Low frequency sound transmission through close-fitting finite sandwich panels

Tang, Winnie; Zheng, Huifeng; Ng, C.F.

doi:10.1016/s0003-682x(97)00107-2

Cited by 16 publications

(11 citation statements)

References 5 publications

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“…These results are not particularly surprising since the dimensions of each test room are signi®cantly smaller than what is experimentally de®ned as desirable (around 30 m 3 for the receptor and 24 m 3 for the emitting room). Similar behaviour was found by Tang et al [16], in the work he developed to analyse the sound transmission through close-®tting ®nite sandwich panels. In his work, an open rectangular concrete box (368 Â 368 Â 620 mm) was built, and the test panels were ®xed over it.…”

Section: Relevant Resultssupporting

confidence: 82%

Sound transmission through single, double and triple glazing. Experimental evaluation

2001

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Experimental results on sound insulation of glazed openings are reported in this work. The laboratory experiments were performed placing the text specimens between two relatively small rooms. The number of glass panels, their thickness, the air gap thickness between the panels and the type of ®xing frame are the variables considered. The insulation conferred by the glazed opening is characterised, identifying the localisation of the dips of insulation in the frequency domain with those related to its own natural dynamic vibration modes and those related to the natural modes of vibration of the rooms. Since the full mathematical description of the acoustic insulation conferred by glazed panels is extremely complicated, simpli®ed theoretical models are frequently used. In this work, the experimental insulation curves obtained are compared with those predicted by the simpli®ed analytical models. This analysis shows that the predictive models, particularly when applied to multiple glazing windows, exhibit marked dierences when compared with the experimental data. #

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Section: Relevant Resultssupporting

confidence: 82%

Sound transmission through single, double and triple glazing. Experimental evaluation

2001

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“…Several works have been established to solve this problem. This includes employing absorptive materials inside the gap of a double-leaf, for example, fiberglass [2] and rockwool [3] which can effectively increase the STL due to additional damping to the air layer provided by the absorbent. Mao and Pietrzko [4] proposed a technique by installing the Helmholtz resonators at the air gap.…”

Section: Introductionmentioning

confidence: 99%

Normal Incidence of Sound Transmission Loss of a Double-Leaf Partition Inserted with a Microperforated Panel

Putra

Ismail

Ramlan

et al. 2013

Advances in Acoustics and Vibration

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A double-leaf partition in engineering structures has been widely applied for its advantages, that is, in terms of its mechanical strength as well as its lightweight property. In noise control, the double-leaf also serves as an effective noise barrier. Unfortunately at low frequency, the sound transmission loss reduces significantly due to the coupling between the panels and the air between them. This paper studies the effect of a microperforated panel (MPP) inserted inside a double-leaf partition on the sound transmission loss performance of the system. The MPP insertion is proposed to provide a hygienic double-leaf noise insulator replacing the classical abrasive porous materials between the panels. It is found that the transmission loss improves at the troublesome mass-air-mass resonant frequency if the MPP is located closer to the solid panel. The mathematical model is derived for normal incidence of acoustic loading.

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“…Therefore, the damping effect is considered by introducing viscous damping terms in Eqs. (1)(2)(3)(4)(5), and quantified by assuming the modal loss factors as 0.005 for two panels and 0.001 for cavities and the enclosure during analysis.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Control of sound transmission through a double-wall structure with an acoustic enclosure is an interesting topic of research that has received much attention for years [1][2][3][4][5][6]. Generally, for the double-wall structure with a shallow gap, the strong coupling of the mass-air-mass will deteriorate sound behavior at low frequencies, which leads to the rapid development of using active techniques for noise control [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Noise control of an acoustic enclosure covered by a double-wall structure with shallow gap: Design of resonator-like cavities

2010

Applied Acoustics

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Low frequency sound transmission through close-fitting finite sandwich panels

Cited by 16 publications

References 5 publications

Sound transmission through single, double and triple glazing. Experimental evaluation

Sound transmission through single, double and triple glazing. Experimental evaluation

Normal Incidence of Sound Transmission Loss of a Double-Leaf Partition Inserted with a Microperforated Panel

Noise control of an acoustic enclosure covered by a double-wall structure with shallow gap: Design of resonator-like cavities

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