Assertion: tuning fork's frequency | /r/HasProperty | the same
Facets:
value: for best results
type: PURPOSE
Source sentences:
text: The frequencies of the two forks have to be the same for best results.
text: I had the experience that made me highly aware of the possibility of getting the same beat frequency from both sides, where one stationary frequency is combined with another one which is variable and sweeping across the point where both frequencies are the same.