add C4DM

README.md

@@ -11,3 +11,4 @@ A list of publicly available acoustic/room impulse response (AIR/RIR) datasets.
 | [OpenAIR](https://www.openairlib.net/) | Ambisonic B format RIRs recorded in over 46 (still increasing) environments | 2010 | [Openair: An interactive auralization web resource and database](https://www.aes.org/e-lib/browse.cfm?elib=15648) |
 | [Aachen impulse response database](http://www.iks.rwth-aachen.de/en/research/tools-downloads/databases/aachen-impulse-response-database/) | 344 binaural RIRs measured with a dummy head in 5 environments including a church | 2009 | [A Binaural Room Impulse Response Database for the Evaluation of Dereverberation Algorithms](https://ieeexplore.ieee.org/abstract/document/5201259) |
 | [RWCP Sound Scene Database](http://research.nii.ac.jp/src/en/RWCP-SSD.html) | 143 multi-channel RIRs recorded in 14 rooms | 2000 | [Sound scene data collection in real acoustical environments](https://library.naist.jp/dspace/bitstream/handle/10061/7746/JourAcouSocJaE_20_3_225.pdf?sequence=1) |
+| [C4DM RIR database](http://isophonics.net/content/room-impulse-response-data-set) | 468 mono or ambisonic B format RIRs recorded in 3 large environments | 2000 | [Database of Omnidirectional and B-Format Impulse Responses](https://ieeexplore.ieee.org/document/5496083)