At the heart of the reference design is a unique adaptive leakage compensation technology running on ams’ AS3460 digital audio processor to dynamically adjust the frequency coverage and depth of noise attenuation and cancel out noise which enters the ear directly, bypassing the earbud’s silicone tip. This means that users who find loose-fit earbuds more comfortable to wear for long periods can enjoy the same noise cancellation performance as that of closed-fit earbuds, which plug the ear tightly to provide a physical barrier to ambient noise.
The Digital Augmented Hearing engine on which the AS3460 is based also provides a platform for new functions which make the earbud a core component of digital consumers’ lives, including personal health monitoring, selective sound awareness, and treatment for the symptoms of tinnitus. The AS3460 is the first audio chip to provide up to 40dB of noise attenuation in the loose-fit type of wireless earbud over a broad range of audible frequencies, providing a quiet acoustic background in almost any environment. In the Earbud Innovation Demo Kit, ams also provides the AS3460’s Automatic Preset Selection technology, which detects different acoustic environments such as the interior of a car, an air plane cabin, or a crowded room, and automatically applies an optimized noise filter without the user having to do anything – and without compromising safety or comfort as the user moves from one place to another.
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