Washington Adventist Hospital

Project Type: Healthcare

Washington Adventist Hospital
Silver Spring, MD

We are on the design team for this new 440,000 SF hospital located in Silver Spring, Maryland. There will be an underground level plus seven floors of patient care. Our scope involves design consultation for sound isolation, mechanical noise control, site exterior noise studies, and noise ordinance reviews. This project is designed with the goal of achieving certification under the LEED for Healthcare 2009 rating system as well as the criteria listed in the 2014 FGI Guidelines.

Sound isolation is of particular importance in this project. Speech privacy and proper sound mitigation between various rooms in a hospital environment is vital to overall patient comfort and for maintaining the appropriate level of privacy during conversations between doctors, staff, and patients. We are reviewing all architectural documents and providing recommendations for wall/ceiling assemblies to achieve the sound isolation criteria in the FGI and Sound and Vibration Design Guidelines for Health Care Facilities (SV Guidelines). In the open areas and areas where there are partial- height partitions, we are reviewing plans, finishes, and materials and providing specific guidelines that include product information and informal drawings where necessary to illustrate our intent.

The mechanical systems need to be evaluated and designed in accordance with the FGI and SV Guidelines as well. We are reviewing MEP drawings that indicate equipment and duct configurations, duct sizes, and installation details, as well as equipment sound data provided by the mechanical engineers and calculating sound levels in representative spaces. We compare the predicted sound levels to the approved Guidelines and provide our analysis, recommendations, and product recommendations.

In order to earn an additional point in the LEED certification, exterior site noise needs to be under a specific level. We performed testing on site to determine an average day-night average sound level (DNL). Using two integrating sound analyzers at pre-determined locations on the future site of the hospital, we recorded typical measurements over the course of several days. The results were encouraging. There were no levels that exceeded the minimal allowable range according to the Guidelines.

This is an ongoing project and we will continue working with the design team throughout all phases of the design process. If required for this project, we will conduct testing on site to verify the effectiveness of our design recommendations in reducing sound transmission throughout the interior spaces.