Jezik: Angleški jezik Naslov: The Role of Sound Protection in Timber Buildings During the Construction Process: A Case Study Izvleček: In the process of building construction, the field of building and spatial acoustics is often given too little attention, which can significantly affect the quality of living and the well-being of users. The master’s thesis focuses on the issue of sound insulation in timber buildings made of cross-laminated timber (CLT), with special emphasis on the planning and implementation of acoustic solutions already at the design stage. The thesis is divided into three content-related parts. In the first part, an analysis of Slovenian and foreign legislation and recommendations in the field of building acoustics will be presented. The empirical part includes a case study of a real building – a semi-detached house with a load-bearing structure made of massive cross-laminated CLT elements. Within this framework, an analysis of the project documentation will be carried out and field measurements performed, including measurements of the airborne sound insulation of the partition wall between dwellings, the façade, and the floor construction. The measurements and equipment are in accordance with ISO 16283-1, -2 and - 3 standards. Based on the measured values of the apparent weighted sound reduction index R′w of the external separating structure with a window (32 dB), the apparent weighted sound reduction index R′w of the partition wall between dwellings (71 dB), and the measured weighted normalised impact sound pressure level of the intermediate floor L′n,w (44 dB), compliance with the applicable Slovenian and foreign criteria was assessed. The results are adequate, with the common partition wall standing out in particular, where the evaluated airborne sound insulation is R′w = 71 dB and exceeds the requirements of the technical guideline, which for buildings of the same type specifies R′w = 55 dB. This confirms high-quality design and execution of details as well as the absence of acoustic bridges. The façade with a window, where R′w = 32 dB, formally meets the minimum threshold (≥ 25 dB), but spectral analysis reveals weaker performance in the low-frequency range (~50-125 Hz; at 125 Hz ~16 dB), due to resonance of the glazing or insufficient airtight installation of the window frame. The floor slab, with L′n,w = 44 dB, meets the requirements for residential premises. Although the low-frequency part of the spectrum remains critical, which is characteristic of CLT structures, in the case under consideration and its intended use it does not represent a functional limitation.
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