RealMCU

Realtek Bluetooth Hearing Aids: Ultra-Low Latency, Crystal-Clear Sound Experience

A hearing aid is a small electronic device designed to help individuals with hearing loss improve their auditory experience. It receives sound through a built-in microphone and amplifies this sound with an amplifier. The enhanced sound is then transmitted into the ear. Realtek Bluetooth hearing aids have built-in AI noise reduction functionality, effectively reducing background noise and enhancing sound clarity. The ultra-low latency feature enables near-real-time audio transmission, providing users with a more natural and immediate auditory experience.

System Structure

Architecture Diagram of Hearing Aid

Realtek's RTL8773D single-chip hearing aid solution supports multiple audio input/output interfaces, including MIC, speaker, and SPI/I2S. This solution enables Bluetooth connectivity to mobile phones or other devices, supporting both high-quality Classic Bluetooth Audio and the LE Audio standard. It can efficiently receive BIS and CIS audio, offering a stable and high-quality wireless audio experience.

Application Scenario

The application of Bluetooth hearing aids in audio scenarios

Smart Sound Butler

Hearing aids can connect directly to phones, TVs, and other devices via Bluetooth, intelligently optimizing voice calls, music, and movie dialogues, precisely capturing every sound detail.

The application of Bluetooth hearing aids in daily communication scenarios

Daily Communication Assistant

Bluetooth hearing aids can clearly capture conversations and intelligently filter background noise, allowing individuals with hearing impairments to communicate more easily in daily interactions.

Advantages of Solution

Ultra-Low Latency

With an ultra-low latency of just 3 milliseconds, it delivers near real-time ambient sound effects, eliminating the sense of sound delay.

Own Voice Reduction

Reduce the prominence of individual voices to create a more balanced auditory experience, making communication clearer and more natural.

Internationally Recognized Prescription Formula Support

Supports the internationally authoritative NAL-NL2 hearing aid compensation prescription formula, enabling precise calculation and output of personalized sound compensation parameters best suited to the user's hearing condition.

Rich Peripheral Interface

Supports interfaces such as GPIO/I2C/SPI/UART/I2S/QDEC/ADC/MIC, enabling flexible peripheral connectivity for functional expansion.

Integrated Multi-Mode Bluetooth

Supports both Classic Bluetooth and Bluetooth Low Energy, compatible with LE Audio standards and Auracast broadcast audio technology, delivering versatile audio transmission through advanced wireless architecture.

Comprehensive Development Kit

A fully functional SDK development package includes hearing aid application code, mobile APP SDK, and OTA tools, reducing customer development workload and accelerating project implementation.

Recommended Hardware

Choose the SoC that suits your design requirements

	RTL8773DO-VHA-CG	RTL8773DO-CG
MCU	Cortex-M4 160MHz	Cortex-M4 160MHz
DSP-1	Hifi-Mini	Hifi-Mini
DSP-2	Hifi-4	Hifi-4
MCM Flash	16MB	16MB
A-MIC Number	4	4
D-MIC Number	6	6
ANC	Hybrid	Hybrid
Algorithm	Realtek HA Algorithm	Third Party Algorithm
Package (mm)	BGA184, 4.9x6.0	BGA184, 4.9x6.0

If you are interested in the above products, please contact our REALTEK sales or ask our customer support team for more information.