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Showing 1 to 12 of 12 for “"Sound absorption coefficient"”.

  1. Application of cepstral signal processing techniques and a guard tube to the in-situ measurement of the normal incidence sound absorption coefficient

    Groll, NeilDepartment of Electrical Engineering1996

    … the in situ measurement of the normal incidence sound power absorption coefficient of homogenous materials. The work stemmed from an International Standards Organisation (ISO) working group, ISO/TC 43/SCJ WG38, tasked to formulate a new international standard: " Procedure for measuring sound …

    cape-town Repository record

  2. Sound absorption characteristic of lightweight brick containing Expanded Polystyrene Beads (EPS) and Palm Oil Fuel Ash (POFA)

    Kamarulzaman, Nurul AmirahUniversiti Tun Hussein Onn Malaysia2020

    … objectives of this research is to identify the sound absorption characteristic of lightweight bricks containing expanded polystyrene beads (EPS) and palm oil fuel ash (POFA). In order to fulfill the standard of a lightweight brick to be used as a building element, the physical and mechanical …

    uthm Repository record

  3. The effect of Meranti Merah wood fiber loading and sizes to the absorption property of polymer foam composites

    Zaliran, Muhammad TaufiqUniversiti Tun Hussein Onn Malaysia2018

    … Polymer foam composites (PFC) were developed for absorption material based on epoxy, renewable monomer from waste cooking oil, isocyanates and wood fiber fillers. The polymer foam composite (PFC) were fabricate based on four percentages of wood fiber filler loading which are 5, 10, 15, and 20 wt% …

    uthm Repository record

  4. Physical and acoustic properties of petroleum and renewable based polyurethane foam filled with shorea leprosula

    Mohd Azahari, Muhammad ShafiqUniversiti Tun Hussein Onn Malaysia2018

    … ability of polymer foam composites (PF) towards sound absorption coefficient (SAC) based on the wood fiber size with range of 150-200 μm (powder), 250-300 μm (fibrous) and 900-1000 μm (flakes). 5 wt%, 10 wt%, 15 wt% and 20 wt% of SL filler content and thickness of 10 mm, 20 mm and 30 mm were used …

    uthm Repository record

  5. Comparison of Sound Absorption Coefficients Obtained by Different Methods

    Willig, Frank JewellUniversity of Illinois at Urbana-Champaign1940

    uiuc Repository record

  6. Acoustical characteristics of oil palm mesocarp fibres

    Abd Latif, HanifUniversiti Tun Hussein Onn Malaysia2016

    … Incorporated polyurethane (PU) had improved the sound absorption coefficient (SAC), especially at low frequency range. The oil palm Mesocarp fibres were mixed with four different percentages of PU, namely 10%, 20%, 30% and 40%. The measurement of SAC was done using an impedance tube method (ITM). …

    uthm Repository record

  7. Acoustical characteristic of empty fruit bunch (EFB) fibre with influence of sodium hydroxide treatment time and decay lifespan

    Mat Wan, LaurenUniversiti Tun Hussein Onn Malaysia2019

    … which is the ability to maintain the quality of absorption due to the lack of information and research on the acoustic application. Thus, in this research, the untreated and treated Empty Fruit Bunch (EFB) fibre was investigated as control unit and the standard used for sound absorption test was …

    uthm Repository record

  8. Municipal solid waste mixed polymer composites based diapers waste (MSWPC-DW) for partition panel

    Mohd Fodzi, Muhammad HaikalUniversiti Tun Hussein Onn Malaysia2021

    … compressive strength at 12.09 MPa. In terms of sound absorption coefficient (SAC), MSWPC-DW ratios of 0.5 and 0.6 achieved the highest SAC of 0.93α at a frequency of 1250 Hz, while the ratio of 0.4 obtained the second highest SAC of 0.85α. In summary, these results show that ratio 0.4 of …

    uthm Repository record

  9. The evaluation of acoustic characteristic performance on natural sound absorbing materials from cogon grass waste

    Ahmad Nordin, Mohd Nor AzmiUniversiti Tun Hussein Onn Malaysia2019

    … fibers are been used widely in the field of sound absorption due to their superior characteristics such as durable and chemical resistant. However, there are several disadvantages of synthetic fibers such as non-biodegradability and hazards to the health of human. In this research, the …

    uthm Repository record

  10. The evaluation of acoustic characteristic performance on natural sound absorbing materials from cogon grass waste

    Ahmad Nordin, Mohd Nor AzmiUniversiti Tun Hussein Onn Malaysia2018

    … fibers are been used widely in the field of sound absorption due to their superior characteristics such as durable and chemical resistant. However, there are several disadvantages of synthetic fibers such as non-biodegradability and hazards to the health of human. In this research, the …

    uthm Repository record

  11. The evaluation of acoustic characteristic performance on natural sound absorbing materials from cogon grass waste

    Ahmad Nordin, Mohd Nor AzmiUniversiti Tun Hussein Onn Malaysia2019

    … fibers are been used widely in the field of sound absorption due to their superior characteristics such as durable and chemical resistant. However, there are several disadvantages of synthetic fibers such as non-biodegradability and hazards to the health of human. In this research, the …

    uthm Repository record

  12. SPECIAL APPLICATIONS OF IRREVERSIBLE THERMODYNAMICS

    ZILBERBERG, YAKOV MICHAEL

    … solids and fluids, namely, the absorption and propagation of the sound waves and the influence of thermal energy conduction and dissipation within the said media upon the phenomena is discussion.</p><p>The theoretical methods of such analysis, specifically those of evaluation of …

    unh-thes Repository record