CHARLES M. SALTER ASSOCIATES, INC. (Salter) is a consulting firm located in San Francisco with a branch office in San Jose, California. We provide services in acoustics, audiovisual, telecommunications, and security. The firm was founded in 1975 and consults on over 900 projects per year worldwide. Our team of more than 55 comprises Professional Engineers, LEED® Accredited Professionals, Certified Technology Specialists, Registered Communications Distribution Designers, Fellows of the Audio Engineering Society, Fellows of the Acoustical Society of America, and a PhD, as well as individuals with interdisciplinary and advanced degrees in architecture, music, linguistics, business, and forensics. We draw from this diverse expertise to develop solutions tailored to each project.

Salter completed a LEED®-Gold certified office expansion in the historic Hallidie Building. The new space is a flexible showplace and teaching environment demonstrating new acoustical, audiovisual, and telecommunications technologies within a sustainable office design. We also have videoconferencing to enhance communications with our clients.

In order to better inform clients, Salter has an in-house presentation studio to simulate acoustical environments. Salter also has a subsidiary company, the Audio Forensic Center.

In 1998, Salter authored ACOUSTICS: Architecture, Engineering, the Environment, a book for architects, engineers, facility owners and managers, specifiers, contractors, and other professionals with a need for information on acoustics.