All Outputs (63)

Insertion losses of balconies on a building façade and the underlying wave interactions (2014)
Journal Article
Tang, S. K., Ho, C. Y., & Tso, T. Y. (2014). Insertion losses of balconies on a building façade and the underlying wave interactions. The Journal of the Acoustical Society of America, 136(1), 213-225. https://doi.org/10.1121/1.4883379

This study used scale model experiments to investigate the insertion losses of balconies on a building façade in the presence of ground reflections. The experiments measured both A-weighted broad- and narrowband insertion loss spectra. The underlying... Read More about Insertion losses of balconies on a building façade and the underlying wave interactions.

Aeroacoustics of duct junction flows merging at different angles (2014)
Journal Article
Lam, G. C., Leung, R. C., & Tang, S. K. (2014). Aeroacoustics of duct junction flows merging at different angles. Journal of Sound and Vibration, 333(18), 4187-4202. https://doi.org/10.1016/j.jsv.2014.04.045

This paper reports an exploratory study of the aeroacoustics of a merging flow at a duct junction with the same width in all branches and different merging angles. The focus is put on the acoustic generation due to the flow unsteadiness. The study is... Read More about Aeroacoustics of duct junction flows merging at different angles.

Validation of CE/SE scheme in low mach number direct aeroacoustic simulation (2014)
Journal Article
Lam, G. C., Leung, R. C., Seid, K. H., & Tang, S. K. (2014). Validation of CE/SE scheme in low mach number direct aeroacoustic simulation. International Journal of Nonlinear Sciences and Numerical Simulation, 15(2), 157-169. https://doi.org/10.1515/ijnsns-2012-0118

The space-time conservation element and solution element (CE/SE) scheme has caught many attentionin aeroacoustic research community as an alternative numerical strategy for direct aeroacoustic simulation (DAS).As a result of its strict conversation o... Read More about Validation of CE/SE scheme in low mach number direct aeroacoustic simulation.

Neural network predictions of acoustical parameters in multi-purpose performance halls (2013)
Journal Article
Cheung, L. Y., & Tang, S. K. (2013). Neural network predictions of acoustical parameters in multi-purpose performance halls. The Journal of the Acoustical Society of America, 134(3), 2049-2065. https://doi.org/10.1121/1.4817880

A detailed binaural sound measurement was carried out in two multi-purpose performance halls of different seating capacities and designs in Hong Kong in the present study. The effectiveness of using neural network in the predictions of the acoustical... Read More about Neural network predictions of acoustical parameters in multi-purpose performance halls.

Plenum window insertion loss in the presence of a line source - A scale model study (2013)
Journal Article
Tong, Y. G., & Tang, S. K. (2013). Plenum window insertion loss in the presence of a line source - A scale model study. The Journal of the Acoustical Society of America, 133(3), 1458-1467. https://doi.org/10.1121/1.4788996

The acoustical insertion losses of plenum windows installed on a building facade in the presence of a non-parallel line source are studied by using a 1:4 scaled down model in a semi-anechoic chamber in the present investigation. Two types of insertio... Read More about Plenum window insertion loss in the presence of a line source - A scale model study.

Aeroacoustics of T-junction merging flow (2013)
Journal Article
Lam, G. C., Leung, R. C., & Tang, S. K. (2013). Aeroacoustics of T-junction merging flow. The Journal of the Acoustical Society of America, 133(2), 697-708. https://doi.org/10.1121/1.4773351

This paper reports a numerical study of the aeroacoustics of merging flow at T-junction. The primary focus is to elucidate the acoustic generation by the flow unsteadiness. The study is conducted by performing direct aeroacoustic simulation approach,... Read More about Aeroacoustics of T-junction merging flow.

Narrow sidebranch arrays for low frequency duct noise control (2012)
Journal Article
Tang, S. K. (2012). Narrow sidebranch arrays for low frequency duct noise control. The Journal of the Acoustical Society of America, 132(5), 3086-3097. https://doi.org/10.1121/1.4756951

The present study investigates the sound transmission loss across a section of an infinitely long duct where one or more narrow sidebranch tubes are installed flushed with the duct wall. The finite-element method is used to compute the wave propagati... Read More about Narrow sidebranch arrays for low frequency duct noise control.

A directionally tunable but frequency-invariant beamformer on an acoustic velocity-sensor triad to enhance speech perception (2012)
Presentation / Conference Contribution
Wu, Y. I., Wong, K. T., Yuan, X., Lau, S. K., & Tang, S. K. (2012). A directionally tunable but frequency-invariant beamformer on an acoustic velocity-sensor triad to enhance speech perception. The Journal of the Acoustical Society of America, 131(5), 3891-3902. https://doi.org/10.1121/1.3701991

Herein investigated are computationally simple microphone-array beamformers that are independent of the frequency-spectra of all signals, all interference, and all noises. These beamformers allow the listener to tune the desired azimuth-elevation "lo... Read More about A directionally tunable but frequency-invariant beamformer on an acoustic velocity-sensor triad to enhance speech perception.

Experimental investigation of the sound absorption performance of compartmented Helmholtz resonators (2012)
Journal Article
Tang, S. K., Ng, C. H., & Lam, E. Y. (2012). Experimental investigation of the sound absorption performance of compartmented Helmholtz resonators. Applied acoustics. Acoustique appliqué. Angewandte Akustik, 73(9), 969-976. https://doi.org/10.1016/j.apacoust.2012.03.016

An experiment was derived in the present study to investigate the effects of coupling up two Helmholtz resonators on their overall sound absorption performance. The effect of compartmenting the cavity of a resonator on its sound absorption property w... Read More about Experimental investigation of the sound absorption performance of compartmented Helmholtz resonators.

Perception of urban park soundscape (2012)
Journal Article
Tse, M. S., Chau, C. K., Choy, Y. S., Tsui, W. K., Chan, C. N., & Tang, S. K. (2012). Perception of urban park soundscape. The Journal of the Acoustical Society of America, 131(4), 2762-2771. https://doi.org/10.1121/1.3693644

A number of studies have been initiated to explore how to improve the soundscape quality in urban parks. However, good soundscape quality in parks cannot be provided without a thorough understanding of the complex relationships among sound, environme... Read More about Perception of urban park soundscape.

On the study of the effects of sea views, greenery views and personal characteristics on noise annoyance perception at homes (2012)
Journal Article
Nang Li, H., Kwan Chau, C., Sze Tse, M., & Tang, S. K. (2012). On the study of the effects of sea views, greenery views and personal characteristics on noise annoyance perception at homes. The Journal of the Acoustical Society of America, 131(3), 2131-2140. https://doi.org/10.1121/1.3681936

Noise annoyance has caused significant adverse impacts on human beings and numerous efforts have been spent on mitigating annoyance problems. Natural greenery has been shown to be able to moderate annoyance problems at home but this conclusion was dr... Read More about On the study of the effects of sea views, greenery views and personal characteristics on noise annoyance perception at homes.

On the recovery of moving source characteristics using time-frequency approach (2011)
Journal Article
Tam, K. C., Tang, S. K., & Lau, S. K. (2012). On the recovery of moving source characteristics using time-frequency approach. Applied acoustics. Acoustique appliqué. Angewandte Akustik, 73(4), 366-378. https://doi.org/10.1016/j.apacoust.2011.10.012

Four time-frequency analysis techniques, namely the short-time Fourier transform, the wavelet transform, the polynomial phase estimation and the Chirplet transform, are used in the present study to recover the moving speed, the sound frequency and th... Read More about On the recovery of moving source characteristics using time-frequency approach.

On weak unsteady signal detection using statistical tests (2011)
Journal Article
Chan, C. M., Tang, S. K., Wong, H., & Lee, W. L. (2012). On weak unsteady signal detection using statistical tests. Applied acoustics. Acoustique appliqué. Angewandte Akustik, 73(2), 164-172. https://doi.org/10.1016/j.apacoust.2011.06.018

Two statistical tests, namely the Jarque-Bera and the D'Agostino tests, originally adopted for checking data normality are used to recover the initialization of an exponentially growing wave embedded inside a stationary background noise in the presen... Read More about On weak unsteady signal detection using statistical tests.

Full scale model investigation on the acoustical protection of a balcony-like faade device (L) (2011)
Journal Article
Tong, Y. G., Tang, S. K., & Yeung, M. K. (2011). Full scale model investigation on the acoustical protection of a balcony-like faade device (L). The Journal of the Acoustical Society of America, 130(2), 673-676. https://doi.org/10.1121/1.3598430

The acoustical insertion losses produced by a balcony-like structure in front of a window are examined experimentally. The results suggest that the balcony ceiling is the most appropriate location for the installation of artificial sound absorption f... Read More about Full scale model investigation on the acoustical protection of a balcony-like faade device (L).

Sound fields inside street canyons with inclined flanking building façades (2011)
Presentation / Conference Contribution
Tang, S. K., & Piippo, K. E. (2011). Sound fields inside street canyons with inclined flanking building façades. Proceedings of Meetings on Acoustics, 12(1), https://doi.org/10.1121/1.3624578

Street canyons are common in modern cities. It is well known that the multiple sound reflections within the canyons tend to increase the noise levels inside the canyons. An scaled down model experiment was conducted in the present investigation to st... Read More about Sound fields inside street canyons with inclined flanking building façades.

Dual cylinder inviscid vortex sound of low Mach number (2011)
Journal Article
Tang, S. K. (2011). Dual cylinder inviscid vortex sound of low Mach number. Journal of Fluids and Structures, 27(8), 1337-1348. https://doi.org/10.1016/j.jfluidstructs.2011.06.011

The unsteady motions of an inviscid vortex under the influence of a cylinder pair in the presence of a low Mach number mean flow and the corresponding sound generation are examined in the present study. The two cylinders are in close proximity. A sem... Read More about Dual cylinder inviscid vortex sound of low Mach number.

The characteristics of acoustic line array prototypes for scale model experiments (2011)
Journal Article
Piippo, K. E., & Tang, S. K. (2011). The characteristics of acoustic line array prototypes for scale model experiments. Applied acoustics. Acoustique appliqué. Angewandte Akustik, 72(11), 884-888. https://doi.org/10.1016/j.apacoust.2011.05.001

The sound fields created by three different settings of a 5 m long linear loudspeaker array were studied experimentally in the present investigation in an attempt to find out a method to produce a reasonable sound field for scaled down model experime... Read More about The characteristics of acoustic line array prototypes for scale model experiments.

Vortex sound in the presence of a low Mach number flow across a drum-like silencer (2011)
Journal Article
Tang, S. K. (2011). Vortex sound in the presence of a low Mach number flow across a drum-like silencer. The Journal of the Acoustical Society of America, 129(5), 2830-2840. https://doi.org/10.1121/1.3562567

The sound generated by a vortex propagating across a two-dimensional duct section with flexible walls (membranes) in an infinitely long rigid duct conveying a flow is investigated numerically using the matched asymptotic expansion technique and the p... Read More about Vortex sound in the presence of a low Mach number flow across a drum-like silencer.

Passive noise control by enhancing aeroacoustic interference due to structural discontinuities in close proximity (2011)
Journal Article
Leung, R. C., So, R. M., Tang, S. K., & Wang, X. Q. (2011). Passive noise control by enhancing aeroacoustic interference due to structural discontinuities in close proximity. Journal of Sound and Vibration, 330(14), 3316-3333. https://doi.org/10.1016/j.jsv.2011.02.011

In-duct devices are commonly installed in flow ducts for various flow management purposes. The structural construction of these devices indispensably creates disruption to smooth flow through duct passages so they exist as structural discontinuities... Read More about Passive noise control by enhancing aeroacoustic interference due to structural discontinuities in close proximity.

Beacon-aided adaptive localization of noise sources aboard a pass-by railcar using a trackside microphone array (2010)
Journal Article
Wu, Y. I., Lau, S. K., Wong, K. T., & Tang, S. K. (2010). Beacon-aided adaptive localization of noise sources aboard a pass-by railcar using a trackside microphone array. IEEE Transactions on Vehicular Technology, 59(8), 3720-3727. https://doi.org/10.1109/TVT.2010.2059056

A new adaptive "beamforming" signal-processing algorithm is developed to locate the loudest noise sources aboard a railcar that passes by a trackside immobile microphone array. This proposed microphone-array beamformer tracks the railcar's spatial mo... Read More about Beacon-aided adaptive localization of noise sources aboard a pass-by railcar using a trackside microphone array.