Image-Based System for Particle Counting and Sizing

Cheng, Chen-Yu; Atkinson, Joseph F.; VanBenschoten, John E.; Bursik, Marcus; DePinto, Joseph V.

doi:10.1061/(asce)0733-9372(2000)126:3(258)

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…Size and number of particles can only be estimated, because of the background concentration of particles in the room and some drops can only be picked up in a blurred way. Cheng et al 21 measured particles of the sizes 1, 10, and 100 µm with PIV and high accuracy was shown for particles greater than 6 µm. This may be a reason why investigations of the size distribution of droplets with PIV led to significantly higher mean particle diameters 22 .…”

Section: Discussionmentioning

confidence: 99%

Aerosol emission in professional singing of classical music

Mürbe

Kriegel

Lange

et al. 2021

Sci Rep

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In this study, emission rates of aerosols emitted by professional singers were measured with a laser particle counter under cleanroom conditions. The emission rates during singing varied between 753 and 6093 particles/sec with a median of 1537 particles/sec. Emission rates for singing were compared with data for breathing and speaking. Significantly higher emission rates were found for singing. The emission enhancements between singing and speaking were between 4.0 and 99.5 with a median of 17.4, largely due to higher sound pressure levels when singing. Further, significant effects of vocal loudness were found, whereas there were no significant differences between the investigated voice classifications. The present study supports the efforts to improve the risk management in cases of possible aerogenic virus transmission, especially for choir singing.

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Section: Discussionmentioning

confidence: 99%

Aerosol emission in professional singing of classical music

Mürbe

Kriegel

Lange

et al. 2021

Sci Rep

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show abstract

“…For example, Cheng et al (2000) used PIV to count polystyrene spherical particles and measure their size and shape uniformity, which facilitate aggregation modeling. For example, Cheng et al (2000) used PIV to count polystyrene spherical particles and measure their size and shape uniformity, which facilitate aggregation modeling.…”

Section: Imaging Techniques In Geoenvironmental Studiesmentioning

confidence: 99%