Gauge repeatability and reproducibility study of airborne sound isolation measurements

2021 ◽  
Vol 263 (3) ◽  
pp. 3900-3908
Author(s):  
Wayland Dong ◽  
Devin Wong ◽  
John LoVerde
Keyword(s):  
Noise Reduction ◽  
Measurement Method ◽  
Measurement Standard ◽  
Components Of Variance ◽  
Uncertainty In Measurement ◽  
Apartment Buildings ◽  
Reproducibility Study ◽  
Airborne Noise ◽  
Designed Experiment ◽  
Repeatability And Reproducibility

A gauge repeatability and reproducibility study (GRR) uses analysis of variations (ANOVA) on an appropriately designed experiment to separate and quantify the components of the overall uncertainty. The authors have previously presented results of GRR studies of the measurement of airborne and impact insulation of floor-ceiling and demising wall assemblies in several apartment buildings, in which the uncertainty in the measurement method and the variability of the nominally-identical assemblies were compared. The results of two additional GRR studies on measurements of airborne noise isolation of wood stud demising walls are presented. The first study, like previous studies, evaluates the components of variance attributable to operator, repeatability, and part. The second study uses a fixed operator and part, and evaluates the variance due to loudspeaker type, position, and level on the measured noise reduction. The measurement standard (ASTM E336) gives limited guidance on the type and location of the loudspeaker used on the source side, and this study can inform whether changes in the standard with regards to the loudspeakers could reduce the uncertainty in measurement.

scholarly journals Análisis del sistema de medición en una fábrica ensambladora de electrónicos

2020 ◽  
pp. 18-26
Author(s):  
Mauricio López-Acosta ◽  
Andrea Montoya-Castro ◽  
Allán Chacara-Montes ◽  
José Manuel Velarde-Cantú
Keyword(s):  
Production Process ◽  
Measurement System ◽  
Industrial Production ◽  
Production Line ◽  
Measurement Method ◽  
Present Problem ◽  
Statistical Tools ◽  
Production Processes ◽  
Reproducibility Study ◽  
Repeatability And Reproducibility

The importance of developing statistical tools in the manufacturing labor field starts from the daily struggle of industrial production processes against variability. The analysis of the measurement system aims to assess the variability associated with the measurement method used in the production process. Considering the instrument (Gage) and the operator that performs the measurement, in order to identify if it can be considered as acceptable. The objective of the research is to evaluate the reliability of the measurement system used in the production line of electronic locks through a Gage R&R study, to reduce the number of defective parts. The production line under evaluation is dedicated to the assembly and manufacture of electronic padlocks, has three inspection stations in which a repeatability and reproducibility study is carried out to obtain as a result the percentage of accuracy associated with the performance of the machine in the measurement system and personnel. The methodology or procedure to be followed for the development of the repeatability and reproducibility study will be carried out as mentioned by Pulido (2009), in the described steps of a short and long R&R study, from which the most relevant and applicable steps were taken. according to the characteristics of the present problem. The contribution of the study is the development of an analysis of the measurement system offers the company the outline of the current situation in a quantitative and qualitative way and allows it to provide a solid basis for the recognition of improvement opportunities that can help to decrease reported defects.

scholarly journals A Repeatable and Reproducible Digital Method to Quantify the Cement Excess and Enamel Loss after Debonding Lingual Multibracket Appliance Therapy

2021 ◽  
Vol 11 (3) ◽  
pp. 1295
Author(s):  
Alba Belanche Monterde ◽  
Alberto Albaladejo Martínez ◽  
Alfonso Alvarado Lorenzo ◽  
Adrián Curto ◽  
Jorge Alonso Pérez-Barquero ◽  
...  
Keyword(s):  
Measurement Technique ◽  
Measurement Method ◽  
Dental Arch ◽  
Micro Computed Tomography ◽  
Morphometric Measurement ◽  
Before And After ◽  
Repeatability And Reproducibility ◽  
Lingual Brackets ◽  
Multibracket Appliance ◽  
Area And Volume

The aim of the present study is to present a repeatable, reproductible, and accurate morphometric measurement method for measuring and quantifying the area and volume of cement that remains after fixed lingual multibracket appliance debonding, enamel loss after fixed lingual multibracket appliance debonding, and the volume of cement used to adhere fixed lingual multibracket appliances. Ten conventional lingual brackets were cemented in 10 extracted teeth embedded into an epoxy resin model simulating a dental arch. This model was scanned before and after bonding the lingual brackets, after debonding, and after polishing the surfaces. We also performed a Micro-Computed Tomography scan of the lingual brackets used. Afterward, the standard tessellation language (STL) digital file was aligned, each tooth was segmented individually, and the file was re-aligned using engineer morphometry software. Inter-operator and intra-operator comparative analyses were performed using the ANOVA test, and the repeatability and reproducibility of the morphometric measurement technique were analyzed using Gage R&R statistical analysis. Repeatability showed 0.07% and 0.16% variability associated with the area and volume measures, respectively, while reproducibility showed 0.00% variability associated with the area and volume measures, respectively. In conclusion, the morphometric measurement technique is a repeatable, reproductible, and accurate morphometric measurement method for quantifying the area and volume of cement that remains after fixed lingual multibracket appliance debonding, enamel loss after fixed lingual multibracket appliance debonding, and the volume of cement used to adhere fixed lingual multibracket appliances.

Comparison of Noise Reduction Performance Evaluation Methods for Low-Noise Pavement in Korea- Part

2021 ◽  
Vol 263 (4) ◽  
pp. 2930-2939
Author(s):  
Byungchae Kim ◽  
Hyunjin Kim ◽  
Wonuk Kang
Keyword(s):  
Noise Reduction ◽  
Noise Level ◽  
Measurement Method ◽  
Road Traffic ◽  
Low Noise ◽  
Management Standards ◽  
Close Proximity ◽  
Porous Pavement ◽  
Reduction Effect ◽  
Measurement Location

In Korea, road noise is assessed as a measurement method of exterior noise emitted by road vehicle for management standards by the National Institute of Environmental Sciences. In this method, the noise felt at the actual pickup point is measured as LAeq (the roadside equivalent noise level). Recently, to clarify the standard for measuring noise on low-noise pavements, the CPX (ISO11819-2; Close-proximity method) was first introduced in the Porous Pavement Guidelines of the Ministry of Land, Infrastructure and Transport. According to ISO, the CPX adopts the side microphone as a mandatory measurement location, and the rear optional. The side location has been a mandatory due to its high correlation with SPB (ISO 11819-1, Statistical Pass-by method). However, according to our previous study on the correlation evaluation between L and CPX rear microphone noise level, both noise reduction effect was about 9-12 dB(A) showed a high correlation in Korea where heavy road traffic is common. The following study aims to show the consistent correlation between the L and CPX rear noise level. Furthermore, it is intended to be helpful in selecting the location of the CPX microphone that can most effectively represent the actual noise on the low-noise pavement in Korea.

scholarly journals Assessment of the Adequacy of Gauge Repeatability and Reproducibility Study Using a Monte Carlo Simulation

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Chunghun Ha ◽  
David S. Kim ◽  
SeJoon Park
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
System Analysis ◽  
Performance Metrics ◽  
Repeated Measurements ◽  
Percentage Error ◽  
Nested Design ◽  
Reproducibility Study ◽  
Measurement System Analysis ◽  
Repeatability And Reproducibility

ANOVA gauge repeatability and reproducibility study is the most popular tool for measurement system analysis. Two experimental designs can be applied depending on the durability of the objects. If repeated measurements are possible or sufficient homogeneous nonrepeatable samples are available, crossed design is appropriate; otherwise, nested design should be used. In this paper, we investigated the adequacy of ANOVA gauge repeatability and reproducibility study from the perspective of practitioners. We proposed a Monte Carlo simulation that is close to the realistic procedure to evaluate the adequacy of both structures. During the evaluation, we considered the average performance metrics, percentage of correct decision, histogram shape, and symmetric mean absolute percentage error for the four popular performance metrics, namely, % Study Variation, % Contribution, % Tolerance, and the number of distinct categories. The experimental results show that the nested design fails to judge the precision of the gauge while the crossed design succeeds.

Measuring Uncertainty Using Different Approaches: A Case Study for Acetaminophen Quantification

2016 ◽  
Vol 99 (3) ◽  
pp. 612-617 ◽  
Author(s):  
Fabiane Lacerda Francisco ◽  
Alessandro Morais Saviano ◽  
Felipe Rebello Lourenço
Keyword(s):  
Measurement Uncertainty ◽  
Uncertainty Estimation ◽  
Pharmaceutical Drug ◽  
Drug Products ◽  
Pharmaceutical Equivalence ◽  
Reproducibility Study ◽  
Repeatability And Reproducibility ◽  
Analytical Result ◽  
Measurement Uncertainty Estimation

Abstract Investigation of out-of-specification analytical results is laborious, time-consuming, and costly and must be well documented. However, an analytical result is not complete unless reported with its measurement uncertainty. Here, we compare four different approaches for measurement uncertainty estimation used in acetaminophen quantification in pharmaceutical drug products. Measurement uncertainties were estimated using a repeatability and reproducibility study, Eurachem/Citac guidelines, Monte Carlo simulations, and a spreadsheet method. These different approaches provided similar results. However, they differed by the sources of uncertainties considered, by the procedures of calculation, and by the effort required in routine applications. Nevertheless, all four approaches were successful in assessing conformity of acetaminophen content in pharmaceutical drug products and may be used in assessing pharmaceutical equivalence.

A Study on the Method of Measurement of Heavy-Weight Floor Impact Sound Considering the Room Mode in Low Frequency Ranges

2010 ◽  
Vol 20 (1) ◽  
pp. 156-161
Author(s):  
Mun-Ki Joo ◽  
Myung-Ho Han ◽  
Hey-Zoo Hwang ◽  
Yang-Ki Oh
Keyword(s):  
Measurement Method ◽  
Low Frequency ◽  
Problem Space ◽  
Heavy Weight ◽  
Apartment Buildings ◽  
Rotating Machine ◽  
Method Of Measurement ◽  
Time Average ◽  
Measurement Deviation ◽  
Standard Development

Most of receiving rooms for the measurement of floor impact sound have rectangular shapes with couple of meters of dimension, with reflective finishing, no furniture and no curtains. Modal overlaps in those conditions are the major reason for the low reproducibility, and as a matter of course, low credibility in measurement. Especially the standard sound source that is currently being used for measurement of heavy-weight floor impact sounds, would cause many social problems due to the excessive low-frequency energy created, within a range from 63 to 125 Hz, and is difficult to evaluate and measure. To solve this problem, space-time average SPL’s through combinations of rotating microphones was suggested in the preceding research. In this study, measurement method using rotating machine and fixed microphones were compared and analysed by the field measurement. The measurement method using rotating machine has good consistencies with average SPL of entire receiving room. This method is expected to reduce the measurement time and measurement deviation as well as to support building regulation/standard development in Korea for Korean apartment buildings.

scholarly journals Pembuatan Sistem Perancang Peredam Kebisingan

2020 ◽  
Vol 4 (2) ◽  
pp. 56-64
Author(s):  
Rahmat Bagus Prasetya ◽  
Sunartoto Gunadi ◽  
Erna Kusuma Wati
Keyword(s):  
Data Collection ◽  
Noise Reduction ◽  
Transmission Coefficient ◽  
Loss Factor ◽  
Measurement Method ◽  
Sound Transmission ◽  
Reduction Coefficient ◽  
Noise Measurements ◽  
At Home

One of the problems experienced by the community, whether at home or at work, was the disruption in the sense of concentration caused by noise. This study aims to measure noise as well as provide materials to reduce noise in the area. The time for data collection was one day, carried out for 4 samples of data collection based on a reference from the Ministry of Environment, no: Kep-48 / MENLH / 11/1996. The measurement method also using SNI standard number 7231 in 2009. Then based on the noise value displayed on the instrument, material recommendations will be given based on the value of Noise Reduction Coefficient (NRC), Sound Transmission Coefficient (STC) and Loss Factor. The results of noise measurements at the AT-Taqwa Mosque are 77.1 dB and the recommended material recommended by the tool is Acourete Perfowood - Acoustic Panel 881 with NRC 0.375. While the measurement at the Musholla at Pasar Minggu station is 76.8 dB and the recommended material recommended by the tool is Accourete Fiber 300 with an NRC of 0.44.

scholarly journals Effect of Non-Fulfillment of Assumptions on Gage Repeatability and Reproducibility Study Evaluation

2019 ◽  
Vol 1 (1) ◽  
pp. 472-478
Author(s):  
Pavel Klaput ◽  
David Vykydal ◽  
Jiří Plura
Keyword(s):  
Measurement System ◽  
Simulated Data ◽  
Statistical Properties ◽  
System Quality ◽  
Measurement Systems ◽  
Basic Assumptions ◽  
Reproducibility Study ◽  
Study Evaluation ◽  
Measurement Systems Analysis ◽  
Repeatability And Reproducibility

Abstract The evaluation of the measurement system quality has already become an integral part of quality planning activities in both the automotive and metallurgical industries. An important assumption for obtaining the most relia ble results is compliance with the basic assumptions for evaluating the variability of the measurement system. The main goal of this paper is to analyze, how the failure to meet the basic assumptions influences the evaluation of the measurement system's statistical properties. This goal is achieved by performing a detailed analysis of the latest developments in the field of measurement systems analysis aimed at verifying the assumptions of normality and uniformity. The evaluation of the effect of non-fulfillment of both assumptions on the values of the most important statistical properties of the measurement system is performed using simulated data. Suitable graphical tools are used for practical verification of both assumptions.

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