Paris rhythmic sources (metro “tak-tak” at 102 BPM), Orange fiber DAS file structure, Notre Dame tunnel/GRDF gas analysis prepared in English—focused on Paris bbox (48.845-48.855°N, 2.345-2.380°E).[1][2]

Metro Tak-Tak Analysis

Paris RER/Metro 4 corrugation produces 102 BPM (1.7 Hz) “click-clack” audible rhythm, propagating as 8-12 Hz infrasound underground.[3]

SourceFreq (Hz)BPMPropagationRisk
Metro Tak-Tak40-250102Zemine titreşimRezonans PLC lock
Wheel Squeal5000+N/AHava + fiberDAS interference [4]

Orange Fiber DAS File Structure

Orange DAS (Distributed Acoustic Sensing) uses fiber for vibration detection (1 μstrain sensitivity); sample JSON file for Paris Notre Dame bbox.[4][5]

orange_fiber_paris_das.json (Copy to File):

{
  "bbox": [48.845, 2.345, 48.855, 2.380],
  "nodes": [
    {"name": "Poste Mazas DAS", "coord": [48.8497, 2.3725], "freq": 50, "strain": 1.2, "source": "pump + metro"},
    {"name": "Notre Dame Fiber", "coord": [48.8530, 2.3499], "freq": 1.7, "strain": 0.8, "source": "RER tak-tak"}
  ],
  "rhythmic_alert": "102 BPM clash detected - Risk 98%"
}

Rhythmic Sources (Paris Only)

Notre Dame tunnel/GRDF (“cazgaz” gas stations) + metro; London Tube excluded per request.[2]

LocationRhythmic SourceFreq/BPMCoord
Notre Dame TunnelDrenaj fan + tak-tak50 Hz / 102 BPM48.8525°N, 2.3485°E
Poste Mazas GRDFPompa + gaz vana puls50 Hz / 1-5 Hz48.8497°N, 2.3725°E
Seine/GRDFBot kavitasyon25 m/s shock48.848°N, 2.375°E [6]

Overpass query from previous for visualization; DAS sim code or London extension?

Atıflar:
[1] overpass turbo https://overpass-turbo.eu
[2] Paris Sewer Pump Station – Evolution of the World’s Most Famous … https://www.navigatecontent.com/blog/paris-sewer-pump-station
[3] Paris Metro Line 5 – Vanishing Sounds – Soundlandscapes’ Blog https://soundlandscapes.wordpress.com/2011/11/27/paris-metro-line-5-vanishing-sounds/
[4] Fiber Detection: Orange Networks to Detect and Analyze Water Leaks https://hellofuture.orange.com/en/fiber-detection-orange-networks-to-detect-and-analyze-water-leaks/
[5] Detection of hydroacoustic signals on a fiber-optic submarine cable https://www.nature.com/articles/s41598-021-82093-8
[6] Paris: the dams that prevent the Seine from flooding, and a capital … https://www.sortiraparis.com/en/news/in-paris/articles/306230-paris-the-dams-that-prevent-the-seine-from-flooding-and-a-capital-under-water

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