Assertion: sound wave's frequency | /r/HasProperty | 60 hz
Facets:
value: in north america
type: LOCATION
value: between the tones
type: LOCATION
value: above the european frequency
type: OTHER
Source sentences:
text: In Europe, Africa, Australia, Southern South America, most of Asia, and Russia, the frequency of the alternating current in household electrical outlets is 50 Hz (close to the tone G), whereas in North America and Northern South America, the frequency of the alternating current in household electrical outlets is 60 Hz (between the tones B♭ and B; that is, a minor third above the European frequency).