Sweeping echoes in two-dimensional reverberant space

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概要

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• A very interesting acoustical phenomenon, which we call sweeping echoes in a two-dimensional (2D) space, is described and investigated. Sweeping echoes in a three-dimensional (3D) space have recently been reported. tn this paper, the regularity of reflected sound in a 2D regularly shaped space is first investigated based on number theory. The reflected pulse sound train has almost equal intervals between pulses on the squared-time axis as in a 3D space. This regularity of arrival times of the reflected pulse sounds generates sweeping echoes whose frequency increases linearly with time. Computer simulation of room acoustics shows good agreement with the theoretical results. In a practical situation, sweeping echoes were observed in a long hallway having a square section.

• 社団法人日本音響学会の論文

著者

• Kaneda Y

  Tokyo Denki University

• Kaneda Yutaka

  Tokyo Denki University

• Furuya K

  Ntt Cyber Space Laboratories

• Kiyohara Kenji

  Ntt Cyber Space Laboratories

関連論文

• Sweeping echoes in two-dimensional reverberant space
• Mechanism of the sweep sounds perceived in a regular-shaped reverberation room
• Mechanism of the low-speed sweep sound perceived in a regular-shaped reverberation room
• Sweep sounds perceived in a rectangular parallelepiped reverberation room

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