Possible Clues:

• Sound unit has to be in Israel after a month
• Sound from tenth ringer cut short
• Revolving light either side of black ice is sound measure
• Level of sound
• Sound level unit
• Horribly bled? Ice is a sound measure
• A measurement of sound
• Sound measure destroyed bed lice
• Sound measure of tenth Babylonian deity?
• Unit relating to sound or power measurement