Blachford Acoustics Laboratory


The Blachford Acoustics Laboratory and Technical Center is a multi-faceted facility that serves as a vital resource for our customers who are interested in meeting noise, sound quality and thermal goals while reducing weight and cost. All studies are performed to the highest standards because the facility is ISO 17025 accredited to perform numerous tests. It offers an unprecedented means of analyzing the acoustical composition and impact of noise structures, and is truly a resource capable of meeting even the most exacting acoustical and thermal needs.

Featuring a large hemi-anechoic chamber, a heavy-duty dynamometer and buck testing capabilities, it is the only laboratory specifically designed for testing both smaller vehicles and products, as well as large equipment such as heavy trucks, off-highway machines, buses or motor homes. Our experienced acoustical engineers work closely with our customers’ technical groups as a team to conduct intensive product and material tests to solve difficult problems.

Whether enhancing the performance of existing noise control treatments or developing new acoustical packages, the result is the same: better differentiation and value for our customers.


A drive-in chamber designed to product an echo-free (anechoic) environment suitable for the testing of large vehicles, such as buses and trucks, as well as medium-sized off-highway machines. The thick walls and ceiling are covered with a wedge treatment which simulates a quiet outdoor test environment. This room also features a chassis dynamometer, numerous bed plate mounting fixtures, and a low-noise ventilation system. Here, we will determine your product’s base-line sound levels, and will then map all sound sources and paths.
Sound power measurements can be made on our outdoor test pad located next to the laboratory. In addition to the 10-meter hemispherical test surface, acceleration and deceleration lanes are available.
Our laboratory shop where test fixtures are fabricated, vehicles are prepared for testing, and materials are stored.
A sound isolation chamber that is used as the receiving room during buck studies and other projects using the 8’x8′ test opening. The chamber, which includes sound absorptive walls and ceiling, can also be used as a quiet room for small product tests. A vehicle or machine component, such as a front-of-dash, is placed inside the chamber, which connects a quiet room with the reverberation chamber. The component is then sealed in the opening so that sound from the reverberation room only enters the quiet room through the component. A sound intensity scan may then be performed to provide a level of detail not previously possible. This type of test provides a highly repeatable method for part development and optimization.
The room where the chassis dynamometer and all tests are controlled and monitored.
Actual and simulated recordings of the sound from your product can be presented in our jury room for evaluation. Through this process, we can understand the parts of the sound that customers may find pleasing or undesirable. We develop models based on sound sources and paths within a product. As a model is developed, treatments are simulated and the optimum package is assembled.
Anechoic chambers, constructed with sound absorptive walls and ceiling, that are used as the reviewing room during material sound transmission loss studies.
A 7000 cubic foot chamber designed to reflect sound and used for material and buck testing. It has super hard, non-porous walls, ceiling and floor, as well as stationary and rotating sound wave diffusers to provide a random incidence environment. Here, we can evaluate different acoustic treatments by testing for Sound Transmission Loss (STL), sound absorption, and sound power. Test windows allow for vertical and horizontal STL measurements. A special feature of the room is an 8×8 foot “buck” or component test window which allows for very detailed analysis of large components such as a cab, floor or firewall. The large buck opening gives truck and off-highway vehicle manufacturers the opportunity to test complete systems without destroying vehicles.
A room for small sample testing. Tests include thermal conductivity (shown), normal incidence sound absorption, air flow resistivity and microscopic examination.