Infrasonic sound pressure in dwellings at the Helmholtz resonance actuated by environmental noise and vibration

Vinokur, Roman

doi:10.1016/s0003-682x(03)00117-8

Cited by 7 publications

(7 citation statements)

References 4 publications

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“…This is attributable to the fact that the coefficient of acoustic absorption, α, is varied for each frequency of sound. As a simplification, the division of the audible frequency spectrum into octaves (with a further 1/3 octave division) is used, as well as, for example, such characteristics as noise reduction coefficient (NRC) and sound absorption average (SAA) [ 8 , 16 , 41 ]. NRC is a part of the easiest approaches that could be estimated as the arithmetic mean of sound absorption coefficient at frequency ranging between 250 and 2000 Hz.…”

Section: Types Of Acoustic Insulating Materialsmentioning

confidence: 99%

“…During the construction and operation of these buildings, it is necessary to ensure comfortable living conditions for people [ 7 ]. The most important step along this path is ensuring the acoustic well-being of residents through the optimal design of building envelopes [ 8 , 9 , 10 ]. Usually, when a sound wave strikes or hits the surface of a building, the sound energy gets absorbed, transmitted, or reflected away [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Acoustic Properties of Innovative Concretes: A Review

et al. 2021

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Concrete is the most common building material; therefore, when designing structures, it is obligatory to consider all structural parameters and design characteristics such as acoustic properties. In particular, this is to ensure comfortable living conditions for people in residential premises, including acoustic comfort. Different types of concrete behave differently as a sound conductor; especially dense mixtures are superior sound reflectors, and light ones are sound absorbers. It is found that the level of sound reflection in modified concrete is highly dependent on the type of aggregates, size and distribution of pores, and changes in concrete mix design constituents. The sound absorption of acoustic insulation concrete (AIC) can be improved by forming open pores in concrete matrices by either using a porous aggregate or foam agent. To this end, this article reviews the noise and sound transmission in buildings, types of acoustic insulating materials, and the AIC properties. This literature study also provides a critical review on the type of concretes, the acoustic insulation of buildings and their components, the assessment of sound insulation of structures, as well as synopsizes the research development trends to generate comprehensive insights into the potential applications of AIC as applicable material to mitigate noise pollution for increase productivity, health, and well-being.

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Section: Types Of Acoustic Insulating Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acoustic Properties of Innovative Concretes: A Review

et al. 2021

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“…This is due to the acoustic absorption coefficient α varies for each sound frequency (Table 1). The rubber ball index/impact of Japanese [27,29,30] STC ASTM E 413 Airborne sound conveyance category, computed in the same way as R W [24,31,32] As a simplification, the division of the audible frequency spectrum into octaves (with a further one-third octave division) is used, as well as, for example, such characteristics as sound absorption average (SAA) and noise reduction coefficient (NRC) [3,7,33]. Table 2 shows the sound absorption coefficient of different types of materials.…”

Section: Representative Acoustic Absorption Indicatorsmentioning

confidence: 99%

“…The application areas of sound-absorbing concrete are quite diverse: in civil engineering, this is soundproofing the facades of buildings and interior partitions; and in town planning, for example, the creation of soundproofing fences on high-speed roads. Another critical factor is the protection against infrasound occurring near wind power stations, railway bridges, cooling towers, and inside automobiles [3][4][5]. In addition, the possibility of protection against infrasonic acoustic weapons has recently become important.…”

Section: Introductionmentioning

confidence: 99%

Sound-Absorbing Acoustic Concretes: A Review

et al. 2021

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Noise is continuously treated as an annoyance to humans and indeed commotion contamination shows up within the environment, causing inconvenience. This is likewise interesting to the engineering tactic that inclines to develop this noise proliferation. The basics of the sound-retaining proliferation, sound-absorbing properties, and its variables were rarely considered by previous researchers. Thus, the acoustic performance and sound insulation of constructions have gained significance over the last five decades due to the trend for accommodating inner-city flat and multi-story residential building condominiums. Due to this dilemma, the proliferation of high-driven entertaining schemes has engaged extraordinary demands on building for its acoustic performance. Yet, construction industries worldwide have started to mainly use sound-absorbing concrete to reduce the frequency of sounds in opened-and-closed areas and increase sound insulation. As reported, the concrete acoustic properties generally rely on its density, exhibiting that the lighter ones, such as cellular concrete, will absorb more sound than high-density concretes. However, this paper has an objective to afford a wide-ranging review of sound-absorbing acoustic concretes, including the measurement techniques and insulation characteristics of building materials and the sound absorption properties of construction materials. It is also intended to extensively review to provide insights into the possible use of a typical sound-absorbing acoustic concrete in today’s building industry to enhance housing occupants’ efficiency, comfort, well-being, and safety.

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“…The characteristic frequency of the Helmholtz resonator corresponds to the sound wave of the wavelength which greatly exceeds the size of the resonator, and is governed by its volume and the mass of the fluid [4,5]. When the acoustic wavelength notably exceeds the resonatorÕs dimension, the gas in and near the neck moves compressing and expanding the gas volume, and the vibration system, which is similar to a 0045-7930/$ -see front matter Ó 2005 Elsevier Ltd. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%