Audio Feedback Modulation for Motion Deviation
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Solution Overview
Problem
Existing audio bio-feedback systems, which use sonification to guide kinematic motions, face challenges in being embedded within audio sources without disrupting audibility, and struggle to provide effective feedback during activities like music listening.
Innovation Solution
A system that utilizes processors, sensors, and audio effects modules to analyze motion data and adjust audio signals in real-time, applying effects such as amplitude modulation, frequency modulation, and filtering to provide feedback on kinematic, kinetic, spatial, and temporal motion performance, even when music is being listened to.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sonification is used to provide audio bio-feedback for guiding kinematic motions, then motion performance improvement is achieved, but the audio source is disrupted and audibility is affected
Solution Approach 1:
The patent combines the bio-feedback audio signal with the music audio source by merging them into a single mixed audio output. The bio-feedback signal is scaled and mixed with the music signal at appropriate volumes, allowing both the music and the motion-guiding audio cues to be heard simultaneously without one disrupting the other.
Solution Approach 2:
The patent introduces an intermediary mixing process that combines the bio-feedback audio signal with the music source. This intermediary step allows the system to integrate multiple audio sources (music and bio-feedback) into a unified output that maintains the integrity of both components while eliminating the disruption problem.
2Ease of operation
If audio effects are applied to embed bio-feedback within music signal, then audibility is maintained, but the underlying audio source may be degraded
Solution Approach 1:
The patent applies dynamic audio effects processing where the characteristics of the audio signal (such as amplitude, frequency, or other parameters) are continuously adjusted based on the detected motion characteristics. This dynamic adjustment allows the bio-feedback to be embedded within the music signal in a way that adapts to the user's motion state while preserving the overall audio quality.
Solution Approach 2:
The patent changes parameters of the audio signal (such as amplitude, frequency, or other audio characteristics) based on the detected motion characteristics. By modifying audio parameters dynamically according to motion data, the system embeds bio-feedback within the music signal without severely degrading the underlying audio source.
3Loss of information
If multiple audio sources are played simultaneously for bio-feedback, then motion guidance is provided, but complete disruption of audio sources occurs
Solution Approach 1:
The patent merges multiple audio sources (music and bio-feedback signals) into a single mixed audio output. This combining approach allows motion guidance information to be conveyed while preventing the complete disruption that would occur if multiple sources were played independently and simultaneously.
Solution Approach 2:
The patent applies partial action by selectively mixing only the necessary components of the bio-feedback signal with the music source at appropriate volume levels. This partial integration provides sufficient motion guidance information while avoiding the excessive audio disruption that would result from playing full-strength multiple audio sources simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system enhances user performance by providing continuous, real-time audio feedback that optimizes motion characteristics, improving rehabilitation and sports performance by adjusting audio signals based on motion deviations, thus improving focus and accuracy without disrupting the underlying audio source.
Implementation Method 1
amplitude modulation (AM) is an audio Fx with two adjustable parameters: AM depth and AM frequency
Implementation Method 2
AM frequency is controllable from 0 Hz up to 16 Hz
Data Source
AI summary
A system measures performance activity of a user using a motion capture device, such as one or more knee sleeves each a plurality of inertial-measurement unit. Captured motion characteristic data is classified against previously captured data and then mapped to particular audio effects, which are then altered in different ways depending on the classification and provided the user. The audio feedback works to improve the user's performance of the activity by changing between negative and positive feedback depending on the user's performance. The system regularly measures the motion capture data, altering audio effects provided to the user, until the user reaches an improvement goal.