Assertion: speaker's size | /r/CapableOf | provide transforming function
Facets:
value: over a range of frequencies
type: OTHER
value: properly
type: MANNER
Source sentences:
text: The size of the throat, mouth, the length of the horn, as well as the area expansion rate along it must be carefully chosen to match the drive to properly provide this transforming function over a range of frequencies (every horn performs poorly outside its acoustic limits, at both high and low frequencies).