Demant has patented a binaural hearing system with two hearing aids that exchange audio signals. The system includes adaptive beamformers for spatial filtering and maintaining unit amplitude and phase for target components. The secondary beamformer estimates the target signal in the user’s environment. GlobalData’s report on Demant 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 Demant, was a key innovation area identified from patents. Demant's grant share as of February 2024 was 50%. Grant share is based on the ratio of number of grants to total number of patents.
Binaural hearing aid system with adaptive beamforming technology
A binaural hearing aid system has been granted a patent (Publication Number: US11917370B2) that comprises first and second hearing aids designed to be worn in the user's ears. The system includes antenna and transceiver circuitry for establishing a communication link between the hearing aids to exchange audio signals. Each hearing aid consists of a BTE-part with front and rear input transducers converting sound into electric signals, a primary adaptive 2-channel beamformer, and a secondary adaptive 2-channel beamformer. These beamformers maintain unit amplitude and phase for a target component of the reference input signal, providing spatially filtered signals based on specific beamformer-input signals. The secondary beamformer incorporates spatially filtered signals from the contra-lateral hearing aid via the communication link to estimate the target component of the reference input signal.
Furthermore, the binaural hearing aid system includes features such as ITE parts with ITE-input transducers, processors for adjusting gain/attenuation based on user needs, output transducers for providing sound stimuli, and minimum variance distortionless response (MVDR) beamformers. The system also implements complex weights in signal paths using sub-band analysis/synthesis filter banks, calculated based on a Generalized Sidelobe Canceller (GSC) structure. Additionally, the system can adaptively determine parameters for the beamformers from the input signals and includes multiple microphones in the BTE-part for enhanced functionality. An auxiliary device can be connected to the system for exchanging information or audio, with options like remote controls, smartphones, wearable electronic devices, and smartwatches. The method of operating the system involves utilizing the primary and secondary adaptive 2-channel beamformers in a cascaded structure to provide spatially filtered signals based on specific beamformer-input signals, ensuring an accurate estimate of the target component of the reference input signal.
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