Portal de Periódicos da CAPES

Auditory illusion through headphones: History, challenges and new solutions

2016; Acoustical Society of America; Linguagem: Inglês

10.1121/2.0000897

1939-800X

Karlheinz Brandenburg, Stephan Werner, Florian Klein, Christoph Sladeczek,

Speech and Audio Processing

The dream of perfect re-creation of sound has always consisted of the reproduction of sounds such that they seem to be exact copies of an original signal and the plausible re-creation of complex sound environments, the possibility to be immersed in sound. The goal seems to be challenging, especially if reproduction via headphones is considered. In spite of an adequate technical realization the creation of a perfect auditory illusion is not predictable in a reliable way. Contemporary investigations show clearly that in addition to the static, source and listener dependent modifications to headphone sound, attention must be paid to cognitive effects: The perceived presence of a room rendering changes depending on the expectations of a listener. Prominent effects are acoustic divergence between the listening room and the synthesized scene, visibility of the room, and prior knowledge triggered by the location where the listener has been before. Cognitive effects are mostly time variant which includes anticipation and assimilation processes caused by training and adaptation. The contribution presents experiments showing some of these contextual effects. Quality features are shifted by adaptation and training. Furthermore, this contribution presents some proposals on how to get to the next level of fidelity in headphone listening.