Why does my S7 Edge S Voice keep opening while I am at my desk and the phone is locked

[AC Question]

While sitting at my desk, I have my phone next to my on a charging pad. During conference calls ,S voice initiates while I am talking on the phone (landline). The phone is locked, and I am not touching it. I did set up a password to open the phone form locked, however that work (3 syllables) has not been mentioned. today, while in a meeting with the phone in my pocket, the S voice opened during the meeting. Help?