If you are talking on a cell phone in your office, then you can keep your conversation secret by using the recently designed electronic mask.
This higher quality mask will absorb the sound and it will keep your conversation secret from the person sitting beside you. The mask uses Bluetooth to connect your phone while you can easily hear sound through its headphones.
During a private conversation, you can put this mask on your face while your voice will be absorbed by its soft pads. Your own voice will be concealed with the music that will be played from outside area of this mask.
You can fold this mask around your mask and its name is “hush me”. Your lips will be hidden by magnets present on both of its corners. It is quite uncomfortable to talk like that but the benefits of this device can only be told by people who require this mask for their private conversation.