Different test signals and test methodologies are used to evaluate automotive sound systems. On the objective side are technical measurements that produce graphical plots of data. In contrast are subjective listening tests that use music as a test signal and yield a psychoacoustic perception from the test subjects. This paper investigates many of these test methodologies and then uses some new test signals for both objective measurement and subjective evaluation of vehicle sound system performance.
https://www.aes.org/e-lib/browse.cfm?elib=9910
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