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AES Automotive Conference - USA

AES 2017 International Conference on Automotive Audio

General Information

Dates: September 8th - 10th 2017
Location: Burlingame, San Francisco, CA, USA

Paper Presentation: Audio System Evaluation with Music Signals (Stefan Irrgang)

Paper Session 6: Sunday, September 10th 2017 (11am - 12pm)

Synthetic test signals, such as multi-tone signals or sweeps, are mostly used for the development and end-of-line testing of components and the complete audio systems in cars. Those signals provide objective, reproducible and interpretable test results in a short time. In contrast, the customer uses the audio system to reproduce music and speech, which are non-stationary signals with complex spectral and temporal properties. This paper discusses measurement methods that can be used for assessing the performance of the audio system by using any synthetic and natural (music) stimuli. A new technique based on adaptive modeling of the linear time variant distortion is used to combine physical and perceptual evaluation of the residual nonlinear distortion. 

Tutorial: In-situ Production Test of Car Audio System (Stefan Irrgang)

Tutorial 3: Sunday, September 10th, 2017 (2 - 3 pm)

Checking the sound quality of a car audio system at the end of the production line (in-situ EOL test) is required to satisfy rising customer expectations and to ensure consistent, high audio quality in delivered cars. While 100% testing of transducers and subcomponents is state of the art, there is no commonly used end-of-line test for complete cars. However, the pre-testing of components is not sufficient. Defects may be caused by improper mounting of speakers or interior panels. The fundamental frequency response, sensitivity, harmonic and intermodulation distortion as well as spatial characteristics are very important in the design phase but are less critical in car manufacturing. Even if those characteristics are varying beyond defined limits, it is rather difficult for the customer to rate the quality as bad. This is quite different for excessive distortion generated by defects (e.g. „rub and buzz“) of the sound reproduction system and parasitic vibration (buzzing) caused by improper mounting of interior car components (loose parts, grill, windows, panels, ... ). Those defects have a high impact on sound quality, are clearly audible by customers and are perceived as unnatural and annoying. In this tutorial, existing methods for sound quality assurance in cars are discussed and new methods are suggested combining highly sensitive defect detection in an industrial environment, root cause analysis for failed tests and assistance for meaningful limit definition.

Visits and meetings

We will be available for company visits in the area. Please contact Jasmin for further information. 

Friday, 2017-09-08 15:28 Age: -49 Days