To talk call sap in the can than that! You should not speak loud because it is interfering with the others. If you speak softly, my friend did not hear the talk trail chat may be ทก็. For example, fekbuk-line, etc.
In a telephone conversation in the public that day. You should not speak loudly It will disturb others If you speak softly, then I do not hear. May change the way people chat face was like Boots or offline.
In talking phone in public that you shouldn't speak loudly because it will disturb others. If say softly, and didn't hear you. May be a talk on the chat, such as perfect Boog line.