Soundproof San Diego is an acoustical consulting and construction firm in Grantville, San Diego, providing soundproofing installations, acoustic panel treatments, and sound testing from Suite 109-110 at 5980 Fairmount Avenue in the 92120 ZIP. Founder Neil built the company on 19 years of sound-reduction experience, starting from a background in music rehearsal studio engineering and expanding into residential, commercial, and institutional projects. The firm holds CSLB license #1028422 as a general contractor, which allows it to perform construction-scale soundproofing work — wall and ceiling assembly builds, door seal installations, and floating-floor systems — that smaller consulting-only firms cannot execute. Architectural firms designing spaces with critical acoustic requirements consult with this company during the planning phase, and Domeier Architects Inc in Grantville is one of the local design offices whose project specs feed into the soundproofing construction scope. Sound Transmission Class and Outdoor-Indoor Transmission Class ratings guide the material selection for wall assemblies, with the crew specifying resilient channel, mass-loaded vinyl, Green Glue compound, and multi-layer drywall stacks to meet target STC values. Impact Insulation Class testing addresses the overhead footstep and equipment noise that drives complaints in multi-story condominiums, apartments, and mixed-use buildings throughout San Diego. Recording studio builds include vocal booth isolation, custom patch bays, equipment recommendations, and room acoustics tuning for optimal monitoring clarity. The Fairmount Avenue address positions the firm in the Grantville commercial corridor between Interstate 8 and Mission Gorge Road, and the service area extends across all of Southern California. Insulation and attic work that intersects with soundproofing projects in residential settings runs through construction firms in the area, and Attic Construction in College Area handles the blown-in insulation and radiant barrier installations that complement the acoustic assemblies this company builds into walls and ceilings. Completed projects include schools, hospitals, and sensory processing facilities where acoustically treated spaces reduce auditory overload for occupants with noise sensitivity.