Investigating the acoustic performance of flexible elastomeric foam insulation in dealing with impact noise

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کد مقاله : 1044-ISAV2023 (R2)
نویسندگان
Linkran industrial group
چکیده
In recent years, significant attention has been devoted to a critical architectural concern, namely, the mitigation of impact noise transmission within building structures. This sound is transmitted to the whole building through the skeleton and is spread in the space by the vibrating surfaces of the building. Particularly in multi-story buildings, the transfer of knocking sound (e.g., noise by walking) from one floor to another significantly impacts the comfort of the building's occupants. Consequently, measures must be taken to minimize the transmission of percussive sounds from the ceiling, effectively enhancing the ceiling's soundproofing capabilities. Therefore, in this research, elastomeric insulation with a closed cell structure with simple roll shapes and egg crate patterns has been used to implement the floating floor. This approach aimed to effectively control and reduce noise resulting from impact events across various frequencies. Based on the investigations, the value of ΔLW coefficient for insulation cut in the shape of an egg crate patterns with a thickness of 12 mm and simple roll insulation with a thickness of 19 mm is 20 and 22, respectively. These findings underscore the efficacy of both insulation types in significantly reducing impact noise. It's important to note that the performance coefficient of elastomeric egg crate insulation exceeded expectations relative to its thickness.
کلیدواژه ها
موضوعات
 
Title
Investigating the acoustic performance of flexible elastomeric foam insulation in dealing with impact noise
Authors
Abstract
In recent years, significant attention has been devoted to a critical architectural concern, namely, the mitigation of impact noise transmission within building structures. This sound is transmitted to the whole building through the skeleton and is spread in the space by the vibrating surfaces of the building. Particularly in multi-story buildings, the transfer of knocking sound (e.g., noise by walking) from one floor to another significantly impacts the comfort of the building's occupants. Consequently, measures must be taken to minimize the transmission of percussive sounds from the ceiling, effectively enhancing the ceiling's soundproofing capabilities. Therefore, in this research, elastomeric insulation with a closed cell structure with simple roll shapes and egg crate patterns has been used to implement the floating floor. This approach aimed to effectively control and reduce noise resulting from impact events across various frequencies. Based on the investigations, the value of ΔLW coefficient for insulation cut in the shape of an egg crate patterns with a thickness of 12 mm and simple roll insulation with a thickness of 19 mm is 20 and 22, respectively. These findings underscore the efficacy of both insulation types in significantly reducing impact noise. It's important to note that the performance coefficient of elastomeric egg crate insulation exceeded expectations relative to its thickness.
Keywords
Elastomeric insulation, Impact noise, Frequency, Closed cell foam
مراجع

1. P. Nassiri, A. Koohpaei, H. Zeraati, PJ. Shalkouhi. " Evaluation of exposure to whole-body
vibration and its health effects on train operators in Tehran-Andimeshk line, Iran ", Journal
of low frequency noise, vibration and active control. 285–294 (2010).
2. T. Mizoue, T. Miyamoto, T. Shimizu. " Combined effect of smoking and occupational exposure to noise on hearing loss in steel factory workers". Occupational and environmental medicine. 56–59 (2003).
3. R. Hajizadeh, A. Kavanin, A. Jonidi Jafari, M. Barmar, S. Farhang Dehghan " Investigation
of Acoustic Properties of Polymer Nanocomposites Polymer Regarding Combined Sound
Absorption and Insulation Characteristics", Journal of Health and safety, 324–328 (2019).
4. I. Alimohamadi, R. Soltani, M. Azkhosh, M. Gohari, B. Moosavi. " Study of role extroversion of caused by traffic noise on mental function of the students". Iran Occupational Health.
80–86 (2011).
5. ISIRI 8568-6 Acoustics - Measurement of sound insulation in buildings and of building elements Part 6: Laboratory measurements of impact sound insulation of flooors ", Institute of
Standards and Industrial Research of Iran (2005).
6. ISO 140-6 " Acoustics - Measurement of sound insulation in buildings and of building elements - Part 6: Laboratory measurements of impact sound insulation of floors", International
Standard (1978).
7. ISIRI 8834-2 " Acoustics - Rating of sound insulation in buildings and of building elements -
Part 2: Airborne sound insulation", Institute of Standards and Industrial Research of Iran
(2018).
8. ISO 717-2 " Acoustics — Rating of sound insulation in buildings and of building elements
— Part 2: Impact sound insulation", International Standard (2020).