Microphone Probe Construction
Microphone Probe Construction - Related Videos
08:53
The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe
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Cited by 11 •
2016
Here, we present a protocol to measure, with high spatial resolution, the unsteady surface pressure in turbulent flows. This method demonstrates the construction of a remote microphone probe (RMP) and the determination of its frequency-dependent, complex transfer function. An analytical determination of the dynamic response is presented and validated.
10:08
Construction and Setup of a Bench-scale Algal Photosynthetic Bioreactor with Temperature, Light, and pH Monitoring for Kinetic Growth Tests
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Cited by 4 •
2017
This paper describes the assembly process and operation of a bench-scale photosynthetic bioreactor that can be used, in conjunction with other methods, to estimate pertinent kinetic growth parameters. This system continuously monitors the pH, light, and temperature using sensors, a data acquisition and control unit, and open-source data acquisition software.
13:48
Design and Construction of an Urban Runoff Research Facility
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Cited by 6 •
2014
This paper describes the design, construction, and function of a 1,000 m2 facility containing 24 individual 33.6 m2 field plots equipped for measuring total runoff volumes with time and collection of runoff subsamples at selected intervals for quantification of chemical constituents in the runoff water from simulated home lawns.
05:38
Custom-made Microdialysis Probe Design
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Cited by 9 •
2015
Microdialysis is a commonly used technique in neuroscience research. Therefore commercial probes are in great demand.In this work a probe assembly is explained in detail to build a reliable, concentric, custom-made microdialysis probe for less than $10.
03:47
Implantation of a Flexible Biocompatible Probe in a Glioblastoma Mouse Model
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2025
Source: Lefevre, M. C., et al., Flexible Organic Electronic Devices for Pulsed Electric Field Therapy of Glioblastoma. J. Vis. Exp. (2022)This video demonstrates the implantation of a flexible, biocompatible probe in a glioblastoma mouse model to deliver targeted pulsed electric field therapy for neurotherapeutic applications.
FAQs
Tube length and diameter shape how acoustic pressure reaches the small microphone. Because these dimensions influence frequency response and sensitivity, they can also introduce resonance that distorts the measured sound pressure. Selecting and controlling the geometry is therefore essential when the probe must represent conditions inside a narrow cavity, duct, or machinery location accurately.
Alignment keeps the microphone, tube, or housing arranged as intended, while mechanical support helps maintain that arrangement during measurement. Sealing limits unwanted acoustic leakage and noise. Together, these construction details reduce sources of measurement error and help preserve the designed acoustic transfer path, making the resulting readings more reliable in confined-space testing.
Calibration helps account for the probe’s frequency response, sensitivity, and resonance characteristics rather than treating the assembled sensor as an ideal microphone. It provides a basis for interpreting measured sound pressure and identifying whether construction choices have altered performance. This step is especially important when results will support acoustic testing, diagnostics, or model validation.
A probe changes the measurement arrangement by placing the small microphone behind a narrow tube or specialized housing. This configuration allows sound pressure to be transferred from locations that are difficult for a conventional microphone to enter directly. The tradeoff is that tube geometry, material, sealing, and resonance must be controlled so access does not compromise acoustic accuracy.
A practical workflow begins by assembling the small microphone with the selected narrow tube or specialized housing, followed by checking alignment, mechanical support, and sealing. The completed assembly then requires calibration to characterize sensitivity, frequency response, and resonance effects. These checks connect the physical construction to the accuracy needed for the intended measurement.
The approach supports measurements in narrow cavities, ducts, machinery, and other confined spaces. Engineers can use the resulting data for acoustic testing, noise diagnostics, product development, and validation of engineering models. Its value lies in obtaining sound-pressure information from locations that would otherwise be difficult to access while retaining a controlled measurement arrangement.