At LANDMARK SOUND LABS, we not only measure everyday acoustic phenomena for our Clients, we also design and manufacture custom test systems to meet the specific requirements of their measurement applications. These systems often include a testing enclosure specifically designed to meet space restrictions or device dimensions. Special care is taken in the design to isolate the test chamber from any unwanted external noises, while minimizing the internal acoustic effects of often suboptimal size.

One particularly challenging test application was measuring bearing noise from pneumatic dental tools ... on the manufucturing floor of a ballbearing plant. While standard isolation techniques demand an airtight seal, these devices leak air, thus pressurizing any sealed enclosure and seriously affecting the output of standard test microphones. To accomodate these constraints we customed an exhaust system to an optimally dimensioned enclosure, allowing air to flow out while greatly reducing sound transmission back in at the frequencies of interest. Combined with a computerized frequency-selective test system, accurate and repeatable measurements were available at several worldwide sites.