Ampetronic and Listen Technologies' Auri Auracast solution employs Nordic's nRF5340 SoC to deliver market leading radio sensitivity and power consumption
www.nordicsemi.com, Sept. 11, 2025 –
UK-based Ampetronic and Listen Technologies have introduced what is claimed to be the first AuracastTM broadcast audio-based solution for assistive listening. Powered by Nordic Semiconductor’s dual-core nRF5340 multiprotocol SoC, ‘Auri’TM is a complete solution to allow venues and end users to adopt Auracast broadcast audio technology for assistive listening in public spaces.
The solution is comprised of the ‘Auri TX2N Transmitter’, the ‘Auri RX1 Receiver’, ‘Auri D4’ and ‘Auri D16’ docking stations, as well as ‘Auri Manager’ software. The TX2N Transmitter is a professional-grade broadcaster that accepts a variety of audio inputs to suit different venues and applications. Audio inputs can be assigned in mono or stereo to one or two channels; and venues can add more channels by connecting additional transmitters. Each nRF5340 SoC-powered transmitter broadcasts over a wide area, but if more coverage is needed, the system can be expanded by adding additional transmitters in repeater mode.
Nordic has a clear roadmap aligned with the needs of audio solutions, and the nRF5340 fits nicely into our product due to the dual core architecture which offers great versatility
Mike Cyprus, Product Manager, Ampetronic
The Auri RX1 Receiver also integrates the nRF5340 SoC, and allows end users to choose how they receive a broadcast. They can use their own Auracast-compatible device or an Auri receiver to scan for available broadcasts. Auri receivers can be programmed to support both open and encrypted broadcasts, and are powered by a rechargeable Li-ion battery that provides an ‘on time’ of greater than 24 hours, thanks in part to the ultra-low power capabilities of the Nordic SoC.
The receivers are generally held in a dedicated dock that allows the venue to charge and program the receiver for the preferred channels. The docking stations not only act as chargers, they offer network capability and can store receiver configurations plus a library of broadcast information such as Privacy Keys, enabling centralized management, programming, and configuration. The Auri Manager application is a PC/iOS application-based platform for management of the installed Auri system and its individual components. The system has an API for integration of control into third party systems. Android and iOS apps are under development.
“Auri is the first fully integrated system for assistive listening using the Bluetooth® Auracast protocol,” says Mike Cyprus, Product Manager, Ampetronic. “It delivers high quality audio, without reverberations and interferences, direct to a user via their hearing aid or a receiver, dramatically improving their ability to hear in challenging situations.
“Over the next few years, most, perhaps all new hearing aids and consumer phones will become compatible, and able to receive Auri broadcasts directly. This will greatly increase the number of people who can benefit from public assistive listening services, as well as allowing additional services such as multiple channels for language translation.”
Nordic’s nRF5340 SoC integrates powerful dual Arm® Cortex®-M33 processors; a high performance application processor capable of DSP and Floating Point (FP) with 1 MB Flash and 512 KB RAM, and a fully programmable, ultra-low power network processor with 256 KB Flash and 64 KB RAM. The dedicated application processor provides ample computational resources to ensure clear sound and stable transmission.
“Nordic has a clear roadmap aligned with the needs of audio solutions, and the nRF5340 fits nicely into our product due to the dual core architecture which offers great versatility,” continues Cyprus. “Naturally the size and price point of the device were important, but we were driven by roadmap viability rather than simply a specification or price comparison. Nordic however in our opinion offers the best technical solution, with market leading radio sensitivity and power consumption.”