Optically visualized sound field reconstruction using Kirchhoff–Helmholtz equation

Yatabe, Kohei; Oikawa, Yasuhiro

doi:10.1250/ast.36.351

Cited by 16 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the expression of the wavefront, the interpolation method proposed by Yatabe [45,46] was introduced. In this method, the pressures and their normal derivative at arbitrary boundary were estimated by solving the inverse problem using measured sound pressures.…”

Section: Evaluation Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Sound field reproduction system using narrow directivity microphones and boundary surface control principle

Kashiwazaki

Omoto

2018

Acoust. Sci. & Tech.

View full text Add to dashboard Cite

Boundary surface control (BoSC) is a useful method of reproducing the sound field physically. However, it is challenging in the case of real-time operation. This is mainly due to the calculation cost of a lot of inverse filter convolutions to obtain reproduction signals. This paper proposes a method for reducing of number of inverse filters and implements it in 24-channel narrow directivity (shotgun) microphone array and 24-channel circularly arranged loudspeaker array. Moreover, it provides an experimental evaluation of the reproduction accuracy according to measurement of reproduced wavefront. The accuracy of the reproduced wavefront by the filters, whose number was reduced to less than 1/5 by proposed method, was comparable with the case of full number of filters. Finally, a system aiming at sound field reproduction in a wide frequency range was constructed by a hybrid method of reproducing with an inverse filter in the low range and directly outputting from the speaker in the direction corresponding to the microphone in the high frequency range. We confirmed that real-time processing is possible for this hybrid method by using a convolution plug-in of digital audio workstation software.

show abstract

Section: Evaluation Proceduresmentioning

confidence: 99%

“…This playback is usually performed with notebook computer, having Intel Core i7, 2.7 GHz processor and 16 GB memory, for example, without serious load on CPU. Then the pressures at arbitrary inner points were calculated by forward calculation [45,46].…”

Section: Implementation In Daw Softwarementioning

confidence: 99%

Sound field reproduction system using narrow directivity microphones and boundary surface control principle

Kashiwazaki

Omoto

2018

Acoust. Sci. & Tech.

View full text Add to dashboard Cite

show abstract

“…Sound field visualization technology is utilized for noise source detection, acoustical design, and other applications. In previous studies, sound field visualization has been realized with various measurement methods, such as acoustical holography [1,2], beam-forming [3,4], and optical methods [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Visualization system for sound field using see-through head-mounted display

Inoue

Ikeda

Yatabe

et al. 2019

Acoust. Sci. & Tech.

Self Cite

View full text Add to dashboard Cite

For the visualization of a sound field, a widely used method is the superimposition of the sound information onto a camera view. Although it effectively enables the understanding the relationship between space and sound, a planar display cannot resolve depth information in a straightforward manner. In contrast, a see-through head-mounted display (STHMD) is capable of representing three-dimensional (3D) vision and natural augmented reality (AR) or mixed reality (MR). In this paper, we propose a system for the measurement and visualization of a sound field with an STHMD. We created two visualization systems using different types of STHMDs and technologies for realizing AR/MR and a measurement system for a 3D sound intensity map, which can be used together with the visualization system. Through three visualization experiments, we empirically found that the stereoscopic viewing and the convenient viewpoint movement associated with the STHMD enables understanding of the sound field in a short time.

show abstract

3D sound source localization based on coherence-adjusted monopole dictionary and modified convex clustering

2018

View full text Add to dashboard Cite

Optically visualized sound field reconstruction using Kirchhoff–Helmholtz equation

Cited by 16 publications

References 8 publications

Sound field reproduction system using narrow directivity microphones and boundary surface control principle

Sound field reproduction system using narrow directivity microphones and boundary surface control principle

Visualization system for sound field using see-through head-mounted display

3D sound source localization based on coherence-adjusted monopole dictionary and modified convex clustering

Contact Info

Product

Resources

About