If you are using Android 12, you may need to turn on system-wide microphone access. On previous versions of Android, you do not need to turn this on.
１. Long press on the Chrome app icon and select App info.
If you are on an older Android device and cannot find the App Info button
Open up your phone Settings app. Tap on the search icon at the top left corner. Type in "Chrome" and select Chrome under App Info.
２. Select Permissions.
３. Select Microphone. Then select Allow only while using the app, or Allow if you are using a device running Android 9 and below.