The purpose of introducing sounds is to afford a comfortable acoustic environment and to design good soundscapes. This study aims at rating the preference of subjects for the introduced sounds suitable to the public spaces and also investigates the methodology to select the sounds by subjective and objective procedures. Seventeen kinds of the introduced sounds were evaluated with nine adjectives in the presence of visual location information. Also, adequate sound levels were calculated by adjusting the volume of introduced sounds in the presence of the actual background sounds of locations and visual information. The concept of harmony with the surroundings was reviewed by analyzing the correlation among 9 adjectives which express introduced sounds. And the effectiveness of existed sound quality index was analyzed so as to select the introduced sounds quantitatively. By the evaluation of the adequate level of the introduced sounds, it is proposed that the lower introduced sound level would be better for the noisy circumstances.
Several studies on audio-visual interactions have shown that the visual stimulus can influence loudness of traffic noise. And it was shown that the auditory stimulus such as music in the street can reduce the road traffic noise perception. On the base of these results, a series of experimental studies were carried out and reviewed the psychological effect of visual and auditory stimuli on the perception of road traffic noise.The first experiment was designed to assess the visual effect of twelve roadsides with different landscapes on the road traffic noise perception. As a result, approx. 3 to 5 dB(A) of psychological reduction was seen in places where natural landscape was preferred, compared to the others, although the noise levels were similar. The second experiment was designed to evaluate the effect of visual screening from adjacent roads on road traffic noise perception by means of ME method in a laboratory. As the result, the effect of psychological reduction was observed at 65 dB(A) or lower. Especially, the barrier which screening optically from adjacent roads led to 5 to 10% of loudness reduction effect, compared to non-screening cases.Finally, the third experiment was designed to evaluate the effect of visual and auditory stimuli with ME method and 7-point SD rating scale in a laboratory. And it was found that up to 10% of loudness reduction and about 2 dB(A) of noise perceptional reduction were seen at 65 dB(A) or lower.
This study was focused on the influence of soundscape provided to the interior landscape on the improvement of occupants' sound environment. When soundscape was provided to occupants together with the interior landscape rather than simply providing interior landscape, the occupants' satisfaction seemed to be improved. The most preferred sound source among the three sound sources was considered as the sound of the grasshopper. When both of the interior landscape and the landscape substances was provided, the adjectives with the average difference of more than 1 are "Vicissitudinous", "Elegant" and "Cheerful". When the interior landscape and the sound source were provided, such adjectives as "Vicissitudinous", "Complex" and "Cheerful" are extracted. When all the variables were provided, such adjectives as "Vicissitudinous", "Abundant" and "Cheerful" seem to show the difference of more than 1. Regarding "Vicissitudinous", it was possible to know that the average difference of more than 1.5 was the biggest. Regarding the relative values of the α wave and the β wave for each part, it seemed that the highest α wave was generated on the left parietal lobe of P3, while the lowest β wave was generated on the left and right frontal lobes of Fp1 and Fp2. According to this study, it was shown that the soundscape and the interior landscape seemed to influence the improvement of the occupants' sound environment.
Demands for Korean Traditional Residence Complexes as a more humane resident space have recently been increasing for the purposes of users' health and convenience, built with the purpose of reflecting various trends. This study is aimed at examining the physical characteristics of design in residence complexes by analyzing the physical characteristics of the sound environment as auditory elements of Hanok Complexes and the relationship between spatial and visual test values. The results were shown as follows: In subjective evaluation at Hanok, Natural sounds were recognized higher but artificial sounds were lower. According to the interrelationship analysis between subjective evaluation and physical measurement values, entrance (regular-StdDev), yard (regular-NbEm, friendly-G), waterside (regular-articulation index(rooms), StdDev, Lmin, Rem), etc had been shown highly related.
: This study investigated the elements of soundscape in and around the traditional Korean style housing complex and the standardized Korean style housing complex popularized as farm village by Traditional Korean style housing assistance policy located in the rural area of Jeollanam-do. The purpose of this study is to understand the phenomenon and characteristic differences of the sound environments in various observation points in order to utilize them as the important elements of sound scape to consider for standardized Korean style housing complex development in the future. As a result, the traditional housing in rural area led more positive evaluation of nature sounds than standardized, newly developed Korean style housing complex. In the list of noises in each residential development type, traffic sounds and construction noise were majorly ranked. However, nature sounds had high rate of response in the sounds of introduction request. Additionally, the sounds generated by human activities such as whispering and footsteps were also in the wish list. This may suggests that soundscape design needs to approach in cultural level of a society rather than simple investigation and treatment of individual sounds of natural and artificial.
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