olemus
kuulaja häälitsus, žest või miimika,
mis annab tagasisidet,
kõnelejat katkestamata
=
a noise, gesture, expression, or word used by a listener to indicate attention to a speaker

ülevaateid
https://en.wikipedia.org/wiki/Backchannel_(linguistics)

https://www.cs.utep.edu/nigel/bc/

https://www.thoughtco.com/back-channel-signal-communication-1689153

https://is.muni.cz/th/f75c5/Diploma.Thesis.pdf

http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.612.2846&rep=rep1&type=pdf

https://core.ac.uk/download/pdf/132421429.pdf

vt ka
- abikanal
- saalisuhtlus