{
  "title": "Hearably equal-peak loudness example",
  "methodVersion": 1,
  "createdDate": "2026-09-19",
  "provenance": "Original synthesized 480 Hz signals generated by Hearably; no third-party recordings.",
  "generator": "https://hearably.app/audio/loudness-lab/generate-loudness-example.py",
  "meter": "ffmpeg version 9.0.1 Copyright (c) 2000-2026 the FFmpeg developers",
  "meterMethod": "FFmpeg ebur128 integrated loudness with true-peak estimation; default gating; whole mono file. Summary readings rounded by FFmpeg to 0.1.",
  "signals": "Steady tone versus repeating 0.5 s envelope: 0.10 s full, 0.38 s quarter amplitude, two 0.01 s cosine transitions. Both have 0.02 s edge fades. Peak PCM amplitude 4096/32768.",
  "limitations": [
    "Synthetic measurement illustration; not an extension, streaming-platform or listening-device benchmark.",
    "Mono measurement; playback routes, channel mapping and device volume affect what listeners hear.",
    "Measured with the named FFmpeg implementation, not independently certified as a BS.1770-5 conformance test."
  ],
  "files": [
    {
      "file": "steady.wav",
      "sha256": "51b1d0a7c105f686c968cf787da42ee33cd16674cbc9b7cb7293e74dac9e199e",
      "bytes": 960044,
      "durationSeconds": 10,
      "sampleRateHz": 48000,
      "channels": 1,
      "encoding": "16-bit PCM WAV",
      "samplePeakDbFS": -18.062,
      "rmsDbFS": -21.084,
      "integratedLUFS": -21.7,
      "truePeakDbTP": -18.1,
      "meterCommand": [
        "ffmpeg",
        "-hide_banner",
        "-nostats",
        "-i",
        "steady.wav",
        "-af",
        "ebur128=peak=true",
        "-f",
        "null",
        "-"
      ]
    },
    {
      "file": "pulsed.wav",
      "sha256": "1b24148b3017723bafd5cc8bd3d091e2190a6b95382543efffb0757b80bc8741",
      "bytes": 960044,
      "durationSeconds": 10,
      "sampleRateHz": 48000,
      "channels": 1,
      "encoding": "16-bit PCM WAV",
      "samplePeakDbFS": -18.062,
      "rmsDbFS": -26.854,
      "integratedLUFS": -27.5,
      "truePeakDbTP": -18.1,
      "meterCommand": [
        "ffmpeg",
        "-hide_banner",
        "-nostats",
        "-i",
        "pulsed.wav",
        "-af",
        "ebur128=peak=true",
        "-f",
        "null",
        "-"
      ]
    }
  ]
}