SRD:Sonic Resistance

Sonic Resistance: A suit of armor or a shield with this property normally has a glistening appearance. The armor absorbs the first 10 points of sonic damage per attack that the wearer would normally take (similar to the resist energy spell).

Faint abjuration; CL 3rd; Craft Magic Arms and Armor, resist energy; Price +18,000 gp.

Sonic Resistance, Improved: As sonic resistance, except it absorbs the first 20 points of sonic damage per attack.

Moderate abjuration; CL 7th; Craft Magic Arms and Armor, resist energy; Price +42,000 gp.

Sonic Resistance, Greater: As sonic resistance, except it absorbs the first 30 points of sonic damage per attack.

Moderate abjuration; CL 11th; Craft Magic Arms and Armor, resist energy; Price +66,000 gp.