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  1. Audio / Video ; Online: We must learn more about the transmission of COVID-19 via speech droplets

    Christina Bax / Valentyn Stadnytskyi / Philip Anfinrud / Ad Bax

    2020  

    Abstract: Video clips acquired while speaking with and without a face ... ...

    Abstract Video clips acquired while speaking with and without a face mask
    Keywords COVID-19 ; covid19
    Language English
    Publishing date 2020-03-29
    Publishing country eu
    Document type Audio / Video ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  2. Article ; Online: Could SARS-CoV-2 be transmitted via speech droplets?

    Philip Anfinrud / Christina E Bax / Valentyn Stadnytskyi / Adriaan Bax

    Abstract: Speaking may be a primary mode of transmission of SARS-CoV-2. Considering that reports of asymptomatic transmission account for 50-80% of COVID-19 cases and that saliva has peak viral loads at time of patient presentation, droplet emission while speaking ...

    Abstract Speaking may be a primary mode of transmission of SARS-CoV-2. Considering that reports of asymptomatic transmission account for 50-80% of COVID-19 cases and that saliva has peak viral loads at time of patient presentation, droplet emission while speaking could be a significant factor driving transmission and warrants further study. We used a planar beam of laser light passing through a dust-free enclosure to detect saliva droplets emitted while speaking. We found that saying the words 'Stay Healthy' generates thousands of droplets that are otherwise invisible to the naked eye. A damp homemade cloth face mask dramatically reduced droplet excretion, with none of the spoken words causing a droplet rise above the background. Our preliminary findings have important implications for pandemic mitigation efforts.
    Keywords covid19
    Publisher medrxiv
    Document type Article ; Online
    DOI 10.1101/2020.04.02.20051177
    Database COVID19

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  3. Audio / Video ; Online: The airborne lifetime of small speech droplets and their potential importance to SARS-CoV-2 transmission

    Valentyn Stadnytskyi / Philip Anfinrud / Christina E. Bax / Adriaan Bax

    2020  

    Abstract: Movies that show the experimental setup and the full 85-minute observation of speech droplet nuclei. The full movie recording of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of ... ...

    Abstract Movies that show the experimental setup and the full 85-minute observation of speech droplet nuclei. The full movie recording of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of regular droplets, also many thousands of micro-droplets per second. This movie clip shows the decay of airborne particles. Note: some parts of the audio of the clips were muted for privacy.
    Keywords covid-19 ; speech droplet ; independent action hypothesis ; respiratory disease ; disease transmission ; covid19
    Language English
    Publishing date 2020-04-10
    Publishing country eu
    Document type Audio / Video ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  4. Audio / Video ; Online: The airborne lifetime of small speech droplets and their potential importance to transmissibility of COVID-19

    Valentyn Stadnytskyi / Philip Anfinrud / Christina E. Bax / Adriaan Bax

    2020  

    Abstract: A video clip of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of regular droplets, also many thousands of micro-droplets per second. This movie clip shows the decay of airborne ... ...

    Abstract A video clip of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of regular droplets, also many thousands of micro-droplets per second. This movie clip shows the decay of airborne particles. Note: some parts of the audio of the clip were muted for privacy.
    Keywords covid-19 ; speech droplet ; independent action hypothesis ; respiratory disease ; disease transmission ; covid19
    Language English
    Publishing date 2020-04-10
    Publishing country eu
    Document type Audio / Video ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Audio / Video ; Online: SARS-CoV-2 transmission via speech-generated respiratory droplets

    Valentyn Stadnytskyi / Philip Anfinrud / Christina E. Bax / Adriaan Bax

    2020  

    Abstract: The physics of generating acoustic waves involves the high-speed passage of air pressurized by the lungs through narrow passages, past the mucosal epithelial layers of the vibrating vocal folds. Sounds are further modulated by the passage of this air ... ...

    Abstract The physics of generating acoustic waves involves the high-speed passage of air pressurized by the lungs through narrow passages, past the mucosal epithelial layers of the vibrating vocal folds. Sounds are further modulated by the passage of this air through narrow passages between the tongue, lips, and teeth, dislodging oral fluid at all of these locations. Generation of droplets is inevitably linked to the physics of speech generation, and not limited to one person as is highlighted in a short video recording
    Keywords covid-19 ; speech droplet ; aerosols ; independent action hypothesis ; respiratory disease ; disease transmission ; covid19
    Language English
    Publishing date 2020-07-08
    Publishing country eu
    Document type Audio / Video ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  6. Audio / Video ; Online: SARS-CoV-2 transmission via speech-generated respiratory droplets

    Valentyn Stadnytskyi / Philip Anfinrud / Christina E. Bax / Adriaan Bax

    2020  

    Abstract: The physics of generating acoustic waves involves the high-speed passage of air pressurized by the lungs through narrow passages, past the mucosal epithelial layers of the vibrating vocal folds. Sounds are further modulated by the passage of this air ... ...

    Abstract The physics of generating acoustic waves involves the high-speed passage of air pressurized by the lungs through narrow passages, past the mucosal epithelial layers of the vibrating vocal folds. Sounds are further modulated by the passage of this air through narrow passages between the tongue, lips, and teeth, dislodging oral fluid at all of these locations. Generation of droplets is inevitably linked to the physics of speech generation, and not limited to one person as is highlighted in a short video recording Note: Codec issues on Windows computer The spit_happens_videoclip.mp4 uploaded in this version has non-standard coded and cannot be played on the standard installation of Windows computer. You can use VLC player or check the .mp4 video clip in version 3 of this publication or you can use the direct link https://zenodo.org/record/4021033/files/spit_happens_videoclip.mp4
    Keywords covid-19 ; speech droplet ; aerosols ; independent action hypothesis ; respiratory disease ; disease transmission ; covid19
    Subject code 410
    Language English
    Publishing date 2020-07-08
    Publishing country eu
    Document type Audio / Video ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  7. Audio / Video ; Online: The airborne lifetime of small speech droplets and their potential importance to transmissibility of COVID-19

    Valentyn Stadnytskyi / Philip Anfinrud / Christina E. Bax / Adriaan Bax

    2020  

    Abstract: A video clip of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of regular droplets, also many thousands of micro-droplets per second. This movie clip shows the decay of airborne ... ...

    Abstract A video clip of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of regular droplets, also many thousands of micro-droplets per second. This movie clip shows the decay of airborne particles. Note: some parts of the audio of the clip were muted for privacy.
    Keywords covid-19 ; speech droplet ; independent action hypothesis ; respiratory disease ; disease transmission ; covid19
    Language English
    Publishing date 2020-04-10
    Publishing country eu
    Document type Audio / Video ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  8. Audio / Video ; Online: The airborne lifetime of small speech droplets and their potential importance to transmissibility of COVID-19

    Valentyn Stadnytskyi / Philip Anfinrud / Christina E. Bax / Adriaan Bax

    2020  

    Abstract: A video clip of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of regular droplets, also many thousands of micro-droplets per second. This movie clip shows the decay of airborne ... ...

    Abstract A video clip of highly sensitive laser light scattering observations that indicate loud-speaking generates, in addition to hundreds of regular droplets, also many thousands of micro-droplets per second. This movie clip shows the decay of airborne particles. Note: some parts of the audio of the clipss were muted for privacy.
    Keywords covid-19 ; speech droplet ; independent action hypothesis ; respiratory disease ; disease transmission ; covid19
    Language English
    Publishing date 2020-04-10
    Publishing country eu
    Document type Audio / Video ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  9. Audio / Video ; Online: Is SARS-CoV-2 transmitted by speaking?

    Christina E. Bax / Valentyn Stadnytskyi / Philip Anfinrud / Adriaan Bax

    2020  

    Abstract: Laser light scattering of speech droplets. The video recorded at 24 frames per second with an iPhone11 Pro camera. The speaker’s mouth is positioned behind two parallel sheets of planar green laser light, with optical power of ca 2 W per sheet. Speech ... ...

    Abstract Laser light scattering of speech droplets. The video recorded at 24 frames per second with an iPhone11 Pro camera. The speaker’s mouth is positioned behind two parallel sheets of planar green laser light, with optical power of ca 2 W per sheet. Speech droplets crossing the two planes scatter light, as seen in the image. A comparison of recordings with and without a double layer of paper towel shows the effectiveness of a simple barrier in blocking emission.
    Keywords COVID-19 ; covid19
    Language English
    Publishing date 2020-04-11
    Publishing country eu
    Document type Audio / Video ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  10. Audio / Video ; Online: Whistling past the graveyard!

    Valentyn Stadnytskyi / Philip Anfinrud / Christina E. Bax / Adriaan Bax

    2020  

    Abstract: The physics of generating acoustic waves involves the high-speed passage of air pressurized by the lungs through narrow passages, past the mucosal epithelial layers of the vibrating vocal folds. Sounds are further modulated by the passage of this air ... ...

    Abstract The physics of generating acoustic waves involves the high-speed passage of air pressurized by the lungs through narrow passages, past the mucosal epithelial layers of the vibrating vocal folds. Sounds are further modulated by the passage of this air through narrow passages between the tongue, lips, and teeth, dislodging oral fluid at all of these locations. Generation of droplets is inevitably linked to the physics of speech generation, and not limited to one person and is highlighted the short video recording
    Keywords covid-19 ; speech droplet ; aerosols ; independent action hypothesis ; respiratory disease ; disease transmission ; covid19
    Language English
    Publishing date 2020-07-08
    Publishing country eu
    Document type Audio / Video ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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