An improved method for recovering the acoustic characteristics of a target sound source sitting on plane by boundary element method

Lin, Wei; Li, Sheng; Song, Liang; Gao, Honglin; Gao, Jiantong; Liu, Yansen

doi:10.1016/j.apacoust.2020.107316

Cited by 7 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many algorithms have been proposed to improve the accuracy of the sound field reconstruction in NAH, which can be roughly divided into the following categories: the spatial Fourier transform (SFT) method [8][9][10][11], the boundary element method (BEM) [12][13][14][15], the equivalent source method (ESM) [16][17][18][19][20] and the statistically optimal near-field acoustic holography (SONAH). SONAH, a typical patch NAH algorithm proposed by Olsen and Hald [21], uses the linear superposition of the sound pressure or particle velocity on the holographic surface to reconstruct the sound field on the source surface.…”

Section: Introductionmentioning

confidence: 99%

A combined sound field reconstruction method for large cylindrical surfaces using non-conformal plane measurement

Cheng¹,

Han²,

Song³

et al. 2021

Meas. Sci. Technol.

View full text Add to dashboard Cite

In practical acoustic measurement for large cylindrical surfaces, it is difficult to keep conformal and coaxial between the holographic surface and the reconstruction surface. To overcome this problem, a combined sound field reconstruction method using non-conformal plane measurement is proposed in this paper. Based on the sound pressure measured on the holographic plane, the combined method first reconstructs the sound field on the cylindrical conformal surface using statistically optimal planar near-field acoustic holography, and then reconstructs the sound field on the cylindrical reconstruction surface using statistically optimal cylindrical near-field acoustic holography. And a least square optimization method is proposed to determine the optimal position of the conformal surface. In addition, to overcome ill-posed problems, an error reduction method combining truncated singular value decomposition and Tikhonov regularization is proposed. Finally, the proposed method is applied to a test bed, and the accuracy and robustness of the sound field reconstruction for large cylindrical surfaces are obviously improved, which can provide reliable evidences for noise monitoring and control of mechanical systems.

show abstract

Section: Introductionmentioning

confidence: 99%

A combined sound field reconstruction method for large cylindrical surfaces using non-conformal plane measurement

Cheng¹,

Han²,

Song³

et al. 2021

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The equivalent source method (ESM)-based FFR technique combined with the NAH was used to reconstruct the sound field radiated by a target source from the measured mixed field [ 17 , 18 , 19 , 20 ]. An improved double-layer BEM was proposed to recover the half-space acoustic characteristics of a target source sitting on the boundaries in a bounded noisy environment by combining it with the image-source method [ 21 ]. Wu et al [ 22 ] presented a BEM-based NAH in conjunction with the FFR technique to reconstruct the free sound field in a non-anechoic environment.…”

Section: Introductionmentioning

confidence: 99%

Recovering the Free-Field Acoustic Characteristics of a Vibrating Structure from Bounded Noisy Underwater Environments

Lin

2021

Sensors

Self Cite

View full text Add to dashboard Cite

The vibrational behavior of an underwater structure in the free field is different from that in bounded noisy environments because the fluid–structure interaction is strong in the water and the vibration of the structure caused by disturbing fields (the reflections by boundaries and the fields radiated by sources of disturbances) cannot be ignored. The conventional free field recovery (FFR) technique can only be used to eliminate disturbing fields without considering the difference in the vibrational behavior of the structure in the free field and the complex environment. To recover the free-field acoustic characteristics of a structure from bounded noisy underwater environments, a method combining the boundary element method (BEM) with the vibro-acoustic coupling method is presented. First, the pressures on the measurement surface are obtained. Second, the outgoing sound field and the rigid body scattered sound field are calculated by BEM. Then, the vibro-acoustic coupling method is employed to calculate the elastically radiated scattered sound field. Finally, the sound field radiated by the structure in the free field is recovered by subtracting the rigid body scattered sound field and the elastically radiated scattered sound field from the outgoing sound field. The effectiveness of the proposed method is validated by simulation results.

show abstract

Finite-difference time-domain modeling for underwater acoustic scattering applications based on immersed boundary method

2022

View full text Add to dashboard Cite

An improved method for recovering the acoustic characteristics of a target sound source sitting on plane by boundary element method

Cited by 7 publications

References 18 publications

A combined sound field reconstruction method for large cylindrical surfaces using non-conformal plane measurement

A combined sound field reconstruction method for large cylindrical surfaces using non-conformal plane measurement

Recovering the Free-Field Acoustic Characteristics of a Vibrating Structure from Bounded Noisy Underwater Environments

Finite-difference time-domain modeling for underwater acoustic scattering applications based on immersed boundary method

Contact Info

Product

Resources

About