Measurement uncertainty analysis of sound intensity using double-coupler calibration system

Miao, Yinxiao; Yang, Xiaowei; Zhu, Gang; Yang, Wenyi; Tian, Junhong; Dai, Yilin

doi:10.1016/j.measurement.2023.113315

Cited by 4 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With "intrinsic", we refer to the phase mismatch that the two microphones carry as a bias error and therefore is not linked to the pressure difference generated by the measurement itself. Current calibration methods are highlighted in [13][14][15][16]. This paper aims at designing a cost-effective phase calibrator to evaluate the phase mismatch between two generic class-1 microphones, not intended for intensity measurements.…”

Section: Introductionmentioning

confidence: 99%

Design of a Phase Calibrator to Evaluate Non-Matched Microphones for Intensity Probes

Russo,

Monaco,

Esposito

2023

Applied Sciences

View full text Add to dashboard Cite

Intensity measurements represent a well-established method to determine the sound power of an emitting object. The principal strength of this technique relies upon the possibility of performing the measurements in situ, with no special required conditions concerning the surrounding sound field. Commercially available sound intensity probes rely on two phase-matched microphones properly spaced concerning the desired frequency range. Given the physical and mathematical principles behind the intensity method, phase differences between the signals assume a crucial role. This report aims to study the possibility of designing a cost-effective acoustic phase calibrator to extract the intrinsic phase mismatch of standard class-1 microphones. A phase calibrator has been designed to identify phase mismatches between the microphones and provide the required corrections at specific frequencies. Numerical acoustical Finite Element Method (FEM). models of the calibrator configurations have been implemented. The results of the numerical models have lately led to three calibrator prototypes that have been produced by 3D-printing and tested. They have shown good results when compared to a commercially available and much more expensive acoustic coupler.

show abstract

Section: Introductionmentioning

confidence: 99%

Design of a Phase Calibrator to Evaluate Non-Matched Microphones for Intensity Probes

Russo,

Monaco,

Esposito

2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

Investigation into the effect of rounded building corner on wind loads of flat-roof-mounted solar arrays

Dai,

Liu,

Peng

2024

Journal of Building Engineering

View full text Add to dashboard Cite

Determination of the Sound Intensity Vector Field from Synchronized Sound Pressure Waveforms

Mickiewicz,

Raczyński

2024

Applied Sciences

View full text Add to dashboard Cite

Visualization of vector acoustic fields using sound intensity measurements is a very interesting field of acoustics and has numerous applications. Unfortunately, sound intensity measurement itself requires specialized measuring instruments (presure–presure (PP) or pressure–velocity (PU)-type probes). This article presents a simplified and low-cost method of sound intensity measurement based on sound pressure measurements made synchronously. This allows for the use of a single microphone and eliminates one of the main problems of the classical PP probe, which is the phase mismatch of two different microphones. The described method was used to visualize the vector acoustic field in front of an active loudspeaker. The results were compared qualitatively and quantitatively with measurements made with a commercial PU intensity probe. The results obtained showed that the proposed method has the same level of metrological accuracy.

show abstract

Measurement uncertainty analysis of sound intensity using double-coupler calibration system

Cited by 4 publications

References 20 publications

Design of a Phase Calibrator to Evaluate Non-Matched Microphones for Intensity Probes

Design of a Phase Calibrator to Evaluate Non-Matched Microphones for Intensity Probes

Investigation into the effect of rounded building corner on wind loads of flat-roof-mounted solar arrays

Determination of the Sound Intensity Vector Field from Synchronized Sound Pressure Waveforms

Contact Info

Product

Resources

About