Click on the chat menu in the top right corner of the screen. Click on the microphone icon to enable voice chat. Make sure your microphone is plugged in and turned on.

Turn On Voice Chat In Roblox Before you can enable voice chat in Roblox, you need to ensure that you have verified your age.

How to Enable Voice Chat and Call Someone in Roblox Unfortunately, Roblox Connect isn’t available to everyone due to an age limit. You not only need to be at least 13 years of age, but your ...

That indicates that that user is also using voice chat. Note that even if your account is already age-verified, you'll have to manually enable Spatial Voice Chat, as it is disabled by default.

According to TechCrunch, Roblox will first roll out the feature to 5,000 developers above the age of 13. The company may never provide voice chat for children on the platform.