Question about Samsung Ms23k3515as/Sw

Yes, according to the manual German page 19
Press the Child Lock and STOP/ECO buttons simultaneously.
No signal tones are emitted when a function is terminated

I have not tried this out myself. According to the text, the signal tones are switched off when a function is ended.
I have not checked whether the tones are then also switched off when setting.

Good question - the tone is really borderline....