Any way to turn off sound (mute) for a specified time

[Gintaras]

You can turn off the sound in Control Panel -> Sounds -> Sounds -> Windows Explorer -> Start Navigation -> None -> Apply? (and restart IE)
If yes, macro can turn off the sound in registry, with rset. The key is:
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating\.Current