Real-time visualization technique of three-dimensional sound field by digital holography

2015 Fiscal Year Final Research Report

• Project/Area Number: 26540086
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Perceptual information processing
• Research Institution: Kobe University
• Principal Investigator: MATOBA OSAMU 神戸大学, システム情報学研究科, 教授 (20282593)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: ディジタルホログラフィー / 音場可視化 / 光マイクロフォン

Outline of Final Research Achievements

We proposed a technique to record and reconstruct the sound wave by digital holography. We showed experimentally the recovery of the sound wave and visualization of the propagation of the sound wave. First, the sound wave from the tuning fork operated at 440 Hz was recorded and then it was recovered from the temporal phase distribution at one position. We succeeded the human voice recording and its reconstruction. Next, we succeeded to enlarge the observation area by two methods those are the image-size reduction system and multi-beam illumination for the visualization of sound wave propagation.

Free Research Field

計測光学