Bose has been granted a patent for a method of sound enhancement in far-field pickup using microphones. The method involves generating primary and reference beams to enhance and reject desired signals, respectively, and removing correlated components. GlobalData’s report on Bose 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 Bose, Acoustic authentication was a key innovation area identified from patents. Bose's grant share as of January 2024 was 54%. Grant share is based on the ratio of number of grants to total number of patents.
Sound enhancement in far-field pickup using microphones
A recently granted patent (Publication Number: US11889261B2) discloses a method for sound enhancement in a system with microphones for far-field pick up. The method involves generating a primary beam focused on a desired signal look direction and a reference beam to reject the desired signal, using at least two microphones. A processor then removes components correlating to the reference signal from the primary signal, enhancing the desired signal. The system includes various devices like wearable audio devices, hearing aids, speakers, smartphones, and more.
Furthermore, the method includes determining the presence of the desired signal using voice activity detector processing before generating the beams. It also allows for manual or automatic selection of the desired signal look direction. Additionally, the system can generate multiple beams focused on different directions to aid in selecting the primary beam. The patent also covers the use of acoustic echo cancellation to remove system audio from the signals and adaptive filtering techniques to enhance the spectral amplitude of the primary signal based on noise estimates. Overall, the patent aims to improve sound quality and beamforming in far-field environments, defining the far field as a distance of at least approximately one meter from the microphones.
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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.
