Impact of vibro-isolation of technical equipment on structure-borne noise in living areas

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F19%3A10243154" target="_blank" >RIV/61989100:27230/19:10243154 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Impact of vibro-isolation of technical equipment on structure-borne noise in living areas

Popis výsledku v původním jazyce

Structure-borne low-frequency noise in buildings is generated by domestic technological equipment such as fans, pumps, compressors that are not well vibration isolated. Well-designed vibration isolation of vibrating sources can effectively reduce the transmission of energy into surrounding structures and acoustically protected spaces. The low-frequency noise even in far enclosed spaces can increase the sound pressure level (annoying noise) due to standing waves. The energy of the low-frequency waves can have a negative effect on humans, especially in the immediate vicinity of the sources. The effects of low-frequency noise energy on the residents are manifested as head pressure, irritability, migraine, fatigue, awaking, insomnia, stress, depression. The present paper investigates the conditions for reducing the transmission of structure-borne sound from vibration sources of the technological equipment of buildings into residential areas where this noise was manifested as audible tone components of 36 Hz and 49 Hz with values up to 32 dB higher than the background in the protected rooms. The solution is based on the theoretical knowledge and methodology of the transmission of vibro-sound energy and measurement of vibration in rooms and along the path of transmission, as well as on sound measurements which were also performed. For the sound and vibration measurements the FFT analysis was used. The transmission loss of building technological equipment isolators was measured and the results were compared with the theory. Finally, this paper suggests some effective measures which can have impact on the reduction of the unwanted vibro-sound energy and on the health of the people and environment (C) Proceedings of the 26th International Congress on Sound and Vibration, ICSV 2019. All rights reserved.

Název v anglickém jazyce

Impact of vibro-isolation of technical equipment on structure-borne noise in living areas

Popis výsledku anglicky

Structure-borne low-frequency noise in buildings is generated by domestic technological equipment such as fans, pumps, compressors that are not well vibration isolated. Well-designed vibration isolation of vibrating sources can effectively reduce the transmission of energy into surrounding structures and acoustically protected spaces. The low-frequency noise even in far enclosed spaces can increase the sound pressure level (annoying noise) due to standing waves. The energy of the low-frequency waves can have a negative effect on humans, especially in the immediate vicinity of the sources. The effects of low-frequency noise energy on the residents are manifested as head pressure, irritability, migraine, fatigue, awaking, insomnia, stress, depression. The present paper investigates the conditions for reducing the transmission of structure-borne sound from vibration sources of the technological equipment of buildings into residential areas where this noise was manifested as audible tone components of 36 Hz and 49 Hz with values up to 32 dB higher than the background in the protected rooms. The solution is based on the theoretical knowledge and methodology of the transmission of vibro-sound energy and measurement of vibration in rooms and along the path of transmission, as well as on sound measurements which were also performed. For the sound and vibration measurements the FFT analysis was used. The transmission loss of building technological equipment isolators was measured and the results were compared with the theory. Finally, this paper suggests some effective measures which can have impact on the reduction of the unwanted vibro-sound energy and on the health of the people and environment (C) Proceedings of the 26th International Congress on Sound and Vibration, ICSV 2019. All rights reserved.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/EF16_019%2F0000867" target="_blank" >EF16_019/0000867: Centrum výzkumu pokročilých mechatronických systémů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

ICSV 2019 : 26th International Congress on Sound and Vibration : 7-11 July 2019, Montréal

ISBN

978-1-9991810-0-0

ISSN

2329-3675

e-ISSN

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Počet stran výsledku

4

Strana od-do

1-4

Název nakladatele

International Institute of Acoustics and Vibration

Místo vydání

Auburn

Místo konání akce

Montréal

Datum konání akce

7. 7. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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