Haptic Noise Reduction in Mobile Audio Subsystems
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Solution Overview
Problem
Haptic noise generated by information handling systems, such as mobile devices, interferes with audio communications by being picked up by microphones, leading to poor user experience and reduced communication quality.
Innovation Solution
A haptic noise reduction system that processes digital representations of sound input to subtract haptic noise frequencies and amplitudes from the audio stream, using models or experimentation to characterize and eliminate haptic noise, thereby isolating and removing the noise from the audio input without the need for separate noise-cancelling devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If haptic feedback is generated by the information handling system, then user experience is enhanced, but haptic noise is picked up by microphones and interferes with audio communications
Solution Approach 1:
The audio signal processing is segmented into multiple frequency bands using a bank of bandpass filters. Each filter processes a specific frequency range, allowing the system to identify and remove haptic noise frequencies while preserving other audio components. This segmentation enables targeted noise removal without affecting the overall audio quality or haptic feedback functionality.
Solution Approach 2:
The patent extracts and removes specific haptic noise frequency components from the audio signal. By identifying the characteristic frequencies of haptic motor noise and selectively eliminating these frequency components through filtering, the system removes the harmful noise while maintaining the useful audio signal and haptic feedback operations.
2Object-affected harmful factors
If noise-cancelling devices are used to reduce haptic noise, then audio communication quality improves, but device complexity increases
Solution Approach 1:
The audio processing subsystem is made multi-functional by enabling it to perform both standard audio processing and haptic noise cancellation using the same hardware resources. The existing audio processing pipeline is enhanced with additional filtering capabilities that leverage the same processors and audio interfaces, eliminating the need for separate dedicated noise-cancelling hardware.
Solution Approach 2:
The system uses its own audio processing subsystem to identify and remove haptic noise generated by its internal haptic motors. Rather than requiring external or separate noise-cancelling devices, the system serves itself by processing its own noise through software-based frequency analysis and filtering within the existing audio pipeline.
Data Source
AI summary
An information handling system has a haptic generation module to generate haptic effects including haptic noise and a haptic noise reduction module. The haptic noise reduction module receives characteristics of sound representative of haptic noise generated by a haptic generation module of a device and entering an audio input module of the device, the characteristics including frequencies and timing. It also detects the generation of haptic effects, the generations occurring after the receiving characteristics. It also reduces the effects of haptic noise on digital data representing audio input to the device based upon the received characteristics of the sound. It may reduce the effects by subtracting amplitudes of audio waves representing the haptic noise from amplitudes of audio waves representing the audio input.