Alps Alpine has developed an active noise control system that reduces noise by using echo and noise cancellation adaptive filters. The system includes microphones, speakers, and sound source devices to minimize errors and output noise-canceling sound. The technology aims to enhance user experience in noisy environments. GlobalData’s report on Alps Alpine 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 Alps Alpine, Gesture-based recognition systems was a key innovation area identified from patents. Alps Alpine's grant share as of February 2024 was 51%. Grant share is based on the ratio of number of grants to total number of patents.
Active noise control system for reducing noise
A recently granted patent (Publication Number: US11922916B2) discloses an active noise control system designed to reduce noise in a specific area. The system includes a combination of microphones, speakers, and adaptive filters to effectively cancel out unwanted noise. The system comprises a first area microphone, a second area speaker, a second area microphone, a second area sound source device, adders, echo cancellation adaptive filter, noise cancellation adaptive filter, and more. The echo cancellation adaptive filter and noise cancellation adaptive filter update filter coefficients to minimize errors and effectively reduce noise in the targeted area.
Furthermore, the active noise control system described in the patent also includes additional components such as a secondary path reproduction filter, first area speaker, first area sound source device, and a fourth adder. These components work together to enhance the noise reduction capabilities of the system. The patent mentions the application of the active noise control system in an automobile, where different areas within the cabin can benefit from noise reduction. The system's ability to update filter coefficients using algorithms like Filtered-X least means squared (LMS) and least means squared (LMS) algorithms ensures efficient noise cancellation in real-time, providing a quieter and more comfortable environment for users.
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