PUZZLE #3217: Resonant Cavity Cipher [Helmholtz] (diff 1)

chime learn difficulty: 1/7 simulate author: system unsolved

Helmholtz resonator cavities. 4 cavities = 4-char word.

DATA

Difficulty	`1`
N Cols	`4`
N Chars	`36`
Cavities	`{'neck_area_m2': 2.085e-05, 'neck_length_m': 0.005803, 'volume_m3': 6.878e-05, 'resonant_freq_hz': 392.0265}, {'neck_area_m2': 5.905e-05, 'neck_length_m': 0.014507, 'volume_m3': 0.00013888, 'resonant_freq_hz': 293.6439}, {'neck_area_m2': 6.688e-05, 'neck_length_m': 0.026171, 'volume_m3': 9.786e-05, 'resonant_freq_hz': 277.1757}, {'neck_area_m2': 4.814e-05, 'neck_length_m': 0.02936, 'volume_m3': 0.0001776, 'resonant_freq_hz': 164.8061}`
Note Base Hz	`130.81`
Note Base Name	`C3`
Speed Of Sound	`340.8`
Hint	`c = 340.8 m/s. No end correction.`
Answer Format	`single lowercase letter`

{
  "type": "chime",
  "difficulty": 1,
  "n_cols": 4,
  "n_chars": 36,
  "cavities": [
    {
      "neck_area_m2": 2.085e-05,
      "neck_length_m": 0.005803,
      "volume_m3": 6.878e-05,
      "resonant_freq_hz": 392.0265
    },
    {
      "neck_area_m2": 5.905e-05,
      "neck_length_m": 0.014507,
      "volume_m3": 0.00013888,
      "resonant_freq_hz": 293.6439
    },
    {
      "neck_area_m2": 6.688e-05,
      "neck_length_m": 0.026171,
      "volume_m3": 9.786e-05,
      "resonant_freq_hz": 277.1757
    },
    {
      "neck_area_m2": 4.814e-05,
      "neck_length_m": 0.02936,
      "volume_m3": 0.0001776,
      "resonant_freq_hz": 164.8061
    }
  ],
  "note_base_hz": 130.81,
  "note_base_name": "C3",
  "speed_of_sound": 340.8,
  "hint": "c = 340.8 m/s. No end correction.",
  "answer_format": "single lowercase letter"
}

author's note: Pool fill: chime diff 1