New Delhi, March 3 -- Daily routines often unfold in crowded streets, public transport, offices and gyms. In such spaces, staying focused during a call or while listening to music can be difficult. Noise-cancelling earphones aim to reduce background sound so users can hear clearly without raising the volume or holding a phone all the time. Most models also support hands-free calls and voice commands, making them suitable for travel and work.

Active Noise Cancellation (ANC) uses small microphones placed on the earbuds to detect surrounding sound. The system then creates sound waves that are opposite to the unwanted noise. When these waves meet, they reduce the external sound before it reaches the ear. This method works alongside passive i...