }, "clips": [ { "label": "center", "params": { "strikeFracX": 0.5, "strikeFracY": 0.5 } }, { "label": "off-center (default)", "params": { "strikeFracX": 0.7, "strikeFracY": 0.35 } }, { "label": "near the right edge", "params": { "strikeFracX": 0.95, "strikeFracY": 0.5 } }, { "label": "near a corner", "params": { "strikeFracX": 0.92, "strikeFracY": 0.08 } } ] }, "gainDb": 20, "clips": [ { "id": "strike-position-0", "label": "center", "overrides": { "excitation": "strike", "strikeFracX": 0.5, "strikeFracY": 0.5 }, "metrics": { "peakPa": 4.090140342712402, "peakDbSpl": 106.21416428608427, "rmsPa": 0.017414943497971586, "centroidHz": 449.3720005711135, "t60": { "20-100": 5.507011553639136, "100-500": 4.742222884858844, "500-2k": 2.4498227913617256, "2k-8k": 3.8812279635413325 }, "bandLevelsDb": { "20-100": -8.242444869098549, "100-500": 0, "500-2k": -1.3819603260077429, "2k-8k": -2.7869660531175313 } }, "gainDb": 20, "peakDbfs": 32.23476419936389, "run": { "steps": 3072000, "seconds": 33.197286171000016, "nx": 39, "ny": 58, "dt": 0.0000013020833333333333, "maxContactForce": 194.9879608154297 } }, { "id": "strike-position-1", "label": "off-center (default)", "overrides": { "excitation": "strike", "strikeFracX": 0.7, "strikeFracY": 0.35 }, "metrics": { "peakPa": 2.552067756652832, "peakDbSpl": 102.11724409859474, "rmsPa": 0.010939866293578663, "centroidHz": 654.5269112833041, "t60": { "20-100": 5.084050764268366, "100-500": 4.166515631486475, "500-2k": 2.5109722913953734, "2k-8k": 4.596561207548714 }, "bandLevelsDb": { "20-100": -10.075329770223362, "100-500": 0, "500-2k": 1.0910838167922776, "2k-8k": -0.46759244010335266 } }, "gainDb": 20, "peakDbfs": 28.13784401187437, "run": { "steps": 3072000, "seconds": 33.08529265699998, "nx": 39, "ny": 58, "dt": 0.0000013020833333333333, "maxContactForce": 195.15817260742188 } }, { "id": "strike-position-2", "label": "near the right edge", "overrides": { "excitation": "strike", "strikeFracX": 0.95, "strikeFracY": 0.5 }, "metrics": { "peakPa": 2.0260727405548096, "peakDbSpl": 100.1125007557196, "rmsPa": 0.009846177464463899, "centroidHz": 457.3865316122065, "t60": { "20-100": 5.380793195966296, "100-500": 4.249767131031015, "500-2k": 2.422769592299953, "2k-8k": 4.487254634529499 }, "bandLevelsDb": { "20-100": -5.746870054845811, "100-500": 0, "500-2k": -0.9576882448219131, "2k-8k": -2.190169031270461 } }, "gainDb": 20, "peakDbfs": 26.13310066899922, "run": { "steps": 3072000, "seconds": 33.18327378399999, "nx": 39, "ny": 58, "dt": 0.0000013020833333333333, "maxContactForce": 190.2689208984375 } }, { "id": "strike-position-3", "label": "near a corner", "overrides": { "excitation": "strike", "strikeFracX": 0.92, "strikeFracY": 0.08 }, "metrics": { "peakPa": 2.6406617164611816, "peakDbSpl": 102.41365547106997, "rmsPa": 0.012986906324117349, "centroidHz": 539.8610576204195, "t60": { "20-100": 5.031269853074107, "100-500": 4.657374851267341, "500-2k": 2.6397616245726754, "2k-8k": 4.413791387848751 }, "bandLevelsDb": { "20-100": -7.612234909855623, "100-500": 0, "500-2k": -0.5897316266875166, "2k-8k": -1.4461924028059059 } }, "gainDb": 20, "peakDbfs": 28.4342553843496, "run": { "steps": 3072000, "seconds": 33.160981005999986, "nx": 39, "ny": 58, "dt": 0.0000013020833333333333, "maxContactForce": 196.79904174804688 } } ] }