Effect of ceiling and dry-type double floor on heavy-weight floor impact sound in concrete building and CLT building.

2021 ◽  
Vol 263 (3) ◽  
pp. 3064-3072
Author(s):  
Takashi Yamauchi ◽  
Atsuo Hiramitsu ◽  
Susumu Hirakawa
Keyword(s):  
Frequency Band ◽  
Sound Level ◽  
Center Frequency ◽  
Sound Insulation ◽  
Octave Band ◽  
Band Center ◽  
Heavy Weight ◽  
Concrete Building ◽  
Floor Structure ◽  
Insulation Performance

The air layer between the interior finishes and the structure is used as piping and wiring space. In many cases, ceilings and dry-type double floors are commonly constructed in Japan. However, the effect of the air layer of ceilings and dry-type double floors on the heavy-weight floor impact sound insulation performance has not yet quantitatively investigated. Therefore, in this study, the same floor and ceiling structures were constructed for concrete and CLT buildings, and the heavy-weight floor impact sound was investigated. As results, it was confirmed that the reduction amount of the heavy-weight floor impact sound by the ceiling tended to be smaller in CLT buildings than in concrete buildings. However, the trends were similar. Due to the dry-type double floor structure, the heavy-weight floor impact sound level was increased in concrete building and decreased in CLT building at 63 Hz in the octave band center frequency band. Therefore, it can be said that the dry-type double floor structure can be used to improve the heavy-weight floor impact sound performance in the CLT building.

Countermeasures against floor impact sound by heavy impact source of a box floor structure in a reinforced concrete wall construction testing device

2021 ◽  
Vol 263 (5) ◽  
pp. 1396-1404
Author(s):  
Ryuta Tomita ◽  
Kyoko Abe
Keyword(s):  
Reinforced Concrete ◽  
Sound Level ◽  
Sound Insulation ◽  
Testing Device ◽  
Concrete Wall ◽  
Heavy Weight ◽  
Floor Structure ◽  
Reinforced Concrete Wall ◽  
Wall Construction ◽  
Bare Surface

We have performed experimental examinations for the purpose of proposing a floor finishing structure with superior effects in terms of combating heavy-weight floor impact sound. We have developed a box floor with ease of construction and excellent heavy-weight floor impact sound insulation performance and examined its effect with a 1200 × 1200 mm test piece connected to inter-noise 2020. The box floor has a floor finishing structure with anti-vibration and sound insulation measures aimed at improving measures against heavy-weight floor impact sound. We herein report the results of a basic examination on the reduction of the transmitted heavy-weight floor impact sound of a box floor structure in a reinforced concrete wall construction testing device when the area is further expanded to about 10 . As a result, with the air layer under the box floor open, the floor impact sound level was reduced by 9 dB in the 63-Hz band compared to the bare surface. In addition, with the air layer at the bottom of the BOX floor sealed, the floor impact sound level was reduced by 5 dB in the 63-Hz band compared to the bare surface.

Changes in Floor Impact Sound Insulation Performance with Time

2015 ◽  
Vol 752-753 ◽  
pp. 698-701
Author(s):  
Kyoung Woo Kim ◽  
Jun Oh Yeon ◽  
Kwan Seop Yang
Keyword(s):  
Physical Characteristic ◽  
Dynamic Stiffness ◽  
Vibration Reduction ◽  
Sound Insulation ◽  
Degree Of Reduction ◽  
Floor Structure ◽  
Reduction Effect ◽  
Sound Reduction ◽  
Insulation Performance

Floating floor structures installed with resilient materials are commonly used to reduce sound from floor impacts. Resilient materials minimize the transmission of vibrations by absorbing shock vibrations occurring on the upper part. The floor impact sound reduction performance of resilient materials is related to the dynamic stiffness, which is a physical characteristic of materials. However, the dynamic stiffness varies according to the increase in the loading time of the load that is installed on the upper part of resilient materials. The dynamic stiffness values increase with an increase in the loading time; an increased dynamic stiffness value decreases the vibration reduction effect. The present study focuses on a floor structure installed with resilient materials, and identifies the degree of reduction in floor impact sound insulation performance with the elapse of time. The insulation of sound from lightweight impact sound decreased with the elapse of time, whereas the heavyweight impact sound did not show significant changes.

Impact sound transmission: experiments of control at the receiver room

2021 ◽  
Vol 263 (1) ◽  
pp. 5595-5599
Author(s):  
Davi Akkerman ◽  
Paola Weitbrecht ◽  
Mariana Shieko ◽  
Marcel Borin ◽  
Leonardo Jacomussi
Keyword(s):  
Social Housing ◽  
Sound Transmission ◽  
Field Tests ◽  
Sound Level ◽  
Sound Insulation ◽  
Total Cost ◽  
Acoustic Performance ◽  
The Impact ◽  
Insulation Performance

Considering Impact sound level requirements accomplishment in Brazil, floating floors are still considered as an inviable solution for building companies due to the implications in the total cost of building, mainly for social housing. Alternative and sometimes cheaper solutions are those undertaken in the receiver room. However, the lack of laboratory and field tests on the acoustic performance of this type of system is still a barrier for acoustic designing in Brazil. The aim of this paper is to study and validate different constructive solutions developed jointly with building companies for improving the impact sound insulation performance on the receiving room of new Brazilian housing constructions.

Research on Impact Sound Insulation Performance of Timber Floor Structure

2021 ◽  
Author(s):  
Y. W. Ding ◽  
X. Y. Zhao ◽  
Z. Wang ◽  
M. M. Li ◽  
U. Sayed ◽  
...  
Keyword(s):  
Sound Insulation ◽  
Floor Structure ◽  
Insulation Performance

Analysis of the Airborne Sound Insulation Performance of Floor Structures Based on the Intensity Method

2015 ◽  
Vol 752-753 ◽  
pp. 796-799
Author(s):  
Jun Oh Yeon ◽  
Kyoung Woo Kim ◽  
Kwan Seop Yang ◽  
Myung Jun Kim
Keyword(s):  
Sound Insulation ◽  
Frame Structures ◽  
Living Room ◽  
Structural Elements ◽  
Airborne Sound ◽  
Intensity Measurements ◽  
Floor Structure ◽  
Specific Frequency ◽  
High Level ◽  
Insulation Performance

Apartment buildings are constructed using box frame structures that integrate slabs and wall frames, and vibrations can easily travel through these integrated box frame structures. On the other hand, such a framed structure generates fewer gaps between structural elements, assuring a superior insulation performance of airborne sound compared to wooden houses. Vertically installed equipment running through different floor levels can serve as a transmission route for airborne sound of specific frequency bands. In this study, we sought to develop technical methods to improve the inter-floor airborne sound insulation performance. To this end, we measured the sound insulation performance of floor structures and intensity levels in noise penetration areas. The sound insulation performance of the living room floor structure was measured to exceed 51 dB, which was superior to that of the restroom floor by 2–7 dB. Intensity measurements identified the central and corner areas of the living room as high-level noise areas.

Sound attenuation and audibility of fire alarm signal in Korean residential apartment buildings: A case study

2017 ◽  
Vol 27 (5) ◽  
pp. 690-705
Author(s):  
Min-Joo Lee ◽  
Myung-Jun Kim
Keyword(s):  
Residential Buildings ◽  
Field Measurements ◽  
Sound Level ◽  
Sound Attenuation ◽  
Sound Insulation ◽  
Sound Sources ◽  
Fire Alarm ◽  
Apartment Buildings ◽  
Closed Door ◽  
Insulation Performance

With a view to preventing casualties due to fire outbreaks in residential buildings, we investigated the sound attenuation of audible fire-alarm signals in Korean residential apartment buildings and determine an acoustic condition for enhancing the audibility of such signals. Two sets of field measurements were performed, along with theoretical predictions using sound analysis software. In the first set of measurements, in 17 dwelling units, the standardized alarm sound level requirement of 75 dBA could not be achieved in bedrooms with existing alarm devices. In the second set of measurements, with an additional five dwelling units, both the sound attenuation according to the distance between sound sources and bedrooms and the sound insulation performance of bedroom doors were examined. The sound attenuation levels were increased by 0.72 ( R2 = 0.7982) and 0.48 ( R2 = 0.3001) dB m−1 under open- and closed-door conditions, respectively. Further, the bedroom-door sound insulation performance was in the 18- to 23-dB range. Consequently, we have demonstrated that the sound power of a general residential fire alarm must be 98–107.9 dB, depending on the dwelling-unit size and floor-plan type, in order to achieve a bedroom audibility level of 75 dBA.

Effect of Acoustic Pads' Different Dynamic Stiffness on the Reduction of Impact Sound Level

2014 ◽  
Vol 899 ◽  
pp. 491-494 ◽  
Author(s):  
Lenka Autratová ◽  
Petr Hlavsa
Keyword(s):  
Optimal Design ◽  
Transmission Loss ◽  
Dynamic Stiffness ◽  
Sound Level ◽  
Sound Insulation ◽  
Sound Transmission Loss ◽  
Acoustic Insulation ◽  
Impact Noise ◽  
Floor Structure ◽  
The Impact

Impact sound transmission loss is the ability of structure to absorb impact noise, which is formed by mechanical impulses (steps, falls). The impact noise is then spread to the elements connected to the floor structure, such as the ceiling and surrounding wall. Dynamic stiffness is one of the important parameters that affect the sound insulation of ceiling structures with floating floors. The article deals with the optimal design of acoustic insulation to the floor composition, combining different materials of various thicknesses with various characteristic properties.

A Simplified Method for Field Measurement of Airborne Sound and Impact Sound Insulation in Buildings

1994 ◽  
Vol 1 (2) ◽  
pp. 137-149
Author(s):  
Liang Min ◽  
W.U. Dasheng ◽  
Zhang Xiying
Keyword(s):  
Field Measurement ◽  
Noise Source ◽  
Sound Level ◽  
Test Method ◽  
Sound Insulation ◽  
Octave Band ◽  
Level Measurement ◽  
Impact Noise ◽  
Simplified Method ◽  
Short Test

A simplified method is investigated to be developed for use by building control inspectors or persons undertaking a similar role to allow a fast and simple check to be carried out on both air-borne and impact sound insulation between rooms. This paper proposes a short test method, in which a standard impact noise source is employed as a simplified source and one third octave band sound level measurement is simplified by A-weighting.

Sign in / Sign up

Export Citation Format

Share Document