Acoustic Test Enclosure at Fisher Dynamics

IAC Acoustics Provides Double Wall Moduline Chamber to Automotive Seats Manufacturer

Fisher Dynamics, an automotive seat manufacturer, needed to perform acoustic measurements with a low noise electrodynamic shaker by MB Dynamics. The measurement space performance requirements were very strict to capture small buzz, squeak, and rattle (BSR) noises from tested products under specific vibration excitation profiles. The space is directly adjacent to a manufacturing line with a high noise level, so a significant reduction of sound was required to fulfill the demanding acoustic test facility specification.

Solution

IAC Acoustics provided an acoustic solution with an industry leading sound transmission loss enclosure to prevent outside noise from contaminating the acoustic measurements inside. Utilizing a Moduline Gemini STC-70 panel construction, the original requirement of 25 dBA was exceeded, with a final measured noise level of 22 dBA inside the test facility. Utilizing a double wall acoustic enclosure with an airspace, a noise level reduction of more than 60 dBA was achieved. A custom color was provided, along with windows in each of the double outswing STC-51 (NIC 70) Noise-Lock^® doors. As part of the IAC Acoustics complete solution, installation and ventilation silencers were also included in the project. Specially designed tandem hardware was applied to the Noise-Lock doors to allow the user to open and close the two double doors with one motion, improving safety and efficiency.