On Analyzing the Correlations and Implications of Single-Number Quantities for Rating Airborne Sound Insulation in the Frequency Range 50 Hz to 5 kHz

<p>The implementation of laboratory measurement of airborne sound insulation based on ISO and ASTM standards was carried out at SNSU BSN. The aim of this work to realize the measurement of airborne sound insulation for several sample tests, where the procedure of the test is performed according to the updated standard ISO 10140 and ASTM E90. Besides, the single number rating also is determined based on ISO 717-1 and ASTM E413. This measurement has been conducted in the two reverberation rooms using pressure method consist of measuring the sound pressure level, measuring the reverberation time, obtaining the sound reduction index (R) or sound transmission loss (STL), and determination of a single-number ratings of the samples test. From the results, some parameter requirements such as the frequency range and the rounding procedure of R or STL influence the measurement result slightly. Subsequently, the significant difference is obtained for the determination of single number rating in the shifting procedure of the reference curve.</p>

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AIRBORNE SOUND INSULATION IMPROVEMENT ON MASONRY PARTITIONS USING ADDITIONAL PLASTERBOARD LAYERS

Engineering Structures and Technologies ◽

10.3846/skt.2011.04 ◽

2011 ◽

Vol 3 (1) ◽

pp. 33-40 ◽

Cited By ~ 2

Author(s):

Marius Mickaitis ◽

Aleksandras Jagniatinskis ◽

Boris Fiks

Keyword(s):

Theoretical Calculations ◽

Low Frequency ◽

Masonry Wall ◽

In Situ Measurements ◽

Sound Insulation ◽

Frequency Range ◽

Airborne Sound ◽

Sound Reduction ◽

Reduction Index

For the purposes of accumulating knowledge of how to comply with requirements for new buildings of obligatory sound class C or enhanced acoustic comfort sound classes A and B (Lithuanian Building Technical regulations STR 2.01.07:2003), the article discusses improvement on airborne sound insulation of partitions between dwellings using additional plasterboard layers. The results of an empirical approach were obtained performing in situ measurements of the partitions of masonry from silicate blocks and expanded-clay concrete blocks. Theoretical calculations without the evaluation of flanking paths are added. The paper looks at the peculiarities of in situ measurement methods and the estimation of the limiting uncertainty of the sound reduction index. It is showed that the values of the in situ measurements of the airborne sound reduction index in accordance with requirements EN ISO 140 and EN ISO 717 series for rooms having volume higher than 50 m3 varies depending on frequency range. It has been stated, that improvement on the weighed airborne sound reduction index in the frequency range from 100 Hz to 3150 Hz depends on the properties of additional layers and on the characteristics of the main constructions. Resonance in the low frequency range arising due to additional layers may reduce the weighed airborne sound reduction index defined in the frequency range from 50 Hz to 3150 Hz. This fact must be taken into account when designing improvement on masonry wall insulation using an additional layer in dwellings.

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On the use of finite-element methods to minimize uncertainties in airborne sound insulation measurements in the low frequency range

The Journal of the Acoustical Society of America ◽

10.1121/1.4987683 ◽

2017 ◽

Vol 141 (5) ◽

pp. 3596-3596

Author(s):

Francesco Martellotta ◽

Ubaldo Ayr ◽

Gianluca Rospi

Keyword(s):

Finite Element ◽

Finite Element Methods ◽

Low Frequency ◽

Sound Insulation ◽

Frequency Range ◽

Airborne Sound

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A Comparative Study of Sound Transmission Loss Provided by Glass, Acrylic and Polycarbonate

Jurnal Teknologi ◽

10.11113/jt.v60.1432 ◽

2013 ◽

Vol 60 (1) ◽

Author(s):

Elwaleed Awad Khidir ◽

Zambri Harun ◽

Mohd Jailani Mohd Nor ◽

Muhamad Razi

Keyword(s):

Transmission Loss ◽

Sound Transmission ◽

Sound Insulation ◽

Sound Transmission Loss ◽

Material Density ◽

Airborne Sound ◽

Single Number ◽

Reverberation Chambers ◽

Sound Reduction ◽

Reduction Index

This article presents an assessment for the airborne sound insulation provided by single glazed panels. The glazed panels were glass, acrylic and polycarbonate with a thickness of 4 mm. The experiments were conducted in a transmission loss facility consisting of semi anechoic and reverberation chambers. The panels were subjected to airborne sound and the data collected. Glass, acrylic and polycarbonate panel absorb noise most effectively above 500 Hz with the absorption peaks at 1000 Hz. The single number sound reduction index (RW) for glass, polycarbonate and acrylic were 41 dB, 38 dB and 37 dB, respectively. This could be attributed mainly to the material density which is higher for the glass. Keywords: Sound transmission loss; glazing; insulation; weighted index

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RESULTS OF A SERIES OF ACOUSTIC MEASUREMENTS OF NOISE PENETRATING THROUGH THE PARTITION BETWEEN TWO CINEMAS

Akustika ◽

10.36336/akustika201932195 ◽

2019 ◽

Vol 32 ◽

pp. 195-200

Author(s):

Ilya Tsukernikov ◽

Alexandr Fadeev

Keyword(s):

Main Part ◽

Field Measurements ◽

Sound Insulation ◽

Acoustic Measurements ◽

Frequency Range ◽

Acoustic Parameters ◽

Regulatory Documents ◽

The Past ◽

Airborne Sound ◽

The Russian Federation

The number of cinemas has increased over the past 10 - 15 years in Russia. The main part of new cinemas is multiplex cinemas in the shopping and entertainment malls. It is mean that in multiplex two cinemas may show the movies at the same time. The problem of airborne sound isolating by a partition/slab between two multiplex cinemas halls is considered. The analysis of the regulatory and technical documents (the International Standard, and the national documents of the Russian Federation, as well as the corporative standards of international cameramen) is done. The levels of penetrating noise through a partition between two cinemas halls are measured for two cinemas. The discrepancy between the estimated sound insulation parameters and the requirements of the current regulatory documents are shown. A series of field measurements of acoustic parameters is carried out. The discrepancy of the airborne sound insulation parameters by partition is shown. The case of one-number estimation of airborne of sound isolation in the law frequency range is considered. The influence of acoustic finishing on the levels of penetrating noise from one cinema hall to another is estimated.

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