Personal Sound Zones: Study on the Threshold of Acceptability in an Automotive Environment
* Presenting author
Personal sound zones aim to spatially limit the audibility of reproduced audio content. An ideal solution supplies multiple listeners in the same room with different audio signals without the need for headphones or constructional acoustic barriers. These systems however suffer from physical limitations, resulting in crosstalk beyond the borders of a sound zone into another. Especially when reproducing multiple sound zones in small rooms (e.g. within vehicle cabins), significant interferences from adjacent sound zones can diminish the perceptive listening experience. While physical metrics can quantify the magnitude of these interferences, e.g. by measuring the sound pressure level, the actual impairment of the subjective listening experience can usually not be quantified on that basis. The studies presented in this work show the existence of a program-dependent threshold of acceptability of interfering audio signals as well as indications of different factors influencing this threshold.