Chrome / Edge:

1. Click the lock icon 🔒 in the address bar
2. Find "Microphone" and set to "Allow"
3. Refresh the page

Safari:

1. Go to Safari → Settings → Websites → Microphone
2. Find this site and select "Allow"
3. Refresh the page

Firefox:

1. Click the lock icon 🔒 in the address bar
2. Click "Connection secure" → "More information"
3. Go to Permissions → Use the Microphone → Allow

Mobile:

1. Check your phone Settings → Apps → Browser → Permissions
2. Enable Microphone access for your browser