To read the executive summary of the research projects below simply click on the name of the project.

A research project conducted jointly with the National Research Council of Canada, and subsidized by the Central Mortgage and Housing Corporation of Canada. The objective of this project was to determine the acoustical performance of various types of ceiling material and installations and of several absorptive material used in the construction of floor/ceiling assemblies in wood construction. This report has been distributed across North America and is available upon request.

A research project conducted jointly with the National Research Council of Canada, and subsidized by the Central Mortgage and Housing Corporation of Canada. The objective of this project was to determine the acoustical performance of various plumbing equipments. This report has been distributed worldwide and is available upon request.

A research project conducted jointly with the National Research Council of Canada, and subsidized by the Central Mortgage and Housing Corporation of Canada. This project is a first attempt to validate a procedure using intensimetry to field measure the noise generated by fans. This report is available upon request.

A research project conducted jointly with the University of Concordia under the direction and supervision of MJM Acoustical Consultants inc. and subsidized by the Central Mortgage and Housing Corporation of Canada. The objective of this project was to test the acoustical performance of various types of doors and sound gaskets. The report of this research project is available in English upon request.

A research project conducted in fields conditions. The objective of this research project subsidized by the Central Mortgage and Housing Corporation of Canada was to determine the efficiency of different noise and vibration control devices which can be incoporated to garage doors to silence their operation. The report of this research project is available in French upon request.

A research project subsidized by the Canada Mortgage and Housing Corporaton. The objective of this project was to conduct the first phase of a research project in the development of a procedure for evaluating the degree of acoustic comfort provided in units in multi-family structures. The report of this research project is available in French upon request.

A research project conducted in the acoustical laboratory of the Domtar Research Center under the direction and supervision of MJM Acoustical Consultants inc. and subsidized by the Canada Mortgage and Housing Corporation. The objective of this project was to test the acoustical performance provided by various types of windows in residential projects. The report of this research project is available upon request.

A research project conducted in laboratory conditions. The objective of this research was to determine the sound attenuation properties of the most popular exterior walls in low and medium cost residential wood construction in Canada. The report of this resarch project is available upon request.

A research project conducted in the acoustical laboratory of the Domtar Research Center under the direction and supervision of MJM Acoustical Consultants inc. The objective of this research project was to caracterize the noise produced by water flowing inside DWV pipes made of CAST IRON, ABS and PVC pipes. All the test were conducted in the same experimental conditions which allows to directly compare the acoustical performance of the different pipes tested. The research report is available through Mr. Bill Monaghan of the Cast Iron and Soil Pipe Association at the following email address cispassoc@sympatico.ca.

In this publication, the results of over 350 sound transmission loss tests conducted on a wide variety of partitions constructed with gypsum board walls are analysed and compared. All the measurements were performed in the acoustical laboratories of the National Research Council of Canada, and the results of these measurements were published in IRC internal reports no IRC-IR-693 and no 761. MJM ACOUSTICAL CONSULTANTS INC. report is available in both French and English: to do so please contact Mr. Jacques Rousseau at the Canada Mortgage and Housing Corporation (Jacques_F_Rousseau@cmhcschl.gc.ca).

Several regulations and co-property acts allow condominium owners to install hard floor coverings provided that a minimum impact sound isolation rating is achieved. Many construction professionnls recommend such surfaces based on tests performed using the procedures described in ASTM E 492 or ASTM E 1007. During the present study, thirty-five bare concrete slabs with thicknesses ranging from 200 to 250 mm (8 to 10 in.) were randomly tested in different buildings in Montreal using the procedures outlined in ASTM E 1007. The large variations noted in the measured NISPLs and FIIC ratings suggest that the results of tests made in strict conformance with ASTM E 1007 are anecdotal and cannot be used by acousticians and construction professionals to predict the impact noise isolation provided by a floor covering installed on a "typical" 200 mm (8 in.) to 250 mm (10 in.) thick concrete slab. This paper presents the results of these measurements and proposes a statistical approach to predict the probability that a floor installed on a typical 200 to 250 mm thick concrete slab will achieve the noise isolation target set forth in the regulation, or in the co-property act (usually FIIC 55 in Canada and FIIC 50 in USA).

^* The reports documenting these research projects have been distributed in Canada, United States, Europe, Australia and Japan; they are available in French or in English upon request.