How does euphony know that acoustic-data-communication has started?

[happy-refactoring]

In the case of voice recognition,
Commands are recognized after walking up the AI assistant with Hey Siri, Hey Google, Hi bixby, etc.

In the case of euphony, I know that this role is known by looking at a specific frequency.

What exactly is the specific frequency in hz?

[sunyeongan]

17619

[nodobi]

17814

[jiwon0829]

17948

[phj0407]

17980

[phj0407]

17988

[zion830]

18827

[hyunjung-choi]

17890

[jiwon0829]

17900

[serim53]

17920

[jiwon0829]

17930

[Kimhaedam]

In the case of voice recognition, Commands are recognized after walking up the AI assistant with Hey Siri, Hey Google, Hi bixby, etc.

In the case of euphony, I know that this role is known by looking at a specific frequency.

What exactly is the specific frequency in hz?

17591

[DahyeonWoo]

17915

[serim53]

17916

[kldaji]

17924

[serim53]

17914

[jiwon0829]

17914

[yoouyoou]

17928