The Latest in Wireless Earbuds and Hearables Innovations in audioXpress April 2025

audioXpress April 2025 is now available and includes a comprehensive Market Update on Wireless Earbuds and Hearables, covering AI, Sensors, how Wi-Fi streaming is possible in headphones, and more. René Christensen explains Expansion Techniques for Acoustical Engineering, Ethan Winer writes about Built-In Guitar Effects, and Vincent Thiernesse shares his incredible single control Low-Frequency Hybrid Crossover. Don't miss also Paul Marchese's Primer on Class-D Amplifiers, and Richard Honeycutt's article on Silvertone guitar amp circuits.

Azoteq recently expanded its offering to the TWS market with the release of the IQS323. The IQS323 offers capacitive and inductive sensing as user interface and in-ear-detection, whilst the IQS7222A IC is a multifunctional capacitive, inductive, and Hall-effect sensor with additional temperature sensing for reference tracking. The IQS7222A is offered in a 1.62 x 1.62mm WLCSP and allows you to add a touch-and-swipe interface, wear detection, docking detection and your choice of an inductive waterproof button or the inductive force-sensing features.

Azoteq recently released its second-generation four-in-one chip for earbuds. The IQS7222A IC is a multifunctional capacitive, inductive, and Hall-effect sensor with additional temperature sensing for reference tracking. The 1.62 x 1.62 mm chip allows you to add a touch-and-swipe interface, wear detection, docking detection and your choice of an inductive waterproof button or the inductive force-sensing features.