Abstract
As an alternative to microphones, optical techniques have been studied for measuring a sound field. They enable contactless and non-invasive acoustical observation by detecting density variation of medium caused by sound. Although they have important advantages comparing to microphones, they also have some disadvantages. Since sound affects light at every points on the optical path, the optical methods observe an acoustical quantity as spatial integration. Therefore, point-wise information of a sound field cannot be obtained directly. Ordinarily, the computed tomography (CT) method has been applied for reconstructing a sound field from optically measured data. However, the observation process of the optical methods have not been considered explicitly, which limits the accuracy of the reconstruction. In this paper, a physical-model-based sound field reconstruction method is proposed. It explicitly formulates the physical observation process so that a model mismatch of the conventional methods is eliminated.
| Original language | English |
|---|---|
| Pages (from-to) | 171-184 |
| Number of pages | 14 |
| Journal | Journal of Sound and Vibration |
| Volume | 394 |
| DOIs | |
| Publication status | Published - 2017 Apr 28 |
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Keywords
- Computed tomography (CT)
- Herglotz wave function
- Laser Doppler vibrometer (LDV)
- Optical sound measurement
- Spherical harmonics
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Acoustics and Ultrasonics
- Mechanical Engineering
Cite this
Acousto-optic back-projection : Physical-model-based sound field reconstruction from optical projections. / Yatabe, Kohei; Ishikawa, Kenji; Oikawa, Yasuhiro.
In: Journal of Sound and Vibration, Vol. 394, 28.04.2017, p. 171-184.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Acousto-optic back-projection
T2 - Physical-model-based sound field reconstruction from optical projections
AU - Yatabe, Kohei
AU - Ishikawa, Kenji
AU - Oikawa, Yasuhiro
PY - 2017/4/28
Y1 - 2017/4/28
N2 - As an alternative to microphones, optical techniques have been studied for measuring a sound field. They enable contactless and non-invasive acoustical observation by detecting density variation of medium caused by sound. Although they have important advantages comparing to microphones, they also have some disadvantages. Since sound affects light at every points on the optical path, the optical methods observe an acoustical quantity as spatial integration. Therefore, point-wise information of a sound field cannot be obtained directly. Ordinarily, the computed tomography (CT) method has been applied for reconstructing a sound field from optically measured data. However, the observation process of the optical methods have not been considered explicitly, which limits the accuracy of the reconstruction. In this paper, a physical-model-based sound field reconstruction method is proposed. It explicitly formulates the physical observation process so that a model mismatch of the conventional methods is eliminated.
AB - As an alternative to microphones, optical techniques have been studied for measuring a sound field. They enable contactless and non-invasive acoustical observation by detecting density variation of medium caused by sound. Although they have important advantages comparing to microphones, they also have some disadvantages. Since sound affects light at every points on the optical path, the optical methods observe an acoustical quantity as spatial integration. Therefore, point-wise information of a sound field cannot be obtained directly. Ordinarily, the computed tomography (CT) method has been applied for reconstructing a sound field from optically measured data. However, the observation process of the optical methods have not been considered explicitly, which limits the accuracy of the reconstruction. In this paper, a physical-model-based sound field reconstruction method is proposed. It explicitly formulates the physical observation process so that a model mismatch of the conventional methods is eliminated.
KW - Computed tomography (CT)
KW - Herglotz wave function
KW - Laser Doppler vibrometer (LDV)
KW - Optical sound measurement
KW - Spherical harmonics
UR - http://www.scopus.com/inward/record.url?scp=85011556583&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85011556583&partnerID=8YFLogxK
U2 - 10.1016/j.jsv.2017.01.043
DO - 10.1016/j.jsv.2017.01.043
M3 - Article
AN - SCOPUS:85011556583
VL - 394
SP - 171
EP - 184
JO - Journal of Sound and Vibration
JF - Journal of Sound and Vibration
SN - 0022-460X
ER -