Blind and Deaf combat

[Altamont Ravenard]

Other then applying both the penalties for being Deaf and Blind, would a character afflicted with both these disabilities suffer additional, "synergy" penalties when in combat?

I ask because I'm running Speaker In Dreams, and the party is considering casting Silence on the halfling fighter to combat the

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Grimlock Assassin who keeps casting Darkness on her Battle axe and thus cause much mayhem within the group

. I know a magic user could simply dispel the assassin's spell, but somehow, this possibility has eluded my angry players. The halfling would thus be deafened by the Silence and blinded by the

Spoiler

Darkness

while the

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Grimlock would be deafened and blinded by said Silence

.

From the SRD:

Blinded: The character cannot see. He takes a –2 penalty to Armor Class, loses his Dexterity bonus to AC (if any), moves at half speed, and takes a –4 penalty on Search checks and on most Strength- and Dexterity-based skill checks. All checks and activities that rely on vision (such as reading and Spot checks) automatically fail. All opponents are considered to have total concealment (50% miss chance) to the blinded character. Characters who remain blinded for a long time grow accustomed to these drawbacks and can overcome some of them.

Deafened: A deafened character cannot hear. She takes a –4 penalty on initiative checks, automatically fails Listen checks, and has a 20% chance of spell failure when casting spells with verbal components. Characters who remain deafened for a long time grow accustomed to these drawbacks and can overcome some of them.

Thanks in advance

AR

Edit (spoiler):

Spoiler

I forgot that the Grimlock is only considered "half-blind" when deaf, because it also relies on its sense of smell. The question nevertheless remains

 

[Pyrex]

There are no additional in-game penalties that need to be stacked, but for the duration of the blindness/deafness I'd move the player to a different room.

If just blind but not deaf, make him face away from the table.