Effect of Velocity and Time-Step on the Continuity of a Discrete Moving Sound Image

Q2 Physics and Astronomy

Advances in Acoustics and Vibration Pub Date : 2014-06-05 DOI:10.1155/2014/950463

Y. Seki

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Abstract

As a basic study into 3-D audio display systems, this paper reports the conditions of moving sound image velocity and time-step where a discrete moving sound image is perceived as continuous motion. In this study, the discrete moving sound image was presented through headphones and ran along the ear-axis. The experiments tested the continuity of a discrete moving sound image using various conditions of velocity (0.25, 0.5, 0.75, 1, 2, 3, and 4 m/s) and time-step (0, 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, and 0.14 s). As a result, the following were required in order to present the discrete moving sound image as continuous movement. (1) The 3-D audio display system was required to complete the sound image presentation process, including head tracking and HRTF simulation, in a time shorter than 0.02 s, in order to present sound image movement at all velocities. (2) A processing time longer than 0.1 s was not acceptable. (3) If the 3-D audio display system only presented very slow movement (less than about 0.5 m/s), processing times ranging from 0.04 s to 0.06 s were still acceptable.

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速度和时间步长对离散运动声像连续性的影响

作为三维音频显示系统的基础研究，本文报道了离散运动声像被感知为连续运动的运动声像的速度和时间步长的条件。在本研究中，通过耳机呈现沿耳轴运行的离散运动声图像。实验使用不同的速度条件(0.25、0.5、0.75、1、2、3和4 m/s)和时间步长(0、0.02、0.04、0.06、0.08、0.10、0.12和0.14 s)来测试离散运动声图像的连续性。因此，为了将离散运动的声音图像呈现为连续运动，需要以下内容。(1)三维音频显示系统需要在小于0.02 s的时间内完成声音图像呈现过程，包括头部跟踪和HRTF模拟，以呈现各种速度下的声音图像运动。(2)处理时间超过0.1 s是不可接受的。(3)如果三维音频显示系统仅呈现非常缓慢的运动(小于0.5 m/s左右)，处理时间在0.04 s ~ 0.06 s范围内仍然是可以接受的。

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Advances in Acoustics and Vibration ACOUSTICS-

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期刊介绍： The aim of Advances in Acoustics and Vibration is to act as a platform for dissemination of innovative and original research and development work in the area of acoustics and vibration. The target audience of the journal comprises both researchers and practitioners. Articles with innovative works of theoretical and/or experimental nature with research and/or application focus can be considered for publication in the journal. Articles submitted for publication in Advances in Acoustics and Vibration must neither have been published previously nor be under consideration elsewhere. Subject areas include (but are not limited to): Active, semi-active, passive and combined active-passive noise and vibration control Acoustic signal processing Aero-acoustics and aviation noise Architectural acoustics Audio acoustics, mechanisms of human hearing, musical acoustics Community and environmental acoustics and vibration Computational acoustics, numerical techniques Condition monitoring, health diagnostics, vibration testing, non-destructive testing Human response to sound and vibration, Occupational noise exposure and control Industrial, machinery, transportation noise and vibration Low, mid, and high frequency noise and vibration Materials for noise and vibration control Measurement and actuation techniques, sensors, actuators Modal analysis, statistical energy analysis, wavelet analysis, inverse methods Non-linear acoustics and vibration Sound and vibration sources, source localisation, sound propagation Underwater and ship acoustics Vibro-acoustics and shock.