Assertion: headphone's microphone | /r/HasProperty | installed in housing
Facets:
value: to receive ambient noise components
type: PURPOSE
Source sentences:
text: The noise-canceling headphones are equipped with: a microphone installed in a housing to receive ambient noise components generated around the headphones; and noise-reducing circuitry to generate signals with the opposite polarity of the ambient noise components, combine the opposite-polarity signals with audio signals, and output the combined signals through speakers.