Sound radiation from a double-leaf elastic plate with a point force excitation: effect of an interior panel on the structure-borne sound radiation

Yairi, Motoki; Sakagami, Kimihiro; Sakagami, E.; Morimoto, Masayuki; Minemura, Atsuo; Andow, Kei

doi:10.1016/s0003-682x(01)00075-5

Cited by 28 publications

(13 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Takahashi 11 studied the problem of sound radiation from periodically connected infinite double-panel structures excited by a harmonic point force and calculated the sound radiated power of two different structures ͑i.e., point connected and point connected with rib stiffening͒. Yairi et al 10 studied theoretically sound radiation from a double-leaf partition subjected to point force excitation and found that it is difficult to reduce the radiated sound power by an interior panel alone, even if its mass is increased. Kropp and Rebillard 25 investigated the possibilities to optimize the sound insulation property of double wall constructions at low frequencies.…”

Section: Introductionmentioning

confidence: 99%

Vibroacoustic behavior of clamp mounted double-panel partition with enclosure air cavity

Xin

Lu²,

Chen³

2008

The Journal of the Acoustical Society of America

104

View full text Add to dashboard Cite

A theoretical study on the vibroacoustic performance of a rectangular double-panel partition clamp mounted in an infinite acoustic rigid baffle is presented. With the clamped boundary condition taken into account by the method of modal function, a double Fourier series solution to the dynamic response of the structure is obtained by employing the weighted residual method (i.e., the Galerkin method). The double series solution can be considered as the exact solution of the problem, as the structural and acoustic-structural coupling effects are fully accounted for and the solution converges numerically. The accuracy of the theoretical predictions is checked against existing experimental data, with good agreement achieved. The influence of several key parameters on the sound isolation capability of the double-panel configuration is then systematically studied, including panel dimensions, thickness of air cavity, elevation angle, and azimuth angle of incidence sound. The present method is suitable for double-panel systems of finite or infinite extent and is applicable for both low- and high-frequency ranges. With these merits, the proposed method compares favorably with a number of other approaches, e.g., finite element method, boundary element method, and statistical energy analysis method.

show abstract

Section: Introductionmentioning

confidence: 99%

Vibroacoustic behavior of clamp mounted double-panel partition with enclosure air cavity

Xin

Lu²,

Chen³

2008

The Journal of the Acoustical Society of America

104

View full text Add to dashboard Cite

show abstract

“…The radiated sound power from Plate 1 is derived by simultaneously solving the governing equations of the sound field and those for the motion of the plates. This problem was solved previously under the assumption that the acoustic admittance of the plates is zero, i.e., no absorption [27]. Exactly as in Sect.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…where ðrÞ is the Dirac delta function. Assuming the problem to be axisymmetric and using of the Hankel transform in cylindrical coordinates, the angular spectrum W 1 ðkÞ with respect to w 1 ðr 0 Þ can be obtained in the same manner as in the previous study [27] and is expressed as…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Relationship between sound radiations resulting from airborne-sound and point-force excitations of a double-leaf infinite elastic plate

Yairi

Sakagami

Okuzono

2019

Acoust. Sci. & Tech.

Self Cite

View full text Add to dashboard Cite

This paper presents an expanded theory for relating airborne-sound-excited and forceexcited sound radiations from solid structures. Although the reduction of these two types of sound radiation is a fundamental issue in noise-control engineering, each of them has been historically treated as a separate issue. The reduction in the former is normally called airborne sound insulation and separated from the latter, especially in architectural acoustics. A previous study (M. Yairi et al., J. Acoust. Soc. Am., 140, 453-460 (2016)) established a fundamental relationship between the sound radiations from random-incidence sound-excited and point-force-excited vibrations of a single-leaf infinite elastic plate. A conversion function that relates the two excitation cases was presented in a simple closed form, not including the parameters of the plates, which included of only the specific impedance and the acoustic wavenumber of the medium surrounding the plate. In this paper, the applicability of the conversion function is expanded from a single-leaf infinite elastic plate model to a double-leaf infinite elastic plate model. The sound radiation from a double-leaf infinite elastic plate driven by random-incidence sound and that driven by point-force excitation are theoretically investigated. The conversion function derived from the present model successfully relates the two excitation problems at all analyzed frequencies and has been shown to agree with the previously established single-leaf theory.

show abstract

“…For the case studied, the STL values decrease with increasing elevation angle for frequencies below about 43 Hz, while for frequencies above this value, the overall trend is similar apart from the complicated system modal behavior. In addition, it is worthwhile to note that the panel-cavity-panel resonance frequency increases with the elevation angle, which can be approximately described by a simple formula [25]: ı . For frequencies below about 210 Hz, the STL curves for the four cases studied fall into one master curve.…”

Section: Effects Of Incident Angles On Stlmentioning

confidence: 99%

Transmission of Sound Through Finite Multiple-Panel Partition

Xin

2014

Springer Tracts in Mechanical Engineering

View full text Add to dashboard Cite

This chapter is organized as three parts: in the first part, the vibroacoustic performance of a rectangular double-panel partition with enclosed air cavity and simply mounted on an infinite acoustic rigid baffle is investigated analytically. The sound velocity potential method rather than the commonly used cavity modal function method is employed, which possesses good expandability and has significant implications for further vibroacoustic investigations. The simply supported boundary condition is accounted for by using the method of modal function, and double Fourier series solutions are obtained to characterize the vibroacoustic behaviors of the structure. Results for sound transmission loss (STL), panel vibration level, and sound pressure level are presented to explore the physical mechanisms of sound energy penetration across the finite double-panel partition. Specifically, focus is placed upon the influence of several key system parameters on sound transmission, including the thickness of air cavity, structural dimensions, and the elevation angle and azimuth angle of the incidence sound. Further extensions of the sound velocity potential method to typical framed double-panel structures are also proposed.In the second part, the air-borne sound insulation performance of a rectangular double-panel partition clamp mounted on an infinite acoustic rigid baffle is investigated both analytically and experimentally, and compared with that of a simply supported one. With the clamped (or simply supported) boundary accounted for by using the method of modal function, a double series solution for the sound transmission loss (STL) of the structure is obtained by employing the weighted residual (Galerkin) method. Experimental measurements with Al double-panel partitions having air cavity are subsequently carried out to validate the theoretical model for both types of the boundary condition, and good overall agreement is achieved. A consistency check of the two different models (based separately on clamped modal function and simply supported modal function) is performed by

show abstract

Sound radiation from a double-leaf elastic plate with a point force excitation: effect of an interior panel on the structure-borne sound radiation

Cited by 28 publications

References 8 publications

Vibroacoustic behavior of clamp mounted double-panel partition with enclosure air cavity

Vibroacoustic behavior of clamp mounted double-panel partition with enclosure air cavity

Relationship between sound radiations resulting from airborne-sound and point-force excitations of a double-leaf infinite elastic plate

Transmission of Sound Through Finite Multiple-Panel Partition

Contact Info

Product

Resources

About