Comparative results between loudspeaker measurements using a tetrahedral enclosure and other methods
Date: 11 Mar 2014
Lecture by Geoff Hill, Hill Acoustics Limited.
Note: This lecture will be at Imperial College, but in a different place from usual. See the Huxley Building on this map.
A major problem for the loudspeaker and transducer industries throughout the world has been an inability to rely upon measurements routinely exchanged between suppliers and customers. New systems are now in use, giving a unique and stable test environment with the opportunity to standardize and compare results between measurement sites.
Tetrahedral measurement enclosures work because the shape eliminates standing waves, and acoustic foam damps any remaining high frequencies. It then rigidly defines the measurement geometry together with interchangeable sub baffles, ensuring rapid and accurate change-over and repeatable measurements. The design, production and customer chain results are thus comparable unit-to-unit throughout the world to an unprecedented degree.
This lecture updates a paper published in 2013 with further comparative measurements, and compares them to results by other people and methods.