Assertion: sound wave's frequency | /r/HasProperty | measured in hertz
Facets:
value: typically
type: DEGREE
value: after the german physicist
type: OTHER
value: often
type: TEMPORAL
Source sentences:
text: Sound frequency is often measured in "Hertz" (Hz) which is how many vibrations per second.
text: Frequency is measured in cycles per second, or Hertz, after the German physicist who experimented with sound in the 19th century.
text: The frequency f {\displaystyle f} is the number of periods per unit time (per second) and is typically measured in hertz denoted as Hz.