Factors influencing low-frequency noise reduction in typical Chinese dwelling layouts

Abstract

Existing approaches to reducing the low-frequency noise exposure of dwellings are not always sufficient. This study investigated the significance of dwelling layout design for low-frequency noise control. The sound distribution in six typical Chinese dwelling layouts was analysed using in-situ measurements under steady-state noise of various low frequencies. The results showed that among two-bedroom dwelling layouts, the overall average noise reduction varied considerably (6 dB). The noise reduction for room levels (number of rooms sound crosses) 1–2 and 2–3 varies by 5 and 3 dB, respectively, and the noise reduction at door openings varies by 5 dB. A model to approximate the low-frequency noise reduction of a layout was developed using the polyline distance from the noise source and the number of walls the polyline has to cross, which were clearly shown to influence low-frequency noise reduction and seem to be the strongest investigated factors.

Effects of the absorber location on low-frequency noise control in typical dwelling layouts

“…Analogous to the relations between the electric circuit elements, room connections are defined as series, parallel, and series-parallel [19]. One hundred twenty-three typical layouts of modern Chinese dwellings were summarised as the population; among them, 50 layouts were selected by simple random sampling with replacement [35,36].…”

“…Tang et al indicated that the arrangement of partition walls affects the surface absorption of rooms and the noise attenuation of windows [18]. This theory was supported by Song and Kang, who inferred that a 'parallel connection' between rooms might ensure a higher lowfrequency attenuation [19]. Therefore, the required safe distance could be reduced, thus, saving land resources.…”

“…The aim of this research was to investigate the noise reduction for different room connection Yang Song & Jian Kang: Applied Acoustics doi:10.1016/j.apacoust.2021.108465 types of dwelling layouts with different absorption levels and location, and suggest the optimal cases, considering the lack of studies on the performance of the low-frequency sound absorption in multi-room systems. In-situ measurement of 'series', 'parallel', and 'series-parallel' room connections were carried out [19]. The effects of the rooms with absorber, absorption area, and absorption area distribution proportion between two rooms on the absorber noise reduction and the standard deviation of the sound pressure level in dwelling layouts were investigated at low frequencies.…”

Assessment of adequacy of single number quantities for wall insulation performance based on the Zwicker’s loudness of transmitted indoor noise

“…2 In this context, several authors have investigated acoustic comfort in residential buildings, for example, in Norway, 3 or comfort in timber-based buildings in Sweden 4 and several researchers investigated the effect of low frequencies on dwellers. 5,6 Many reports from consulting companies and published scientific studies [7][8][9][10][11][12][13][14][15][16][17][18] have shown that even if the requirements on sound insulation defined through R w are fulfilled, good acoustic comfort in dwellings is not guaranteed. One of the drawbacks of R w is that it does not take into account noise components below 100 Hz.…”

The optimal placement of piezoelectric actuator and sensor for active structural noise control of plates

“…With the gradual improvement of people's demand for equipment performance and quality of life, the noise problem has increasingly become the object of attention and research. However, the commonly used passive vibration and noise reduction strategies often fail to control the low-frequency noise (low frequency refers to the frequency below 200 Hz, because this frequency is very common in life [1]) in some * Author to whom any correspondence should be addressed. occasions, coupled with the emergence of intelligent material, the Active Structure Acoustic Control (ASAC) technology has become the supplement and substitution of passive noise control in the low-frequency part [2,3], and the proper arrangement of actuators and sensors can better control the transmission and radiation of noise.…”