All Outputs (8)

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)
Journal Article
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.