Eargo‘s patent involves methods and systems for signal processing in hearing devices to detect and remove feedback. By estimating metrics based on subband signals, the adaptive feedback canceler can effectively identify feedback path changes. This innovation enhances the performance of hearing aids for users. GlobalData’s report on Eargo gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Eargo, Adaptive beamforming hearing aids was a key innovation area identified from patents. Eargo's grant share as of May 2024 was 29%. Grant share is based on the ratio of number of grants to total number of patents.
Adaptive feedback cancellation in hearing devices
A recently granted patent (Publication Number: US12010486B2) outlines a method for signal processing in a hearing device to detect feedback path changes. The method involves detecting tonal signals due to feedback onset by estimating a product of subband error and output signals, then calculating a metric based on this estimation. Feedback path changes are identified when the metric surpasses a predetermined threshold value. The patent also details the estimation of fast and slow metrics, with adaptation rates applied based on the difference between these metrics.
Furthermore, the patent describes a method for controlling an adaptive feedback canceler in a hearing device to remove feedback. By detecting tonal signals caused by feedback path changes and estimating metrics based on these calculations, the adaptive rate applied to the canceler is determined. Different adaptation rates are applied depending on whether the tonal signal is attributed to feedback path changes or not. The processor in the hearing device plays a crucial role in these operations, estimating product signals and adjusting adaptation rates accordingly based on the calculated metrics.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
