仅用单声道测量即可生成逼真空间声学响应，减少对专业设备依赖。
Perceptual Evaluation of Extrapolated Spatial Room Impulse Responses From a Mono Source
- 从单声道源数据外推生成空间混响响应，降低采集复杂度。
- 听觉测试中识别虚假信号准确率38%，仅略高于随机猜测水平。
- 适合需要快速构建虚拟音频空间的研究者与开发者使用。
虚拟与增强现实中的沉浸感依赖于逼真的空间音频。然而，真实还原空间声学特性通常需使用专业空间麦克风采集大量声源-麦克风组合的脉冲响应（RIR），过程耗时且成本高。本研究通过三择一强制选择（3AFC）听觉测试，评估了外推并空间化的RIR的逼真度。测试刺激包含三个空间场景的RIR与语音、管弦乐及器乐信号混响后的音频。在20名参与者中，当要求从一个外推生成和两个真实RIR中选出人工信号时，整体准确率为38%，比随机猜测的预期值高出5个百分点。结果表明，仅凭单声道测量即可外推生成具有可接受真实感的空间RIR，显著减少对时间和专业设备的依赖。
原文摘要 · Abstract (English)
Immersion in virtual and augmented reality solutions is reliant on plausible spatial audio. However, plausibly representing a space for immersive audio often requires many individual acoustic measurements of source-microphone pairs with specialist spatial microphones, making the procedure time-consuming and expensive. In this study, we evaluate the plausibility of extrapolated and spatialised Room Impulse Responses (RIRs) by using a 3-Alternative Forced Choice (3AFC) listening test. The stimuli comprised of RIRs from three spaces convolved with speech, orchestral, and instrumental music. When asked to select which stimuli was artificial out of one extrapolated and two real stimuli, an overall accuracy of 38% was achieved from 20 participants (5 percentage points above the expected guessing rate). Given the listening test result, this study shows that it is possible to extrapolate plausible spatial RIRs from mono measurements, decreasing the need for time and specialist equipment in acoustic measurements.
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