Which statements are generally correct in standard tuning-fork beat problems?

Select all that apply

• Option A

  Filing the prongs generally increases the natural frequency of a tuning fork.

• Option B

  Loading the prongs with wax generally decreases the natural frequency.

• Option C

  If an unknown fork lies below a standard frequency, slight filing can reduce the beat frequency.

• Option D

  If an unknown fork lies above a standard frequency, adding wax can reduce the beat frequency.