### Answer
It appears you're experiencing issues with microphone recognition on different browsers, specifically Google Chrome and Arc, despite having allowed microphone access. This could be related to how the browsers handle permissions or specific settings that might be blocking the microphone from functioning correctly. Here are a few steps you can try:
1. Check Browser Permissions: Ensure that microphone permissions are not only allowed but also set as the default for the website or application you are using.
2. Clear Cache and Cookies: Sometimes, clearing your browser's cache and cookies can resolve unexpected behavior with hardware permissions.
3. Test Microphone in System Settings: Verify that your microphone is functioning correctly outside of the browser by using it in other applications or your system's sound settings.
4. Try a Different Browser: As you've already done, testing across different browsers is good. Consider also testing in browsers like Firefox or Safari to see if the issue persists.
5. Update Browsers: Ensure that your browsers are updated to the latest version, as updates often fix bugs related to hardware compatibility.
6. Restart Your Computer: Sometimes, a simple restart can resolve hardware recognition issues.
If the issue continues, it might be beneficial to check the developer console in the browsers for any errors that could give more insight into what might be going wrong. These steps are general advice for troubleshooting browser-related microphone issues and are not directly from Vapi's documentation but are standard practices for dealing with such issues.