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Acoustic, Visual and Spatial Indicators for the Description of the Soundscape of Waterfront Areas with and without Road Traffic Flow

View Article: PubMed Central - PubMed

ABSTRACT

High flows of road traffic noise in urban agglomerations can negatively affect the livability of squares and parks located at the neighborhood, district and city levels, therefore pushing anyone who wants to enjoy calmer, quieter areas to move to non-urban parks. Due to the distances between these areas, it is not possible to go as regularly as would be necessary to satisfy any needs. Even if cities are densely populated, the presence of a sea or riverfront offers the possibility of large restorative places, or at least with potential features for being the natural core of an urban nucleus after a renewal intervention. This study evaluates the soundscape of the Naples waterfront, presenting an overview of the most significant visual, acoustic and spatial factors related to the pedestrian areas, as well as areas open to road traffic and others where the road traffic is limited. The factors were chosen with feature selection methods and artificial neural networks. The results show how certain factors, such as the perimeter between the water and promenade, the visibility of the sea or the density of green areas, can affect the perception of the soundscape quality in the areas with road traffic. In the pedestrian areas, acoustic factors, such as loudness or the A-weighted sound level exceeded for 10% of the measurement duration (LA10), influence the perceived quality of the soundscape.

No MeSH data available.


Related in: MedlinePlus

Boxplot of the appraisals of the soundscape quality, (rated in a 7 points Likert scale from 1 (very low) till 7 (excellent)), in the three types of areas a priori classified as pedestrian areas, open to road traffic areas and limited traffic areas (bottom horizontal axis).
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ijerph-13-00934-f005: Boxplot of the appraisals of the soundscape quality, (rated in a 7 points Likert scale from 1 (very low) till 7 (excellent)), in the three types of areas a priori classified as pedestrian areas, open to road traffic areas and limited traffic areas (bottom horizontal axis).

Mentions: The acoustic, spatial and visual parameters were analysed in comparison with the appraisals on the soundscape quality in the three groups (see Figure 5, Table 2 and Table 3). The pedestrian areas are the ones with more positive appraisals of the soundscape quality, with a median value of 5, and a mean value of 5.2 (see Figure 5). This group has the smallest range of answers, with scores from 2 to 7 that also indicate less negative scores. The road traffic areas have a negative median value (3) and mean score (3.3), being, as expected, the group with the worst appraisals. Most of the appraisals on the soundscape quality of this group are between 2 and 5 (first and third quartile), being the group with the most spread answers. The mean levels of LAeq are quite high even in the pedestrian areas. This is due to the dense and loud anthropogenic activities at the Naples waterfront.


Acoustic, Visual and Spatial Indicators for the Description of the Soundscape of Waterfront Areas with and without Road Traffic Flow
Boxplot of the appraisals of the soundscape quality, (rated in a 7 points Likert scale from 1 (very low) till 7 (excellent)), in the three types of areas a priori classified as pedestrian areas, open to road traffic areas and limited traffic areas (bottom horizontal axis).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5036766&req=5

ijerph-13-00934-f005: Boxplot of the appraisals of the soundscape quality, (rated in a 7 points Likert scale from 1 (very low) till 7 (excellent)), in the three types of areas a priori classified as pedestrian areas, open to road traffic areas and limited traffic areas (bottom horizontal axis).
Mentions: The acoustic, spatial and visual parameters were analysed in comparison with the appraisals on the soundscape quality in the three groups (see Figure 5, Table 2 and Table 3). The pedestrian areas are the ones with more positive appraisals of the soundscape quality, with a median value of 5, and a mean value of 5.2 (see Figure 5). This group has the smallest range of answers, with scores from 2 to 7 that also indicate less negative scores. The road traffic areas have a negative median value (3) and mean score (3.3), being, as expected, the group with the worst appraisals. Most of the appraisals on the soundscape quality of this group are between 2 and 5 (first and third quartile), being the group with the most spread answers. The mean levels of LAeq are quite high even in the pedestrian areas. This is due to the dense and loud anthropogenic activities at the Naples waterfront.

View Article: PubMed Central - PubMed

ABSTRACT

High flows of road traffic noise in urban agglomerations can negatively affect the livability of squares and parks located at the neighborhood, district and city levels, therefore pushing anyone who wants to enjoy calmer, quieter areas to move to non-urban parks. Due to the distances between these areas, it is not possible to go as regularly as would be necessary to satisfy any needs. Even if cities are densely populated, the presence of a sea or riverfront offers the possibility of large restorative places, or at least with potential features for being the natural core of an urban nucleus after a renewal intervention. This study evaluates the soundscape of the Naples waterfront, presenting an overview of the most significant visual, acoustic and spatial factors related to the pedestrian areas, as well as areas open to road traffic and others where the road traffic is limited. The factors were chosen with feature selection methods and artificial neural networks. The results show how certain factors, such as the perimeter between the water and promenade, the visibility of the sea or the density of green areas, can affect the perception of the soundscape quality in the areas with road traffic. In the pedestrian areas, acoustic factors, such as loudness or the A-weighted sound level exceeded for 10% of the measurement duration (LA10), influence the perceived quality of the soundscape.

No MeSH data available.


Related in: MedlinePlus