Demonstration of sound power determination using sound intensity measurements

1985 ◽  
Vol 77 (S1) ◽  
pp. S77-S77
Author(s):  
J. Pope ◽  
G. Rasmussen
Keyword(s):  
Sound Intensity ◽  
Sound Power ◽  
Intensity Measurements

Uncertainty of sound power measurements of a reference sound source using the AHRI Standard 230 sound intensity method

2021 ◽  
Vol 263 (6) ◽  
pp. 641-647
Author(s):  
Curtis Eichelberger ◽  
Paul Bauch
Keyword(s):  
Training Program ◽  
Sound Source ◽  
Measurement Method ◽  
Sound Intensity ◽  
Intensity Measurement ◽  
Sound Power ◽  
Sound Sources ◽  
Scanning Method ◽  
Intensity Measurements ◽  
Power Measurements

The uncertainty of determining the sound power of HVAC equipment using the AHRI Standard 230 sound intensity measurement method is presented. Measurements of six different reference sound sources (RSS) at four different laboratories, by nineteen different individuals with four different instrumentation systems are presented. From 2004 through 2020, these measurements were performed as part of a training program at Johnson Controls HVAC test laboratories to qualify technicians and engineers on the use of sound intensity instrumentation. The results illustrate the reproducibility of sound intensity measurements using the scanning method of AHRI Standard 230.

Robotic Arm for Automatic Sound Intensity Measurements

2016 ◽  
Author(s):  
Paul Kalbfleisch ◽  
Taeho Kim ◽  
Monika Ivantysynova
Keyword(s):  
Sound Intensity ◽  
Automatic Measurement ◽  
Measurement Procedure ◽  
Robotic Arm ◽  
Sound Power ◽  
Positive Displacement ◽  
Intensity Measurements ◽  
Successful Design ◽  
Specific Implementation

The characterization of the noise emitted by positive displacement machines serves as an important metric for the design of positive displacement machines and their corresponding systems. One method of characterizing the noise produced by positive displacement machines utilizes the two microphone-intensity probes at various locations surrounding the unit to approximate the total sound power generated by the machine in question. This paper proposes a method of utilizing a robotic arm to perform automatic sound intensity measurements (ASIM). This paper will explain the various theoretical motivations and justifications for the basic design concept as well as the specific implementation. All the necessary theoretical considerations and technical difficulties were accounted for in the successful design and manufacturing of an ASIM robot. To highlight the usefulness of the automatic measurement procedure, three case studies was performed to evaluate the robotic ASIM’s ability to measure sound power. A total of 1086 measurement locations were taken in order for each grid study to quantify the convergence of the field non-uniformity.

Schlieren optical filtering for sound‐intensity measurements

1980 ◽  
Vol 67 (6) ◽  
pp. 2106-2107
Author(s):  
L. Carpenedo ◽  
P. Ciuti ◽  
G. Iernetti
Keyword(s):  
Sound Intensity ◽  
Optical Filtering ◽  
Intensity Measurements
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