CSDA provided acoustical consulting services for the installation of the Philips Azurion 7 C20 Flex Arm Radiology equipment in the Operating Room of Marin General Hospital. The project consisted of the installation of radiology equipment on the Operating Room floor as well as equipment suspended from the ceiling of the second floor. CSDA measured and analyzed existing floor vibration levels at the Hospital and compared the measured levels to the manufacturer’s vibration velocity criteria to verify that ambient vibration from staff and patient footfall noise would not create imaging problems.


CSDA provided acoustical consulting services to Taylor Design for a new MRI facility in the Hospital. CSDA reviewed and analyzed the Air Handler/Water Chiller equipment installation locations and equipment sound data and calculated the expected noise levels from the rooftop equipment into the spaces below. Noise reduction recommendations including sketches and details were provided. Vibration isolation recommendations were made to reduce structure-borne noise transfer into the building.

CSDA also reviewed the MRI noise data and calculated MRI noise to the adjacent spaces as well as performing measurements and analysis of floor vibration with respect to the MRI manufacturers vibration criterion.


CSDA provided on-call acoustical consulting services for the Regional Connector project in Los Angeles. The Regional Connector consists of a 1.9-mile underground rail line with 3 new stations providing direct connection between Azusa and Long Beach, and between East Los Angeles and Santa Monica. The Regional Connector is expected to open in 2022. We are providing review of quarterly noise and vibration control plans as well as other on-call services.


CSDA worked with Kleinfelder and Metro as the acoustical engineer for the construction of all three phases of the Purple Line extension. CSDA is assisting with the construction noise and vibration analysis, reviewing the Contractor’s submittals and mitigation measures, conducting noise and vibration measurements, and preparing monthly noise compliance reports. Our scope includes:

• Review of contractor RFI’s and submittals with respect to construction noise and vibration
• Review of contractor’s noise and vibration monitoring plans and reports
• Preparation of monthly noise monitoring reports for submission to the City of Los Angeles and Beverly Hills monitoring conducted by Metro/TRC
• Site-specific construction noise and vibration analysis (e.g., Saban Theatre)
• Ambient noise monitoring at sensitive receivers
• Data analysis
• Design of construction mitigation measures

Continuing from the current terminus of the Metro Purple Line at Wilshire/Western, the Purple Line Extension will be completely underground and extend westward for about nine miles along Wilshire Boulevard with seven new stations. It will provide a highcapacity, high-speed, dependable alternative for those traveling to and from LA’s “second downtown,” including destinations such as Miracle Mile, Beverly Hills, Century City, and Westwood.


CSDA was retained to perform acoustical consulting services for Phase I of the 500 Kirkham Street project in Oakland. The project consisted of the new construction of three buildings containing 1,032 units with flex spaces and retail spaces at the ground floor. Our Phase I services address Building One and Two with a total of 610 units.

Our acoustical consulting services includes an environmental noise study, schematic design input, design development acoustical review, and construction documents input. In addition, Construction Administration support will be provided.