Experimental study of wood acoustic absorption characteristics

Smardzewski, Jerzy; Batko, W.; Kamisiński, Tadeusz; Flach, Artur; Pilch, Adam; Dziurka, Dorota; Mirski, Radosław; Roszyk, Edward; Majewski, Adam

doi:10.1515/hf-2013-0160

Cited by 38 publications

(39 citation statements)

References 10 publications

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“…Low porosity and high specific impedance can reduce considerably the application possibilities of the above-mentioned materials as construction elements with effective sound absorption. Similar relationships exist between density and porosity, flow resistivity and specific surface impedance (Smardzewski et al 2014). Figure 3 presents real Re and imaginary Im components of the normal acoustic impedance on the surface determined experimentally and illustrates their course in the frequency function.…”

Section: Physic-mechanical Properties Of Wood-based Materialsmentioning

confidence: 74%

Sound absorption of wood-based materials

et al. 2015

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From modern buildings to public spaces are made of concrete, steel, and glass. These materials increase propagation of sound and the reverberation time. Therefore, furniture should be good sound absorbers in such places. The objective of this study was to ascertain acoustic properties of wood-based materials by determining normal acoustic impedance on the surface and sound absorption coefficients. Experiments were carried out on 17 types of wood-based materials commonly employed in furniture design and manufacture. Investigations were conducted based on the transferfunction method. It was demonstrated that for frequencies between 125 and 500 Hz, the highest capability of sound absorption was determined of low surface layer density and high porosity. Honeycomb panels with paper core absorbed better sounds in the range between 1 and 2 kHz. Panels of considerable external surface irregularities were characterized by the most favorable acoustic properties for the frequency of 4 kHz.

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Section: Physic-mechanical Properties Of Wood-based Materialsmentioning

confidence: 74%

Sound absorption of wood-based materials

et al. 2015

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“…To enhance the dampening effect of medium-to-high frequencies, a perforated resonator can be made by making holes or wooden battening on the wooden surface (Asdrubali et al 2017). In addition, the sound absorbing capability of wood has been enhanced by improving the permeability through different treatments (Kang et al 2008(Kang et al , 2010 or by producing wood composites from fibrous materials (Smardzewski et al 2014(Smardzewski et al , 2015.…”

Section: Acoustic Propertiesmentioning

confidence: 99%

The influence of wooden interior materials on indoor environment: a review

et al. 2020

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Environmental issues and health-benefitting design strategies have raised interest in natural and renewable building materials, resulting in an increased focus on the use of wood in built environment. The influence of wooden materials on measured and perceived indoor environment quality (IEQ) has gained attention during the past few decades, with a growing number of studies having explored the issue. This review was conducted to examine and summarise the body of research on the influence of wooden interior materials on IEQ, with an emphasis on the following themes: emissions of chemical compounds, moisture buffering of indoor air, antibacterial effects, acoustics, and psychological and physiological effects. This review found that wooden interior materials exert mainly positive or neutral effects on IEQ, such as moderating humidity fluctuations of indoor air, inducing positive feelings in occupants, and inhibiting certain bacteria. Negative effects on IEQ are limited to volatile organic compounds emitted from wood. The odour thresholds of some aldehydes and terpenes are low enough to affect the perceived IEQ. Additionally, concentrations of formaldehyde and acrolein may under certain conditions cause adverse health effects. Further studies are needed to better understand these phenomena and take advantage of the beneficial effects while hindering the unpleasant ones.

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“…This type of interaction makes wood one of the leading materials to be used in musical instruments [19]. Wood is not only well known for its acoustic quality in various musical instruments but also considered a sound absorber or sound diffuser [20] [21]. Wood's vibrational properties depend on the properties of that species of wood, the vibrator's size and shape and the direction of nodal lines relative to grain structure [22].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Wood Condition on Sound Wave Propagation

El-Hadad¹,

Brodie²,

Ahmed³

2018

OJA

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This experiment aims to study the effects and modifications that occurred on acoustic signal harmonics when travelling through wood. The experiment measured the output amplitudes and frequencies of the travelling signals and compared them with the original input signal. The factors under investigation in this experiment included: wood type, wood moisture content (MC), input signal frequencies, signal travelling distance and wood condition (wood with/without cracks). The experiment findings demonstrated that higher input signal frequencies results in higher attenuation of acoustic emissions (AE) travelling through the wood. The results also indicate that: wood type, MC, the signal's travelling distance, and the orientation of the travelling signal, compared to the wood's grain direction, affected the signal propagation.

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Experimental study of wood acoustic absorption characteristics

Cited by 38 publications

References 10 publications

Sound absorption of wood-based materials

Sound absorption of wood-based materials

The influence of wooden interior materials on indoor environment: a review

The Effect of Wood Condition on Sound Wave Propagation

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