Simultaneous estimation of reverberation times and their uncertainties from room impulse responses using a single‐measurement procedure

2006 ◽  
Vol 120 (5) ◽  
pp. 3223-3223
Author(s):  
Ning Xiang ◽  
Tomislav Jasa
Keyword(s):  
Measurement Procedure ◽  
Simultaneous Estimation ◽  
Impulse Responses ◽  
Single Measurement

scholarly journals How Replicates Can Inform Potential Users of a Measurement Procedure about Measurement Error: Basic Concepts and Methods

Diagnostics ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 162
Author(s):  
Werner Vach ◽  
Oke Gerke
Keyword(s):  
Measurement Error ◽  
Measurement Procedure ◽  
Statistical Methodology ◽  
Single Measurement ◽  
Conceptual Approach ◽  
Simple Manner ◽  
Scientific Investigations ◽  
Standard Procedures ◽  
Standardized Terminology ◽  
General Statistical

Measurement procedures are not error-free. Potential users of a measurement procedure need to know the expected magnitude of the measurement error in order to justify its use, in particular in health care settings. Gold standard procedures providing exact measurements for comparisons are often lacking. Consequently, scientific investigations of the measurement error are often based on using replicates. However, a standardized terminology (and partially also methodology) for such investigations is lacking. In this paper, we explain the basic conceptual approach of such investigations with minimal reference to existing terminology and describe the link to the existing general statistical methodology. This way, some of the key measures used in such investigations can be explained in a simple manner and some light can be shed on existing terminology. We encourage clearly conceptually distinguishing between investigations of the measurement error of a single measurement procedure and the comparison between different measurement procedures or observers. We also identify an unused potential for more advanced statistical analyses in scientific investigations of the measurement error.

scholarly journals Monitoring of Grouting Compactness in Tendon Duct Using Multi-Sensing Electro-Mechanical Impedance Method

2020 ◽  
Vol 10 (6) ◽  
pp. 2018 ◽  
Author(s):  
Bin Guo ◽  
Dongdong Chen ◽  
Linsheng Huo ◽  
Gangbing Song
Keyword(s):  
Lead Zirconate Titanate ◽  
Prestressed Concrete ◽  
Processing Time ◽  
Structural Integrity ◽  
Physical Property ◽  
Mechanical Impedance ◽  
Lead Zirconate ◽  
Measurement Procedure ◽  
Impedance Method ◽  
Single Measurement

The structural integrity of post-tensioning prestressed concrete structures with tendon ducts highly depends on the grouting quality in construction. This paper proposes a real-time approach to monitoring the grouting compactness in tendon ducts using the multi-sensing electro-mechanical impedance (EMI) method. When Lead Zirconate Titanate (PZT) transducers with different pre-selected dimensions are serially connected and mounted on a structure at distributed locations, each PZT provides unique resonance frequency coupled with the local structural physical property. Therefore, the impedance with multiple peaks of the serially connected multiple PZTs can be captured during a single measurement, which significantly simplifies the measurement procedure and reduces the data processing time. In addition, the wiring for the PZT sensors is also simplified. In this research, the feasibility of the proposed method was experimentally and numerically investigated to monitor the grouting compactness in a tendon duct specimen. The 3-dB mean absolute percentage deviation (MAPD) was applied to quantify the variations of the impedance signatures measured from five different grouting levels. Both experimental and numerical results verify the feasibility of using the proposed method for monitoring the grouting compactness in tendon ducts.

scholarly journals Locating Image Sources from Multiple Spatial Room Impulse Responses

2021 ◽  
Vol 11 (6) ◽  
pp. 2485
Author(s):  
Otto Puomio ◽  
Nils Meyer-Kahlen ◽  
Tapio Lokki
Keyword(s):  
Degrees Of Freedom ◽  
Coordinate Frame ◽  
Impulse Responses ◽  
Single Measurement ◽  
Six Degrees Of Freedom ◽  
Complex Spaces ◽  
Stable Direction ◽  
Starting Point ◽  
Concert Halls ◽  
Small Room

Measured spatial room impulse responses have been used to compare acoustic spaces. One way to analyze and render such responses is to apply parametric methods, yet those methods have been bound to single measurement locations. This paper introduces a method that locates image sources from spatial room impulse responses measured at multiple source and receiver positions. The method aligns the measurements to a common coordinate frame and groups stable direction-of-arrival estimates to find image source positions. The performance of the method is validated with three case studies—one small room and two concert halls. The studies show that the method is able to locate the most prominent image sources even in complex spaces, providing new insights into available Spatial Room Impulse Response (SRIR) data and a starting point for six degrees of freedom (6DoF) acoustic rendering.

Single measurement of hemoglobin predicts outcome of HCC patients

2014 ◽  
Vol 52 (01) ◽  
Author(s):  
F Finkelmeier ◽  
D Bettinger ◽  
V Köberle ◽  
M Schultheiß ◽  
B Kronenberger ◽  
...  
Keyword(s):  
Single Measurement

Reliability of a Single β-Thromboglobulin Measurement in a Diabetic Population : Importance of PGE1 in Anticoagulant Mixture

1987 ◽  
Vol 57 (02) ◽  
pp. 201-204 ◽  
Author(s):  
P Y Scarabin ◽  
L Strain ◽  
C A Ludlam ◽  
J Jones ◽  
E M Kohner
Keyword(s):  
In Vitro Release ◽  
Mean Value ◽  
Reliable Estimate ◽  
Diabetic Patients ◽  
Single Measurement ◽  
Diabetic Population ◽  
The Difference ◽  
Vitro Release

SummaryDuring the collection of samples for plasma β-thromboglobulin (β-TG) determination, it is well established that artificially high values can be observed due to in-vitro release. To estimate the reliability of a single β-TG measurement, blood samples were collected simultaneously from both arms on two separate occasions in 56 diabetic patients selected for a clinical trial. From each arm, blood was taken into two tubes containing an anticoagulant mixture with (tube A) and without (tube B) PGE!. The overall mean value of B-TG in tube B was 1.14 times higher than in tube A (p <0.01). The markedly large between-arms variation accounted for the most part of within-subject variation in both tubes and was significantly greater in tube B than in tube A. Based on the difference between B-TG values from both arms, the number of subjects with artifically high B-TG values was significantly higher in tube B than in tube A on each occasion (overall rate: 28% and 14% respectively). Estimate of between-occasions variation showed that B-TG levels were relatively stable for each subject between two occasions in each tube. It is concluded that the use of PGEi decreases falsely high B-TG levels, but a single measurement of B-TG does not provide a reliable estimate of the true B-TG value in vivo.

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