title: High-speed imaging of sound using parallel phase-shifting interferometry.
abstract: Sound-field imaging, the visualization of spatial and temporal distribution of acoustical properties such as sound pressure, is useful for understanding acoustical phenomena. This study investigated the use of parallel phase-shifting interferometry (PPSI) with a high-speed polarization camera for imaging a sound field, particularly high-speed imaging of propagating sound waves. The experimental results showed that the instantaneous sound field, which was generated by ultrasonic transducers driven by a pure tone of 40 kHz, was quantitatively imaged. Hence, PPSI can be used in acoustical applications requiring spatial information of sound pressure.
authors.forename: Kenji
authors.initials: K
authors.lastname: Ishikawa
authors.forename: Kohei
authors.initials: K
authors.lastname: Yatabe
authors.forename: Nachanant
authors.initials: N
authors.lastname: Chitanont
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Ikeda
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Oikawa
authors.forename: Takashi
authors.initials: T
authors.lastname: Onuma
authors.forename: Hayato
authors.initials: H
authors.lastname: Niwa
authors.forename: Minoru
authors.initials: M
authors.lastname: Yoshii