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Impact of face masks on voice radiation.
Pörschmann, Christoph; Lübeck, Tim; Arend, Johannes M.
  • Pörschmann C; Institute of Communications Engineering, TH Köln-University of Applied Sciences, Betzdorfer Straße 2, 50679 Cologne, Germany.
  • Lübeck T; Institute of Communications Engineering, TH Köln-University of Applied Sciences, Betzdorfer Straße 2, 50679 Cologne, Germany.
  • Arend JM; Institute of Communications Engineering, TH Köln-University of Applied Sciences, Betzdorfer Straße 2, 50679 Cologne, Germany.
J Acoust Soc Am ; 148(6): 3663, 2020 12.
Article in English | MEDLINE | ID: covidwho-1004073
ABSTRACT
With the COVID-19 pandemic, the wearing of face masks covering mouth and nose has become ubiquitous all around the world. This study investigates the impact of typical face masks on voice radiation. To analyze the transmission loss caused by masks and the influence of masks on directivity, this study measured the full-spherical voice directivity of a dummy head with a mouth simulator covered with six masks of different types, i.e., medical masks, filtering facepiece respirator masks, and cloth face coverings. The results show a significant frequency-dependent transmission loss, which varies depending on the mask, especially above 2 kHz. Furthermore, the two facepiece respirator masks also significantly affect speech directivity, as determined by the directivity index (DI). Compared to the measurements without a mask, the DI deviates by up to 7 dB at frequencies above 3 kHz. For all other masks, the deviations are below 2 dB in all third-octave frequency bands.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Speech Acoustics / Speech Intelligibility / Voice / COVID-19 / Masks Type of study: Experimental Studies Limits: Humans Language: English Journal: J Acoust Soc Am Year: 2020 Document Type: Article Affiliation country: 10.0002853

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Speech Acoustics / Speech Intelligibility / Voice / COVID-19 / Masks Type of study: Experimental Studies Limits: Humans Language: English Journal: J Acoust Soc Am Year: 2020 Document Type: Article Affiliation country: 10.0002853