Dynamics of traffic noise in a tropical city Varanasi and its abatement through vegetation

Pathak, Vinita; Tripathi, B. D.; Mishra, Virendra Kumar

doi:10.1007/s10661-007-0060-1

Cited by 71 publications

(37 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The porous surface of these objects offer significant absorption coefficient at high frequency sound [18]. Both research by Costa [6] and Wong [7] also confirmed that vegetation possesses great absorption coefficient at higher frequency. It is because sounds at low frequencies are of longer wavelength [19] which could not be absorbed by such tiny leaf and stoma.…”

Section: Theoretical Approachmentioning

confidence: 87%

“…Bernatzky [5] marked that greater noise attenuation of 12 dB was offered by parks. Moreover, Pathak et al [6] revealed that H. rosasinensis reduced noise at both low and high frequencies of 26 dB, M. peniculata of 20 dB, P. roxburghi of 17 dB and C. nocturnum of 14 dB. Findings of [3] to [6] are debatable, since they require deeper analysis on whether it was greenery or distance that reduced the noise.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reducing Indoor Noise Levels Using People’s Perception on Greenery

Mediastika¹,

Binarti²

2013

Scientific Journal of Riga Technical University. Environmental and Climate Technologies

View full text Add to dashboard Cite

Employees working in cubicles of open-plan offices in Indonesia were studied in regard to their perception on the ability of indoor greenery to reduce noise levels. Sansevieria trifasciata and Scindapsus sp were used. Each was placed in the cubicle and noise levels were measured without plants, with Sansevieria, and with Scindapsus in place. The meters showed very insignificant difference. However, responses to surveys indicated a perception of lower noise in the presence of greenery. This seemed to be supported by prior knowledge and preconception and may be useful in creating a "quieter" indoor environment. Abstract -Employees working in cubicles of open-plan offices in Indonesia were studied in regard to their perception on the ability of indoor greenery to reduce noise levels. Sansevieria trifasciata and Scindapsus sp were used. Each was placed in the cubicle and noise levels were measured without plants, with Sansevieria, and with Scindapsus in place. The meters showed very insignificant difference. However, responses to surveys indicated a perception of lower noise in the presence of greenery. This seemed to be supported by prior knowledge and preconception and may be useful in creating a "quieter" indoor environment. Keywords

show abstract

Section: Theoretical Approachmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Reducing Indoor Noise Levels Using People’s Perception on Greenery

Mediastika¹,

Binarti²

2013

Scientific Journal of Riga Technical University. Environmental and Climate Technologies

View full text Add to dashboard Cite

show abstract

“…Conclusions in scientific reports regarding the effectiveness of vegetation belts [61][62][63][64][65] are quite divergent. In response, using vegetation belts to tackle road traffic noise has not been promoted in most noise control books (e.g.…”

Section: Vegetation Beltsmentioning

confidence: 99%

Using natural means to reduce surface transport noise during propagation outdoors

et al. 2015

View full text Add to dashboard Cite

a b s t r a c tThis paper reviews ways of reducing surface transport noise by natural means. The noise abatement solutions of interest can be easily (visually) incorporated in the landscape or help with greening the (sub)urban environment. They include vegetated surfaces (applied to faces or tops of noise walls and on buildings' façades and roofs), caged piles of stones (gabions), vegetation belts (tree belts, shrub zones and hedges), earth berms and various ways of exploiting ground-surface-related effects. The ideas presented in this overview have been tested in the laboratory and/or numerically evaluated in order to assess or enhance the noise abatement they could provide. Some in-situ experiments are discussed as well. When well designed, such natural devices have the potential to abate surface transport noise, possibly by complementing and sometimes improving common (non-natural) noise reducing devices or measures. Their applicability strongly depends on the available space reserved for the noise abatement and the receiver position.

show abstract

“…The acoustical effect of a belt of trees/vegetation near roads has been a popular research topic over the past 40 [10]. The conclusions drawn from such experiments are, however, often quite different.…”

Section: Introductionmentioning

confidence: 99%

Road traffic noise shielding by vegetation belts of limited depth

Renterghem

Botteldooren

Verheyen

2012

Journal of Sound and Vibration

160

View full text Add to dashboard Cite

Road traffic noise propagation through a vegetation belt of limited depth (15 m) containing periodicallyarranged trees along a road is numerically assessed by means of 3D finite-difference time-domain (FDTD) calculations. The computational cost is reduced by only modeling a representative strip of the planting scheme and assuming periodic extension by applying mirror planes. With increasing tree stem diameter and decreasing spacing, traffic noise insertion loss is predicted to be more pronounced for each planting scheme considered (simple cubic, rectangular, triangular and face-centered cubic). For rectangular schemes, the spacing parallel to the road axis is predicted to be the determining parameter for the acoustic performance. Significant noise reduction is predicted to occur for a tree spacing of less than 3 m and a tree stem diameter of more than 0.11 m. This positive effect comes on top of the increase in ground effect (near 3 dBA for a light vehicle at 70 km/h) when compared to sound propagation over grassland. The noise reducing effect of the forest floor and the optimized tree belt arrangement are found to be of similar importance in the calculations performed. The effect of shrubs with typical above-ground biomass is estimated to be at maximum 2 dBA in the uniform scattering approach applied for a light vehicle at 70 km/h. Downward scattering from tree crowns is predicted to be smaller than 1 dBA for a light vehicle at 70 km/h, for various distributions of scattering elements representing the tree crown. The effect of the presence of tree stems, shrubs and tree crowns is predicted to be approximately additive.Inducing some (pseudo)randomness in stem centre location, tree diameter, and omitting a limited number of rows with trees seem to hardly affect the insertion loss. These predictions suggest that practically achievable vegetation belts can compete to the noise reducing performance of a classical thin noise barrier (on grassland) with a height of 1 to 1.5 m (in a non-refracting atmosphere).

show abstract

Dynamics of traffic noise in a tropical city Varanasi and its abatement through vegetation

Cited by 71 publications

References 20 publications

Reducing Indoor Noise Levels Using People’s Perception on Greenery

Reducing Indoor Noise Levels Using People’s Perception on Greenery

Using natural means to reduce surface transport noise during propagation outdoors

Road traffic noise shielding by vegetation belts of limited depth

Contact Info

Product

Resources

About