1{
2 "description": "The bell cymbal (cymbal-bell-v1 geometry, material and listener) played with three soft taps and then a hard crash, all within two seconds, ringing out to six seconds. Same solver and grid as the top of the bell chain (4 mm, 300 symmetric shell modes, two steps per sample), on the GPU. At the file's scale of 160 Pa the taps peak near 7 Pa and the crash near 60 Pa at the listener.",
3 "challenge_geometry": "cymbal-bell-v1",
4 "strikes": [
5 {
6 "t": 0.25,
7 "force": 150.0,
8 "duration": 0.0015,
9 "x": 0.17272,
10 "y": 0.0
11 },
12 {
13 "t": 0.65,
14 "force": 150.0,
15 "duration": 0.0015,
16 "x": 0.17272,
17 "y": 0.0
18 },
19 {
20 "t": 1.05,
21 "force": 150.0,
22 "duration": 0.0015,
23 "x": 0.17272,
24 "y": 0.0
25 },
26 {
27 "t": 1.6,
28 "force": 1000.0,
29 "duration": 0.001,
30 "x": 0.17272,
31 "y": 0.0
32 }
33 ],
34 "parameters": {
35 "grid_spacing_m": 0.004,
36 "cells": 8112,
37 "n_dof": 33268,
38 "transverse_modes": 300,
39 "basis_even_in_y": true,
40 "airy_modes": 300,
41 "oversampling": 2,
42 "dt_s": 1.0416666666666666e-05,
43 "highest_transverse_mode_hz": 14038.5
44 },
45 "signal_scale_pa": 160.0,
46 "peaks_pa": {
47 "0.25-0.65 s": 6.8,
48 "0.65-1.05 s": 8.42,
49 "1.05-1.6 s": 5.16,
50 "1.6-6.0 s": 44.69
51 },
52 "timing_seconds": 551.721,
53 "hardware": "Intel(R) Xeon(R) w5-3435X (32 threads), numpy/scipy for the setup; coupling tensor and time stepping on NVIDIA RTX 6000 Ada Generation (PyTorch 2.14.0+cu130)",
54 "note": "Experiment with a strike schedule; not a solution of any challenge."
55}