3.5-mm Jack Interface Lets Smart ANC Headsets Fly Battery Free

ams AG
March 14, 2017

The company’s latest technology breakthrough enables active noise-cancelling (ANC) headsets with a four-pole 3.5-mm jack to operate without a dedicated battery. Invented by ams, the Accessory Communication Interface (ACI) uses the microphone (MIC) wire – one of four wires in a standard 3.5mm audio cable – to carry power and bidirectional data with a rate of up to 16 Mbit/sec, as well as digital audio signals. By eliminating the headset’s battery, manufacturers can significantly reduce the size, weight and bill-of-materials cost of their connected accessory. The 3.5-mm audio solution reportedly consumes 60% less power and requires fewer components than USB Type-C systems. In addition, the system is compatible with legacy headsets that do not have ACI technology. For more technical information and sample requests, go to  

ams USA Inc.
Raleigh, NC


Company ams AG
Country Austria
Phone 43 3136 500 32110