Hearable & Bluetooth LE Audio Product Development Services

Connected unicast audio

Connected unicast LE Audio allows audio streaming for voice calls as well as playback of audio media. A device may serve as a source, a sink, or both. For true wireless products, left and right devices, synchronizing their operations, have to coordinate presentation delay control, volume setting, mics and call management system.

At the time of preparing the firmware, both roles and profiles have been established. Configurable components include various profiles that ensure audio capabilities and streaming control, volume management, mics, as well as the connected coordinates.

Auracast broadcast audio

Auracast can be used to enable suitable receivers to locate and participate in the broadcasts of public announcements, shared TVs, multilingual broadcasts, assistive listening, among others. The broadcasts can either be public or protected.

The development process includes aspects like metadata, advertisement of broadcast groups and streams, synchronization, subgroup, protected broadcasts codes, and choice of receivers. Testing of the operation of the phone assistant has to be performed on the relevant devices.

LE Audio and Classic Audio coexistence

Some products still require Classic Audio for older peers. Dual-mode support affects memory, qualification, reconnection and UI complexity. A compatibility matrix covers systems, roles, codecs, calls, media, broadcasts and fallbacks.

Hardware, audio and compact PCB design

Hearables integrate RF technology, sound technology, sensors, charging technology and batteries within a small enclosure. The system on chip, codec or DSP, MEMS microphones, amplifiers, drivers, PMIC and optional sensors are selected. Each design aspect including microphone placement, venting, grounding, clocks and antenna clearance are developed collaboratively.

Our wearable PCB design and prototyping services support rigid-flex layout, antenna tuning, current measurement, design-for-test and enclosure prototypes. Seals, plastics and the wearer affect acoustics and RF, so assembled products require measurement.

LE Audio firmware and LC3 integration

Firmware handles roles, GATT services, capabilities, isochronous streams, LC3, clocks, buffering, controls, bonding, case communication, diagnostics and updates.

Our wearable firmware development team builds modular RTOS architectures and device SDKs.

The Codec parameters are a blend of sample rate, duration timing, numbers of channels, bitrate, latency, audio quality, and airtime. A buffer absorbs timing variance and doesn't add on unnecessary delays. Loss concealment and restoration are employed to avoid clicks, drift, and restarts.

Audio DSP and on-device intelligence

Processing comprises tasks such as controlling volume, performing EQ functions, using beam-forming technology, decreasing noise disturbance, canceling echoes, managing wind interference, detecting voice activity, making sidetone adjustments and setting output limits.

Local AI can identify sounds by detecting wake words or disturbing noise while not transferring the raw audio data constantly.

Algorithms are used only when there are proper reference samples, objective assessment methods and controlled listening conditions. Quiet-room testing is not sufficient for determining the efficiency of a device in noisy environments such as busy streets, windy areas and places with reverberation.

Maximizing battery performance and charging

The working timeframe is determined by the codec in use, processing volume, radio, microphones, load on DSP, volume, battery shelves, and retransmissions. Media, calls, idle time, reception, pairing, and weak link recovery are all measured.

In the case of TWS devices, battery monitoring, protection, charging policy, and connection detection are imperative. The importance of thermal operation and failure processes is crucial and is even of greater importance than the evaluation of battery nominal capacity.

Mobile app, desktop and cloud integration

Companion apps handle onboarding, equalizers, controls, fit checks, updates, broadcast assistance and diagnostics.

Our smart wearable app development services cover native and cross-platform applications, Bluetooth and cloud APIs.

Cloud features may include registration, firmware campaigns, consent, diagnostics and opt-in analytics. Audio collection requires an explicit purpose, minimization, retention and deletion policy.