Direct field acoustic testing system and method
US9109972B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 27, 2011 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Sep 14, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A direct field acoustic testing system includes at least one control microphone, a controller operatively coupled to the control microphone such that the controller receives at least one input signal from the control microphone, and at least four acoustic transducers operatively coupled to the controller such that each transducer is separately controllable by the controller such that a separate output signal is received by each transducer from the controller. A setup is applied to each of the acoustical transducers. The acoustic output of each of the acoustical transducers is monitored using the at least one control microphone. The output signal of each control microphone with respect to each acoustical transducer is compared to a reference spectrum to create a matrix of error functions, and a corrected drive signal computed for each acoustical transducer is applied to the respective acoustical transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.