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Fundamental psychoacoustical investigations on the perception of projected sound sources

关于投射声源感知的基础心理声学研究

基本信息

批准号：
319923185
负责人：
Professor Dr.-Ing. Ercan Altinsoy
金额：
--
依托单位：
Professur für Akustik und Haptik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2021-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/319923185?language=en
关键词：
Fundamental psychoacoustical investigations perception projected

项目摘要

Modern car, multimedia, and smart-home applications require the reproduction of sound from various directions (e.g., for warning or information signals). Due to the high technical effort or the spatial conditions, a sound reinforcement with distributed loudspeakers might not be possible in many of such situations. One solution is the projection of sound sources on reflective boundaries, e.g., room boundaries. Therefore, highly focused sound sources are necessary. In this case the perceived direction of the auditory event changes from the direction of the real source to the direction of the projected source. A flexible way for creating focusedsound beams is the use of miniature loudspeaker arrays. They can be fully and inconspicuously integrated into existing structures, e.g., enclosures of electrical devices, pieces of furniture, or walls. However, due to their length and the inter speaker distance, loudspeaker arrays have a highly frequency dependent directivity. The exact structure of this directivity determines the perception of projected sound sources. If the sound beam is not focused sufficiently, a significant part of the sound will be radiated directly from the array to the user. Due to the precedence effect, this sound will suppress the perception of the later arriving sound from the projected source. An auditory event at the direction of the array occurs. If the sound beam is highly focused, only marginal directly radiated sound remains. Due to backwardmasking, the perception of this sound can be suppressed by the later arriving sound from the projected source. An auditory event at the direction of the projected source occurs. Pilot studies have shown that therefore the focusing performance of the array has not to be constant within the audio frequency range. The objective of this research project is an insight into theperception of projected sound sources by means of basic research on backward masking. An integral conception of playback systems, which regards the perception of the user in addition to technical aspects, provides new levels of freedom in design. This leads to more flexible and robust systems with a better perceived playback quality. Furthermore, a specific stimulation of the tactile modality can relieve the overloaded auditory modality in a scenario with projected sound sources. This extends the flexibility in the projection of sound sources for low frequencies. Initially, the involved phenomena of the auditory and audio-tactile perception will be investigated in studies with healthy volunteers. Subsequently, a prototype will be developed using the new perception based approach. It will be investigated in a final study, how the perception based development approach improves the perceived quality of the projection of sound sources in a real life environment.

现代汽车、多媒体和智能家居应用需要从各个方向（例如，用于警告或信息信号）。由于高技术努力或空间条件，在许多这样的情况下，使用分布式扬声器的声音增强可能是不可能的。一种解决方案是声源在反射边界上的投影，例如，房间边界。因此，高度集中的声源是必要的。在这种情况下，听觉事件的感知方向从真实的源的方向改变为投影源的方向。一个灵活的方法来创建聚焦声束是使用微型扬声器阵列。它们可以完全和不显眼地融入现有结构，例如，电气设备、家具或墙壁的外壳。然而，由于它们的长度和扬声器间距离，扬声器阵列具有高度频率依赖的方向性。这种指向性的确切结构决定了投射声源的感知。如果声束没有充分聚焦，则声音的很大一部分将直接从阵列辐射到用户。由于优先效应，该声音将抑制对来自投影源的较晚到达的声音的感知。在阵列的方向上发生听觉事件。如果声束高度聚焦，则仅残留少量的直接辐射声。由于向后掩蔽，这种声音的感知可以被来自投影源的稍后到达的声音抑制。在投射源的方向上发生听觉事件。试点研究已经表明，因此，阵列的聚焦性能在音频频率范围内不一定是恒定的。本研究项目的目的是通过对后向掩蔽的基础研究来深入了解投射声源的感知。播放系统的整体概念，除了技术方面之外，还考虑到用户的感知，提供了新的设计自由度。这导致具有更好的感知回放质量的更灵活和鲁棒的系统。此外，触觉模态的特定刺激可以在具有投影声源的场景中缓解过载的听觉模态。这扩展了低频声源投影的灵活性。最初，将在健康志愿者的研究中研究听觉和听觉-触觉感知的相关现象。随后，将使用新的基于感知的方法开发原型。在最后的研究中，将研究基于感知的开发方法如何提高真实的生活环境中声源投影的感知质量。