Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flow and aerosol dispersion from wind musical instruments   In the midst of the SARS-COVID-19 pandemic, many live musical activities had
to be postponed and even cancelled to protect musicians and audience.
Orchestral ensembles face a particular challenge of contamination because they
are personnel heavy and instrumentally diverse. A chief concern is whether wind
instruments are vectors of contamination through aerosol dispersion. This
study, made possible by the participation of members of the Philadelphia
Orchestra, brings insight on the modes of production and early life of aerosols
of human origin emitted by wind instruments. We find that these instruments
produce aerosol levels that are comparable to normal speech in quantity and
size distribution. However, the exit jet flow speeds are lower than violent
expiratory events (coughing, sneezing). For most wind instruments, the flow
decays to background indoor-air levels approximately 2 m away from the
instrument's opening. Long range aerosol dispersion is thus via ambient air
currents.

10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat