As True Wireless Stereo (TWS) earphones become more mainstream, the consumer demands increasingly higher performance and more features, including active noise cancellation (ANC), higher-quality sound, longer battery life, and quick charging.
Balanced-armature (BA) drivers bring improved fidelity and detail over traditional dynamic drivers. BA drivers use an electronic signal to vibrate a tiny reed that’s balanced between two magnets inside a tiny enclosure. The motion of the reed is transferred to a very stiff aluminum diaphragm. This diaphragm is free of unwanted resonances in the audio band, allowing it to produce maximum clarity. The high-frequency response from BAs contributes to the loud and clear audio we hear in our on-ear monitors and hearing aids, for example.