Active control of double-glazed windows. Part II: Feedback control

Jakob, André; Möser, Michael

doi:10.1016/s0003-682x(02)00071-3

Cited by 41 publications

(25 citation statements)

References 2 publications

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“…A comprehensive overview that gives an insight into the physics of active noise control of double-glazed windows using several systems of loudspeakers and microphones inside the cavity has been presented by Jakob and Möser. They achieved nearly 8 dB and 5 dB reductions in the total sound pressure level using feedforward 4 and adaptive feedback controllers, 5 respectively. Unfortunately, the implementation of ANC methods in the frequency range from 2 kHz to 5 kHz is an extremely challenging task, which is very difficult to accomplish in real-life systems.…”

Section: Introductionmentioning

confidence: 99%

Noise suppression in curved glass shells using macro-fiber-composite actuators studied by the means of digital holography and acoustic measurements

et al. 2015

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The paper presents methods and experimental results of the semi-active control of noise transmission in a curved glass shell with attached piezoelectric macro fiber composite (MFC) actuators. The semi-active noise control is achieved via active elasticity control of piezoelectric actuators by connecting them to an active electric shunt circuit that has a negative effective capacitance. Using this approach, it is possible to suppress the vibration of the glass shell in the normal direction with respect to its surface and to increase the acoustic transmission loss of the piezoelectric MFC-glass composite structure. The effect of the MFC actuators connected to the negative capacitance shunt circuit on the surface distribution of the normal vibration amplitude is studied using frequency-shifted digital holography (FSDH). The principle of the used FSDH method is described in the paper. The frequency dependence of the acoustic transmission loss through the piezoelectric MFC-glass composite structure is estimated using measurements of the specific acoustic impedance of the curved glass shell. The specific acoustic impedance is measured using two microphones and a laser Doppler vibrometer (LDV). The results from the LDV measurements are compared with the FSDH data. The results of the experiments show that using this approach, the acoustic transmission loss in a glass shell can be increased by 36 dB in the frequency range around 247 Hz and by 25 dB in the frequency range around 258 Hz. The experiments indicate that FSDH measurements provide an efficient tool that can be used for fast and accurate measurements of the acoustic transmission loss in large planar structures.

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Section: Introductionmentioning

confidence: 99%

Noise suppression in curved glass shells using macro-fiber-composite actuators studied by the means of digital holography and acoustic measurements

et al. 2015

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“…Here it can become even poorer than that of a single plate [1,2]. Over the past decades, there have been a numerous amount of analytical and experimental researches on active control of sound transmission through double plate structures, and significant gains were obtained by using the active noise control (ANC) approach [1][2][3][4][5][6] as well as active structural acoustic control (ASAC) approach [2,7,8]. For example, in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Refs. [5,6] investigated the influence of different loudspeaker and microphones positions inside a double glazed window for feedforward control as well as feedback control. However, some unresolved problems seriously compromise efficient real active control systems.…”

Section: Introductionmentioning

confidence: 99%

Experimental study for control of sound transmission through double glazed window using optimally tuned Helmholtz resonators

Mao

Pietrzko

2010

Applied Acoustics

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“…And some active noise control system is expected to be effective for increasing sound transmission loss of panel at low frequency region without adding mass. Several researches were already reported, and effective results were obtained (4) - (7) . But these were not aimed to be light and simple.…”

Section: Introductionmentioning

confidence: 99%

Feedback Control of an Active Sound Insulation Unit

Kanamori

Nishimura

Mishiro

2006

JSME Int. J., Ser. C

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This paper describes designs of structures and control systems of an active sound insulation unit consisting of active cells which are individually controlled as a single input single output system. Two types of Active Sound Insulation Cell (ASIC) using lightweight card-type speakers were manufactured for trial. It became clear that ASIC can reduce the transmitted noise whose sound field inside the cell is uniform. That means that the size of ASIC should be less than quarter wavelength of controlled sound and secondary noise sources should be properly arranged. The feedback control system for ANC was systematically designed by Hinfinity control theory, and the sound attenuating performance was verified by the simulation.

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Active control of double-glazed windows. Part II: Feedback control

Cited by 41 publications

References 2 publications

Noise suppression in curved glass shells using macro-fiber-composite actuators studied by the means of digital holography and acoustic measurements

Noise suppression in curved glass shells using macro-fiber-composite actuators studied by the means of digital holography and acoustic measurements

Experimental study for control of sound transmission through double glazed window using optimally tuned Helmholtz resonators

Feedback Control of an Active Sound Insulation Unit

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