Question

Which among the following provides the procedure of active suppression?

(a) Filter with cut off frequencies

(b) Emission of sound to cancel noise

(c) Emission of sound to shape noise

(d) Extraction of noise sample

The question was posed to me during an interview.

My doubt stems from Next Generation Wireless Network topic in section Next Generation Wireless Network of Cognitive Radio

Answer 1

The correct answer is (b) Emission of sound to cancel noise

To explain: Active noise suppression mitigates the noise experienced by a user by producing a sound to compensate for the undesired noise field. It can reduce the damage inflicted by exposure to high noise levels and reduce the Lombard effect.