Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Impact of Vocalization Loudness on COVID-19 Transmission in Indoor
  Spaces   There have been several documented outbreaks of COVID-19 associated with
vocalization, either by speech or by singing, in indoor confined spaces. Here,
we model the risk of in-room airborne disease transmission via expiratory
particle emission versus the average loudness of vocalization and for variable
room ventilation rates. The model indicates that a 6-decibel reduction in
average vocalization intensity yields a reduction in aerosol transmission
probability equivalent to doubling the room ventilation rate. The results
suggest that public health authorities should consider implementing "quiet
zones" in high-risk indoor environments, such as hospital waiting rooms or
dining facilities, to mitigate transmission of COVID-19 and other airborne
respiratory diseases.

25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con