The Sonic Power Scaling Devices That Have Been Shown to Be

question 10

Multiple Choice

The sonic power scaling devices that have been shown to be as effective as hand scaling operate in the range of:

• A) 600 to 1000 hertz
• B) 3000 to 8000 hertz
• C) 9000 to 15,000 hertz
• D) 20,000 to 40,000 hertz