olemus
kõnesignaali spektrogramm
Wiktionary:
a spectrogram of a person's voice

näiteid
https://i.ytimg.com/vi/NP_2yJ7nzOA/maxresdefault.jpg
http://farm5.static.flickr.com/4054/4680043107_37be2e40be.jpg

rakendusi
https://lhham.com.sg/Cyber%20Security/IAM/Lin-Hsin-Hsin-IAM-Biometrics-Voice.html
https://www.mdpi.com/1424-8220/20/18/5022/pdf
https://annals-csis.org/Volume_11/drp/pdf/182.pdf

vt ka
- häälejälg
- sonogramm (2)
- sonogramm (3)