| Business | Phone |
| Mjm Conseillers & Acoustique 6555 Ch De La Cote-Des-Neiges #440, Montreal H3S 2A6 | (514) 737-9811 |
| Otologie Industrielle Rab 5995 Boul Gouin O #302, Montreal H4J 2P8 | (514) 332-2050 |
| Silentec Consultants 11815 Av Adolphe-Caron, Montreal H1E 6J8 | (514) 731-3397 |
| Sound Design & Construction 5652 Av Mclynn, Montreal H3X 2R1 | (514) 343-9909 |