{ "sweep": { "id": "thickness", "title": "Sheet: thickness (push and release)", "text": "Bending stiffness grows with the cube of the thickness while mass grows linearly, so a thicker sheet has higher mode frequencies. The same 10 mm push, however, is a smaller multiple of the thickness, which weakens the nonlinear transfer of energy to the higher partials, and in these clips this effect wins: the sound becomes lower and purer with thickness even though the individual modes rise. Gauges 24, 22, 18 and 14.", "param": "h", "unit": "mm", "scale": 0.001, "values": [ 0.0006, 0.00079, 0.0012, 0.002 ] }, "gainDb": 20, "clips": [ { "id": "thickness-0", "label": "0.6 mm", "overrides": { "h": 0.0006 }, "metrics": { "peakPa": 0.026952091604471207, "peakDbSpl": 62.59124956773757, "rmsPa": 0.002090962013990021, "centroidHz": 187.85884592764293, "t60": { "20-100": 5.117754088625747, "100-500": 3.3526774124413747, "500-2k": 2.081227331078353, "2k-8k": 7.855228088791764 }, "bandLevelsDb": { "20-100": 0.1462256709363956, "100-500": 0, "500-2k": -6.3807161485354875, "2k-8k": -37.12333620963394 } }, "gainDb": 20, "peakDbfs": -11.388150518982805, "run": { "steps": 3072000, "seconds": 38.245727580999954, "nx": 39, "ny": 58, "dt": 0.0000013020833333333333, "maxContactForce": 0 } }, { "id": "thickness-1", "label": "0.79 mm", "overrides": { "h": 0.00079 }, "metrics": { "peakPa": 0.04646482318639755, "peakDbSpl": 67.32188586389826, "rmsPa": 0.0033498771907116485, "centroidHz": 195.7169225189091, "t60": { "20-100": 5.414347622298749, "100-500": 4.0120593180726445, "500-2k": 2.724403865668108, "2k-8k": 7.678595678417119 }, "bandLevelsDb": { "20-100": -1.153481711330091, "100-500": 0, "500-2k": -6.774905483785499, "2k-8k": -41.19767338483816 } }, "gainDb": 20, "peakDbfs": -6.657514222822115, "run": { "steps": 3072000, "seconds": 38.265609803, "nx": 39, "ny": 58, "dt": 0.0000013020833333333333, "maxContactForce": 0 } }, { "id": "thickness-2", "label": "1.2 mm", "overrides": { "h": 0.0012 }, "metrics": { "peakPa": 0.06922033429145813, "peakDbSpl": 70.78407393346563, "rmsPa": 0.005886171979845025, "centroidHz": 119.54543612933662, "t60": { "20-100": 5.101379763345999, "100-500": 4.853927820906208, "500-2k": 2.902751678289351, "2k-8k": 7.388775733659361 }, "bandLevelsDb": { "20-100": -0.8873422678845877, "100-500": 0, "500-2k": -9.86488395789507, "2k-8k": -49.137753294749736 } }, "gainDb": 20, "peakDbfs": -3.19532615325474, "run": { "steps": 3072000, "seconds": 38.32798625899991, "nx": 39, "ny": 58, "dt": 0.0000013020833333333333, "maxContactForce": 0 } }, { "id": "thickness-3", "label": "2 mm", "overrides": { "h": 0.002 }, "metrics": { "peakPa": 0.05244841426610947, "peakDbSpl": 68.37404733068118, "rmsPa": 0.007688486534950845, "centroidHz": 97.1825439315884, "t60": { "20-100": 5.653290712472623, "100-500": 5.1719473599191055, "500-2k": 3.7329840807753065, "2k-8k": 7.294525370435566 }, "bandLevelsDb": { "20-100": 1.5073678970733546, "100-500": 0, "500-2k": -29.525484906540118, "2k-8k": -43.00313024471482 } }, "gainDb": 20, "peakDbfs": -5.605352756039195, "run": { "steps": 3072000, "seconds": 38.265490640999985, "nx": 39, "ny": 58, "dt": 0.0000013020833333333333, "maxContactForce": 0 } } ] }