You can adjust the following voice-related settings on the Talk Settings Screen.
Controls
Tap the upper left menu > talk settings
Tap the settings icon on the room Screen

Talk volume: Displays the current volume setting.
Talk determination: Reacts when a group member talks.
Voice guide: Turns the voice guide on and off during a conversation.
Enable Main Button: Turns use of the BONX earpiece's Main Button on and off.
(In situations where outside impact may affect the button, it can be useful to disable the button.)
Noise filter: Adjust the filter strength if the conversation is difficult to hear due to surrounding noise or voice quality.