Air-column resonance

Code-Snippets

curl "https://api.oanor.com/standingwave-api/v1/pipe" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/standingwave-api/v1/pipe", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/standingwave-api/v1/pipe");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/standingwave-api/v1/pipe",
    headers={"x-oanor-key": "oanor_test_..."}
)

Beispiel-Response

Echte Antwort dieses Endpoints, erfasst beim letzten Health-Check.

{
    "data": {
        "system": "open pipe (both ends open — all harmonics)",
        "formula": "f_n = n·v/(2L); open pipes resonate at all harmonics.",
        "length_m": 0.5,
        "harmonics": [
            {
                "index": 1,
                "nodes": 2,
                "antinodes": 1,
                "frequency_hz": 343.214623,
                "wavelength_m": 1,
                "harmonic_number": 1
            },
            {
                "index": 2,
                "nodes": 3,
                "antinodes": 2,
                "frequency_hz": 686.429245,
                "wavelength_m": 0.5,
                "harmonic_number": 2
            },
            {
                "index": 3,
                "nodes": 4,
                "antinodes": 3,
                "frequency_hz": 1029.643868,
                "wavelength_m": 0.33333333,
                "harmonic_number": 3
            },
            {
                "index": 4,
                "nodes": 5,
                "antinodes": 4,
                "frequency_hz": 1372.858491,
                "wavelength_m": 0.25,
                "harmonic_number": 4
            },
            {
                "index": 5,
                "nodes": 6,
                "antinodes": 5,
                "frequency_hz": 1716.073113,
                "wavelength_m": 0.2,
                "harmonic_number": 5
            },
            {
                "index": 6,
                "nodes": 7,
                "antinodes": 6,
                "frequency_hz": 2059.287736,
                "wavelength_m": 0.16666667,
                "harmonic_number": 6
            }
        ],
        "speed_source": "air at 20°C",
        "speed_of_sound_ms": 343.214623,
        "fundamental_frequency_hz": 343.214623,
        "fundamental_wavelength_m": 1
    },
    "meta": {
        "timestamp": "2026-06-04T10:18:52.599Z",
        "request_id": "ff2eb46f-fef4-4516-8fbd-ad476e2472d6"
    },
    "status": "ok",
    "message": "Air-column resonance",
    "success": true
}