Sazali Yaacob
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Preferred name
Sazali Yaacob
Official Name
Sazali, Yaacob
Alternative Name
Yaacob, S.
Bin Yaacob, Sazali
Yaacob, S. B.
Yaacob, Sazali B.
Main Affiliation
Scopus Author ID
6602262501

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  • Publication
    Analysis of accent-sensitive words in multi-resolution mel-frequency cepstral coefficients for classification of accents in Malaysian English
    ( 2013-06)
    M.A. Yusnita
    ;
    M.P. Paulraj
    ;
    Sazali Yaacob
    ;
    R. Yusuf
    ;
    Shahriman Abu Bakar
    This paper investigates the most accent-sensitive words for Malaysian English (MalE) speakers in multi-resolution 13 Mel-frequency cepstral coefficients. A text-independent accent system was implemented using different numbers of Mel-filters to determine the optimal settings for this database. Then, text-dependent accent systems were developed to rank the most accent-sensitive words for MalE speakers according to the classification rates. Prior work has also been conducted to test the significance of the wordlist for both gender and accent factors, and to investigate any interaction between these two factors. Experimental results show that male speakers have a higher intensity of accent effects compared with female speakers by 3.91% on text-independent and 3.47% on text-dependent tasks. Another finding has proven that by selecting appropriate words that carry severe accent markers could improve the task of speaker accent classification. An improvement of at most 8.45% and 8.91% was achieved on the male and female datasets, respectively, following vocabulary selection.
      4  38
  • Publication
    Ultrasound processing circuitry for ultrasonic tomography
    (Universiti Malaysia Perlis (UniMAP), 2009-10-11)
    Nor Muzakkir Nor Ayob
    ;
    Mohd Hafiz Fazalul Rahiman
    ;
    Sazali Yaacob
    ;
    Ruzairi Abdul Rahim
    The development of an ultrasonic transmission tomography system is described. The system is intended for the imaging of two component flows (such as gas/water) inside pipes of industrial processes. Transmission-mode approach has been used for sensing the gas/liquid two-phase flow, which is a kind of strongly inhomogeneous medium. A prototype fixture of vertical column and a prototype design of sensor’s jig for ultrasonic tomography imaging are used. The fixture of the vertical column is designed to hold the sensor’s jig that will have the 16-pairs of ultrasonic sensors attached to it. The investigations were based on the transmission and the reception of ultrasonic sensors that were mounted circularly on the surface of experimental vessel. This paper also explains the hardware and circuitry design for the Ultrasonic Tomography System. Detailed explanation are presented on the sampling circuits used to sample the ultrasonic wave which is then to be sent to the personal computer (PC) for end-user interpretation which will display the reconstructed tomography images.