Bone Conduction Audio Driver Feedback Control
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Solution Overview
Problem
Existing methods for controlling power and equalization in bone conduction elements are inefficient due to the lack of immediate feedback, leading to variable performance as the device is re-attached or during movement, affecting the coupling quality and thus the volume and frequency response.
Innovation Solution
A system and method that utilize a bone conduction sensor to capture feedback vibrations from the skull, allowing for adaptive control of the audio driver amplifier through a feedback circuit, ensuring optimal power and equalization settings by adjusting the gain and frequency response based on real-time feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing methods for controlling power and equalization in bone conduction elements are used, then device simplicity is maintained, but performance consistency deteriorates due to lack of feedback
Solution Approach 1:
The patent implements a feedback control system where a sensor detects bone vibrations generated by the bone conduction element, and the detected signal is used to adjust power and equalization settings in real-time. This closed-loop feedback mechanism ensures consistent performance by automatically compensating for variations in coupling quality between the bone conduction element and the user's bone structure.
2Reliability
If manual adjustments are required for optimal performance, then performance can be optimized, but user convenience deteriorates
Solution Approach 1:
The system performs self-adjustment by automatically detecting bone vibrations through the sensor and modifying power and equalization parameters without user intervention. The control system continuously monitors the coupling quality and autonomously optimizes performance, eliminating the need for manual adjustments while maintaining consistent audio quality.
3Reliability
If power is increased to maintain volume during movement, then volume consistency is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts power consumption based on real-time feedback from the sensor. Instead of maintaining constant high power output, the control system modulates power levels according to the detected bone vibration characteristics, increasing power only when coupling quality deteriorates and reducing power when coupling is optimal. This dynamic adaptation maintains volume consistency while minimizing overall power consumption.
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 approach enhances user experience by maintaining consistent performance, reducing the need for manual adjustments and preventing excessive volume, while optimizing power consumption and extending battery life.
Implementation Method 1
obtaining, via a bone conduction sensor that is in contact with the user, feedback relating to the outputting of the acoustic signals via the bone conduction element
Data Source
AI summary
Methods and systems are provided for controlling bone conduction, in which a bone conduction element may be used to output acoustic signals when it is in contact with a user. A bone conduction sensor may also be made in contact with the user, and used to obtain feedback relating to the outputting of the acoustic signals via the bone conduction element. The outputting of the acoustic signals may then be adaptively controlled based on processing of the feedback. The adaptive controlling may comprise adjusting components and/or functions related to or used in the outputting of the acoustic signals. For example, the adaptive controlling may comprise adjusting gain, frequency response, and/or equalization associated with a drive amplifier driving the bone conduction element.