In-vehicle audio device and adaptive noise suppression method

An intelligent noise reduction filter using a denoising autoencoder separates non-engine noises from engine noises using AI, enhancing ANC performance by isolating engine noises for effective cancellation in vehicle interiors.

DE102024211835A1Pending Publication Date: 2026-06-18ROBERT BOSCH GMBH
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
ROBERT BOSCH GMBH
Filing Date
2024-12-12
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

ANC systems in vehicles incorrectly interpret non-engine noises, such as driver and passenger voices, as engine noise, leading to degraded performance and unwanted noise introduction, which existing solutions like reducing convergence rate or using high-pass filters fail to adequately address.

Method used

An intelligent noise reduction filter, specifically a denoising autoencoder, is placed upstream of the ANC unit to separate non-engine noises from engine noises, using AI-based neural networks to filter out unwanted noise components before processing by the ANC unit.

Benefits of technology

This approach enhances ANC performance by isolating engine noises for effective cancellation, improving the overall noise suppression in vehicle interiors by removing non-engine noises like driver voices, tire noise, and wind noise.

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Abstract

The present invention relates to a vehicle-internal audio device (100; 100'; 100''), comprising: - at least one microphone, in particular analog or digital (10), for recording -- engine noise (220) caused by at least one engine (210) associated with the vehicle (200), in particular the drive engine, as well as -- from non-engine noise caused by at least one source other than the engine (210), in particular independent of the engine (210), especially driver and / or passenger voices, tire noise, wind noise and other ambient noise; - at least one ANC unit (40) designed for adaptive noise suppression, by means of which the engine noises (220) detected by the microphone (10) can be processed, in particular suppressed; at least one autoencoder unit (30) upstream of the ANC unit (40), by means of which the motor noises (220) can be distinguished and / or separated from the non-motor noises.
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Citation Information

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