Effect of different types of ceilings on floor impact sound insulation performance in CLT model building

The floor impact noise generated in a building often causes problems among residents. The floor impact sound insulation performance of timber construction buildings is lower than that of concrete construction. However, due to the large supply of wood and the stress-relieving effects of wood, the use of wood is being promoted around the world. In Japan, the Act on the Promotion of the Utilization of Wood in Public Buildings was enforced to promote the use of CLT (Cross Laminated Timber) for the effective use of wood. We have been experimentally investigating the effect of floor finish structure in CLT model building. In this paper, we report the measurement results of the change in floor impact sound insulation performance when the suspended ceiling structure was changed. As results, it was confirmed that the effect of the sound-absorbing material in the ceiling cavity and the effect of the double-layer ceiling board were effective. In addition, it was clarified that the dry-type double floor structure with rubber vibration insulator on its legs is an effective floor finish structure for improvement of heavy and light weight floor impact sound insulation performances.

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EXPERIMENTAL RESEARCH OF IMPACT NOISE STRUCTURE FLOORS WITH CHANGING THICKNESS OF MATERIALS AND SIZE FILLER

Modern technology materials and design in construction ◽

10.31649/2311-1429-2021-1-6-11 ◽

2021 ◽

Vol 30 (1) ◽

pp. 6-11

Author(s):

I. Babii ◽

◽

L. Kucherenko ◽

Ye. Kalchenia ◽

◽

...

Keyword(s):

Experimental Research ◽

Experimental Studies ◽

Expanded Polystyrene ◽

Sound Insulation ◽

Material Thickness ◽

Impact Noise ◽

Noise Structure ◽

Impact Protection ◽

Insulation Performance

This paper considers experimental studies of the sound insulation structure of the floor to determine the effect of material thickness, polystyrene concrete and cement-sand screed, as well as the size of the aggregate (polystyrene granules) in polystyrene concrete on the sound insulation properties of floor construction, namely impact protection. It was determined that the thickness of the cement-sand screed in no way affects the improvement of impact noise. Due to the reduction of the size of the aggregate (expanded polystyrene granule) in polystyrene concrete, it was possible to reduce the thickness of the structure, which did not affect the insulation performance of impact noise.

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Theoretical Study of Sound Insulation Simulations (About Attaching Effect of Sound Absorbing Material and Consideration of Sound Insulation Performance by Height of Origami Core)

10.1115/detc2021-68851 ◽

2021 ◽

Author(s):

Aya Abe ◽

Haruki Yashiro ◽

Ichiro Hagiwara

Keyword(s):

Aspect Ratio ◽

Flat Plate ◽

High Aspect Ratio ◽

Theoretical Method ◽

Sound Insulation ◽

Truss Core ◽

Multi Stage ◽

Absorbing Material ◽

Insulation Performance ◽

Press Molding

Abstract We have developed a new truss core panel by origami forming to get the higher aspect ratio than that by multi-stage press molding. Our object is to apply the new origami truss core to the train floor. Whether or not this goal can be achieved depends on whether this new origami truss core with a high aspect ratio has excellent sound insulation characteristics. Therefore, as a development of the analysis technology by FEM which accurately estimates the sound insulation characteristics, at first, the relation between the aspect ratio and the sound insulation performance is discussed in the flat plate with one core. So far, sound insulation simulations using FEM did not match with theory of the mass law. However, this can be achieved by setting the end of the transmitted side to be a nonreflective boundary. In this paper, to generalize this method, it is determined theoretically that the sound pressures from the FEM can be separated accurately into the sound pressures of the forward and backward waves from Helmholtz’s equation. Then, the sound insulation characteristics of a flat plate obtained using the proposed theoretical method and the conventional method are compared while assuming that the flat plate is a rigid body. In addition, the validity of the proposed method is confirmed by evaluating the effect of attaching a sound absorbing material to the plate. Furthermore, application of the proposed method to a flat plate with a truss core and an examination of whether a high aspect ratio is advantageous for sound insulation are also presented.

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Study of various wood stud partitions with various gypsum board and proprietary acoustical sound insulation products

INTER-NOISE and NOISE-CON Congress and Conference Proceedings ◽

10.3397/in-2021-3307 ◽

2021 ◽

Vol 263 (1) ◽

pp. 5838-5846

Author(s):

Kristin Salenger

Keyword(s):

Sound Insulation ◽

Gypsum Board ◽

Measurement Results ◽

Insulation Performance ◽

The U.S ◽

Better Than

Wood stud construction is common in residential and hospitality buildings in some parts of the U.S.; however, there is a deficiency of field-tested sound insulation performance of partitions constructed with wood studs that are spaced closer than 16" on center. This study presents the sound isolation measurement results of a set of fifteen partitions within an existing facility that has been experiencing repeated complaints of poor acoustic privacy between horizontally adjacent spaces. The tested partition types varied between single stud, double stud, and single studs with resilient channel constructions. The walls had four materials of varying combinations applied, including 19/32" OSB, Type X gypsum board, proprietary enhanced gypsum board, and proprietary mass loaded vinyl. It was shown that the partition with enhanced gypsum board performed better than the same partition with Type X, the double stud partition performed lower than expected, and the addition of mass loaded vinyl to both double and single stud partitions did not affect the ASTC rating, among other findings.

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Impact Sound Insulation Concept for Lightweight Timber Floor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.855.245 ◽

2013 ◽

Vol 855 ◽

pp. 245-251 ◽

Cited By ~ 2

Author(s):

Juraj Medveď ◽

Bart Ingeleare ◽

Lieven de Geetere

Keyword(s):

Low Cost ◽

Previous Article ◽

Sound Insulation ◽

Building Research ◽

Timber Frame ◽

Laboratory Conditions ◽

Building Research Institute ◽

Impact Noise ◽

Frame Construction ◽

Insulation Performance

This paper is the second continuation of lightweight timber frame floor construction investigation with a respect to impact noise isolation. We will log on to previous article which dealt with mockup investigation of new LWTF floor conception. The main objectives of research is to design lightweight floor with good impact sound insulation performance to achieve low cost and reduce thickness of construction. In the following chapters well outline results of new floor model on lightweight timber frame construction implemented in laboratory conditions in Belgian Building Research Institute in Limelette, Belgium.

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APPLICATION OF THE METHOD SPRINGY DEFORMATIONS OF BARREL DURING SHOT FOR DETERMINING THE INITIAL VELOCITY OF THE SHELL (MINE)

Collection of scientific works of Odesa Military Academy ◽

10.37129/2313-7509.2019.12.1.75-80 ◽

2019 ◽

Vol 1 (12) ◽

pp. 75-80

Author(s):

Ye. Didenko ◽

O. Stepanenko

Keyword(s):

Strain Gauge ◽

Initial Velocity ◽

Radial Direction ◽

Fire Control ◽

Automatic Control Systems ◽

Measurement Results ◽

Initial Resistance ◽

The Moment ◽

The Many ◽

Effective Use

One of the indicators of the effective use of artillery is the accuracy of the fire impact on the objects of enemy. The accuracy of the artillery is achieved by completing the implementation of all measures for the preparation of shooting and fire control. Main measures of ballistic preparation are to determine and take into account the summary deviation of the initial velocity. The existing procedure for determining the summary deviation of the initial velocity for the check (main) cannon of battery leads to accumulation of ballistic preparation errors. The supply of artillery units with means of determining the initial speed of the projectile is insufficient. Among the many known methods for measuring the initial velocity, not enough attention was paid to the methods of analyzing the processes that occur during a shot in the "charge-shell-barrel" system. Under the action of the pressure of the powder gases in the barrel channel and the forces of the interaction of the projectile with the barrel there are springy deformations in the radial direction. To measure springy deformations it is advisable to use strain gauge sensors. Monitoring of deformation in a radial direction by time can be used to determine the moment of passing a projectile past the strain gauge mounted on the outer surface of the barrel. In the case of springy deformations, the initial resistance of the sensor varies in proportion to its value. The speed of the shell (mine) in the barrel can be determined by time between pulses of signals obtained from strain gauges located at a known distance from each other. The simplicity of the proposed method for measuring the initial velocity of an artillery shell provides an opportunity for equipping each cannon (mortar) with autonomous means for measuring the initial velocity. With the simultaneous puting into action of automatic control systems can be automatically taking into account the measurement results. This will change the existing procedure for determining the total deviation of the initial velocity and improve the accuracy, timeliness and suddenness of the opening of artillery fire, which are components of its efficiency.

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Research on the Design of Sound Insulation Performance of Isolating-sound and decoupled tile Based on Local Resonance Membrane Material

Journal of Physics Conference Series ◽

10.1088/1742-6596/1750/1/012010 ◽

2021 ◽

Vol 1750 ◽

pp. 012010

Author(s):

Zongji Li ◽

Fangyong Zong ◽

Jian Zhang

Keyword(s):

Sound Insulation ◽

Membrane Material ◽

Local Resonance ◽

Insulation Performance

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Evaluation on the Airborne Sound Insulation Performance of Partition Walls between Housing Units in Modern New Han-oks

KIEAE Journal ◽

10.12813/kieae.2021.21.4.073 ◽

2021 ◽

Vol 21 (4) ◽

pp. 73-83

Author(s):

Ju-Yeob Lee

Keyword(s):

Sound Insulation ◽

Airborne Sound ◽

Partition Walls ◽

Insulation Performance ◽

Housing Units

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

INTER-NOISE and NOISE-CON Congress and Conference Proceedings ◽

10.3397/in-2021-2298 ◽

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.

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