PUZZLE #3509: Resonant Cavity Cipher [Helmholtz] (diff 6)

chime learn difficulty: 6/7 simulate author: system unsolved

Helmholtz resonator cavities. 11 cavities = 11-char word.

DATA

Difficulty	`6`
N Cols	`11`
N Chars	`36`
Cavities	{'neck_area_m2': 2.867e-05, 'neck_length_m': 0.016347, 'volume_m3': 0.0001648, 'resonant_freq_hz': 174.4868, 'neck_radius_m': 0.003021}, {'neck_area_m2': 7.785e-05, 'neck_length_m': 0.010045, 'volume_m3': 0.00016841, 'resonant_freq_hz': 347.8049, 'neck_radius_m': 0.004978}, {'neck_area_m2': 6.6e-06, 'neck_length_m': 0.006214, 'volume_m3': 0.00011061, 'resonant_freq_hz': 164.6135, 'neck_radius_m': 0.001449}, {'neck_area_m2': 4.944e-05, 'neck_length_m': 0.016931, 'volume_m3': 7.598e-05, 'resonant_freq_hz': 329.2762, 'neck_radius_m': 0.003967}, {'neck_area_m2': 0.00025936, 'neck_length_m': 0.016887, 'volume_m3': 0.00023371, 'resonant_freq_hz': 413.3386, 'neck_radius_m': 0.009086}, {'neck_area_m2': 1.657e-05, 'neck_length_m': 0.008222, 'volume_m3': 0.00020733, 'resonant_freq_hz': 164.5624, 'neck_radius_m': 0.002297}, {'neck_area_m2': 8.856e-05, 'neck_length_m': 0.023084, 'volume_m3': 0.00014133, 'resonant_freq_hz': 276.8983, 'neck_radius_m': 0.005309}, {'neck_area_m2': 3.184e-05, 'neck_length_m': 0.026071, 'volume_m3': 0.00016512, 'resonant_freq_hz': 146.7771, 'neck_radius_m': 0.003184}, {'neck_area_m2': 7.839e-05, 'neck_length_m': 0.023793, 'volume_m3': 0.00021743, 'resonant_freq_hz': 207.4655, 'neck_radius_m': 0.004995}, {'neck_area_m2': 2.018e-05, 'neck_length_m': 0.01369, 'volume_m3': 0.00015547, 'resonant_freq_hz': 164.6878, 'neck_radius_m': 0.002534}, {'neck_area_m2': 8.078e-05, 'neck_length_m': 0.011219, 'volume_m3': 0.00014084, 'resonant_freq_hz': 368.6916, 'neck_radius_m': 0.005071}
Note Base Hz	`130.81`
Note Base Name	`C3`
Temp C	`23.5`
Neck Flange	`unflanged`
Hint	`T = 23.5°C. End correction: δ=0.30·r (unflanged).`
Answer Format	`single lowercase letter`

{
  "type": "chime",
  "difficulty": 6,
  "n_cols": 11,
  "n_chars": 36,
  "cavities": [
    {
      "neck_area_m2": 2.867e-05,
      "neck_length_m": 0.016347,
      "volume_m3": 0.0001648,
      "resonant_freq_hz": 174.4868,
      "neck_radius_m": 0.003021
    },
    {
      "neck_area_m2": 7.785e-05,
      "neck_length_m": 0.010045,
      "volume_m3": 0.00016841,
      "resonant_freq_hz": 347.8049,
      "neck_radius_m": 0.004978
    },
    {
      "neck_area_m2": 6.6e-06,
      "neck_length_m": 0.006214,
      "volume_m3": 0.00011061,
      "resonant_freq_hz": 164.6135,
      "neck_radius_m": 0.001449
    },
    {
      "neck_area_m2": 4.944e-05,
      "neck_length_m": 0.016931,
      "volume_m3": 7.598e-05,
      "resonant_freq_hz": 329.2762,
      "neck_radius_m": 0.003967
    },
    {
      "neck_area_m2": 0.00025936,
      "neck_length_m": 0.016887,
      "volume_m3": 0.00023371,
      "resonant_freq_hz": 413.3386,
      "neck_radius_m": 0.009086
    },
    {
      "neck_area_m2": 1.657e-05,
      "neck_length_m": 0.008222,
      "volume_m3": 0.00020733,
      "resonant_freq_hz": 164.5624,
      "neck_radius_m": 0.002297
    },
    {
      "neck_area_m2": 8.856e-05,
      "neck_length_m": 0.023084,
      "volume_m3": 0.00014133,
      "resonant_freq_hz": 276.8983,
      "neck_radius_m": 0.005309
    },
    {
      "neck_area_m2": 3.184e-05,
      "neck_length_m": 0.026071,
      "volume_m3": 0.00016512,
      "resonant_freq_hz": 146.7771,
      "neck_radius_m": 0.003184
    },
    {
      "neck_area_m2": 7.839e-05,
      "neck_length_m": 0.023793,
      "volume_m3": 0.00021743,
      "resonant_freq_hz": 207.4655,
      "neck_radius_m": 0.004995
    },
    {
      "neck_area_m2": 2.018e-05,
      "neck_length_m": 0.01369,
      "volume_m3": 0.00015547,
      "resonant_freq_hz": 164.6878,
      "neck_radius_m": 0.002534
    },
    {
      "neck_area_m2": 8.078e-05,
      "neck_length_m": 0.011219,
      "volume_m3": 0.00014084,
      "resonant_freq_hz": 368.6916,
      "neck_radius_m": 0.005071
    }
  ],
  "note_base_hz": 130.81,
  "note_base_name": "C3",
  "temp_c": 23.5,
  "neck_flange": "unflanged",
  "hint": "T = 23.5\u00b0C. End correction: \u03b4=0.30\u00b7r (unflanged).",
  "answer_format": "single lowercase letter"
}

author's note: Pool fill: chime diff 6