# Jet Twin audio attribution

Real jet-engine recordings used by `jet-audio.js`:

| File | Source | License / notes |
|---|---|---|
| `rotor-fan.mp3` | NASA Langley Applied Acoustics — AIAA-2005-2983 Web Clip 11 (jet STL + fan tones), derived from [stabserv.larc.nasa.gov/flyover](https://stabserv.larc.nasa.gov/flyover/) | U.S. government work / NASA research auralization package. No NASA endorsement implied. |
| `rotor-jet.mp3` | NASA Langley — AIAA-2004-1029 **Recorded jet noise** (`recd_jet_noise-mic28_short.wav`) | Same. Wind-tunnel measured jet noise. |
| `rotor-core.mp3` | NASA Langley — AIAA-2004-1029 **Synthesized jet noise with temporal variations** | Same. Used as combustor/core rumble layer. |

Encoded to mono MP3 for the web twin. Playback rate and mix are driven by the live Brayton solve (throttle / spool / Ve / TIT). Still **illustrative** staging of real source material, not a certified auralization of this micro-turbojet.