Add research license and clarify model metadata

LICENSE

@@ -0,0 +1,55 @@
+AcoustiTrace RT60 Evaluator Research License Notice
+Version 1.0, 24 August 2026
+
+Copyright (c) 2026 The AcoustiTrace Authors.
+
+The AcoustiTrace-created model artifacts in this repository are made available
+for non-commercial academic and research use, modification, and redistribution
+under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United
+States License (CC BY-NC-SA 3.0 US), subject to the upstream terms and notices
+below. Redistributions and derivatives must retain this notice and provide
+appropriate attribution to AcoustiTrace.
+
+UPSTREAM TERMS
+
+1. Matterport3D
+
+   The training supervision uses information derived from Matterport3D. Use of
+   this model is therefore also subject to the Matterport End User License
+   Agreement for Academic Use of Model Data, including its non-commercial
+   academic-use restriction:
+
+   https://matterport.com/legal/matterport-end-user-license-agreement-academic-use-model-data
+
+2. SoundSpaces 2.0
+
+   SoundSpaces is licensed under CC BY 4.0. Its documentation specifies that
+   Matterport3D-based task datasets and trained models remain subject to the
+   Matterport3D Terms of Use and CC BY-NC-SA 3.0 US:
+
+   https://github.com/facebookresearch/sound-spaces
+
+3. Qwen3-VL-8B-Instruct
+
+   The LoRA adapter is designed for Qwen/Qwen3-VL-8B-Instruct. The base model
+   is not included in this repository and is separately available under the
+   Apache License 2.0:
+
+   https://huggingface.co/Qwen/Qwen3-VL-8B-Instruct
+
+4. PTB Room Acoustics Absorption Coefficient Database
+
+   Absorption coefficients used in label construction originate from the PTB
+   Room Acoustics Absorption Coefficient Database:
+
+   https://www.ptb.de/cms/en/ptb/fachabteilungen/abt1/fb-16/ag-163/absorption-coefficient-database.html
+
+No Matterport3D images, SoundSpaces room data, PTB database files, or Qwen3-VL
+base weights are redistributed in this repository. Where an upstream term is
+more restrictive than this notice, the upstream term controls.
+
+THE MODEL ARTIFACTS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER
+LIABILITY ARISING FROM USE OF THE MODEL ARTIFACTS.

README.md

@@ -1,6 +1,8 @@
 ---
 base_model: Qwen/Qwen3-VL-8B-Instruct
-library_name: peft
+license: other
+license_name: acoustitrace-rt60-research-license
+license_link: https://huggingface.co/Missouter/AcoustiTrace-RT60/blob/main/LICENSE
 tags:
 - acoustitrace
 - audio-visual
@@ -50,6 +52,18 @@ The frozen base model is downloaded separately from
 `Qwen/Qwen3-VL-8B-Instruct`. Full evaluator setup and end-to-end commands are
 provided in the AcoustiTrace repository.
 
+## Training sources and license
+
+The RT60 supervision combines Matterport3D RGB-D observations, SoundSpaces 2.0
+room-acoustic simulation, and absorption coefficients from the PTB Room
+Acoustics Absorption Coefficient Database. No upstream training data is
+included in this repository.
+
+The model artifacts are available for non-commercial academic and research
+use under the terms in [LICENSE](LICENSE). In particular, use remains subject
+to the Matterport3D Academic Use Terms. The Qwen3-VL base model is separately
+licensed under Apache-2.0.
+
 ## Links
 
 - [Paper](https://arxiv.org/abs/2608.02035)