Noise

Area 
Fills an area with meaningless, continuous, very loud noise. No one within this area can have a conversation or hear other sounds. Use of any IQ-based skill is either distracted (spells, for example), or at -3 (or both! GM’s choice). A Wall of Silence surrounds the affected area. Resists (and is Resisted by) Silence.

Duration: 5 seconds. 
Base cost: 4 to cast. 2 to maintain. 
Prerequisite: Wall of Silence.

Item 
An area can be permanently made noisy; the spell is on the floor or ground, and is broken if the area is torn up. Or a large rug could be enchanted for a portable noisy area.  
Energy cost to create: 100 per yard radius, but only one spell is required for  the whole area.