Banner Shield protects against Sonically-Charged Shriek

Currently the Warden's sonically-charged shriek fully pierces the shield. This makes sense, since the shriek can also pierce other blocks. In addition, shields have also received a cooldown from being struck by the Warden's physical attack.

I propose that a player wielding a banner shield, should be able to protect against the sonic attack with the same cooldown, since a banner is formed with wool. In this case it should still pierce a regular shield as it does now.