Assessment criterion for indoor noise disturbance in the presence of low frequency sources

Establishing Grounds for Building Orientation Mapping and Validation of Noise Level Correlation Modeling on Aircraft Take-off and Landing

“…The symptoms occur due to the water vaporization which contributes noise wave absorption in the air (see Figures 11 and 12). Similar to the temperature influence to the noise pressure level, in the Relative Humidity effect to noise, it is found that the L0 is very high and over than the treeshold [7]. It is indicates that the aircraft noise is such a comprehensive noise and disturb with its low and high frequencies [36].…”

“…This procedure did not use frequency analyzer, due to the aim for obtaining the noise exposure on human impairement. Although this method is still polemic in several studies [7,36,37], the rest of the studies have shown that this method is a simple way for observing the outdoor noise: = 10 1 10 .…”

“…A is amplitude, π/ω is constant, α is orientation angle in ( • ), and π * (α − α c )/ω is phase. The high L 0 in the Table 12 indicates noise disturbance on low frequencies [7,36,37]. The determinant correlation coefficient (R 2 ) are quite high at 0.54 and 0.58 during take-off and landing respectively because temperature is main variable on accelerating the noise wave variable in the air (see Figures 9 and 10).…”

“…Building orientation without considering environmental acoustics causes a high level of sound received and it could disturb human life [4]. Occupants would be annoyed by the aircraft noise because, based on the regulation and findings of research, the quality standard of noise level on dwelling is 55 dB(A) [4][5][6], 30 dB(A) inside a dwelling at night [7], 50 dB(A) and 40 dB(A) in open window dwelling during daytime and night, respectively [7]. This study focused not only on how the building should be placed on term of orientation toward the runway, but also to what extent the validation of correlation modeling between the orientation angles and noise level received by occupants could be established.…”

Analysis of Resilient Design by Thermoacoustic Adaptation of Tropical Urban Model

“…These are as a guideline for critical health effect, speech intelligibility and with moderate annoyance during the daytime and the evening. In fact, noise disturbance has increased hugely in the last 15-20 years (Caniato et al 2016). Even if traffic noise is generally considered as the first cause of disturbance, both for annoyance or sleep problems, in many cases the source is related to community noise such as music, people speaking or external noisy machinery.…”