Effects on perception of auditory illusions

录音和回放系统的发展是出于创造完美听觉错觉的目标。在过去的几十年中，音频系统，如立体声，波场合成和双耳耳机播放获得的重要性。努力提高这些系统的质量。尽管经过多年的研究和开发，仍然有许多感知效果和心理声学因素仍然未知或未完全理解。本计画系针对双耳播放之知觉效果进行系统分析。听力测试计划衡量质量的特点。在此基础上，本文提出了一种双耳合成场景感知的测量模型。双耳可听化的可解释性显著地取决于上下文因素。为了衡量这种影响，需要确定和评估一组质量特征。这些质量特征及其权重可以概括为感知的可扩展性。在项目期间，创建了几个不同的听觉场景进行评估。影响特征质量的因素是多种多样的。不同的房间播放和记录被认为是以及变化的复杂性的声学场景，个性化的程度和类型的视觉呈现。由于自由度很高，因此需要进行预测试和专家访谈，以确定最具影响力的因素。在进一步的听力测试中，测量了这些因素的感知效果。这些影响之间的相似性是预期的，并将进行评估。在下一步骤中，效果根据其重要性进行加权，以创建合理的听觉错觉。为了对每个质量特征进行大量的听力测试，需要开发特定的测试方法。

The development of recording and playback systems is motivated by the goal to create a perfect auditory illusion. In the last decades audio systems like ambisonics, wave field synthesis and binaural headphone playback gained in importance. Efforts are made to increase the quality of such systems. Despite the years of research and development, there are still many perceptual effects and psychoacoustical factors which are still unknown or not fully understood. This project deals with the systematical analysis of perceptual effects regarding binaural playback. Listening tests are planned to measure features of quality. Based on these findings a measurement model on the perception of binaural synthesized scenes is developed. The plausibility of a binaural auralisation significantly depends on contextual factors. To measure this influence, a set of quality features need to be determined and evaluated. These quality features and their weightings can be summarized as plausibility of perception. During the project several different auditive scenes are created for evaluation. The factors which influence the quality of features are varied. Different rooms for playback and recording are considered as well as variations of the complexity of the acoustical scene, the degree of personalization and the type of visual presentation. Because of the many degrees of freedom, pretests and interviews with experts are conducted to determine the most influential factors. In further listening test the perceptual effects of these factors are measured. Dependencies between these effects are expected and are going to be evaluated. In the next step, the effects are weighted corresponding to their importance for creating a plausible auditive illusion. To carry out the large amount of listening tests for each quality feature, a specific test methodology needs to be developed.