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In recent years, whether it is traditional audio products such as headphones, speakers, microphones, or innovative devices such as glasses, helmets, and children's toys that expand the smart audio function, Bluetooth technology has been widely used in the audio market, providing consumers with a more free, flexible, convenient, and portable product experience.

Bluetooth technology is an open global specification for wireless data and voice communications, based on proximity wireless connection technology to establish a low-cost communication environment for fixed and mobile devices. The development of Bluetooth technology has gone through several transformative stages, and by 2020, the latest generation of Bluetooth audio technology standard - low-power audio LE Audio was released, bringing the LC3 codec and a number of new features to improve sound quality, while being able to give the future of wireless terminal audio products more possibilities.

LE Audio audio technology to drive the development of the field of hearing aid, domestic hearing aid chip iteration acceleration

The Bluetooth SIG expects that by 2028, the annual shipment of LE Audio devices will reach 1 million units. It is worth mentioning that the Bluetooth SIG said that LE Audio will have the ability to provide audio help for more than 1.5 billion hearing-impaired people. This means that the field of hearing aids will be an important development direction for audio transmission.

At present, international manufacturers occupy the hearing aid chip market, such as Qualcomm and ON Semiconductor. However, with the technical investment of domestic manufacturers, some of them have also launched self-developed hearing aid chips.

For example, Nanjing Tianyue recently launched a digital hearing aid SoC chip HA3950 integrated 2 independent audio input channels, 10-way GPIO, through the new noise reduction algorithm and WDRC dynamic compression support to restore clear sound quality. Chip built-in power management module, high-precision low dropout linear regulator, support for digital volume adjustment, mode switching, etc., ordinary wireless headset with a long press, short press, multi-strike and other functions can also be configured.

Currently, there are more and more hearing aid chip solutions to achieve the depth of integration of hearing aids and Bluetooth. The self-developed chip + Bluetooth function introduced by Nanjing Tianyue allows users to carry out audiometry and fitting directly on the mobile phone APP, which can provide diversified audio needs. In addition, when the digital signal from the mobile phone is transmitted to the hearing aid chip via Bluetooth, and then amplified by algorithm, it can get clearer sound quality effect.

In addition to Nanjing Tianyue, domestic manufacturers such as Haikatan and Jinhao Medical, which established a subsidiary company, are also developing hearing aid chips. With the introduction of LE Audio technology in the hearing aid chip, Bluetooth + hearing aid chip solution will accelerate the market recognition.