Canalphone Signal Multiplexing for Class D Audio and Ambient Pickup
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Solution Overview
Problem
Current sound reproduction systems, such as headphones, face issues with complex hardware and software components, fixed equalization networks, inability to use class D amplifiers, limited customization, and acoustic isolation, which affect size, usability, and safety in various situations.
Innovation Solution
A sound reproduction system utilizing a digital data channel multiplexed into several bidirectional channels for power, audio, and microphone signals, enabling class D amplifiers and customizable parameters, with a reduced component count and intuitive interface, allowing external sound pickup and compatibility with existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple acoustic transducers are used to achieve good frequency response, then acoustic performance is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple acoustic transducers (woofer, mid-range, tweeter) into a single integrated canalphone device with unified control electronics and power management, reducing the number of separate components and simplifying the overall system architecture while maintaining comprehensive frequency response coverage
Solution Approach 2:
The canalphone device integrates multiple functions including audio playback, noise cancellation, and environmental sound monitoring within a single unit, eliminating the need for separate devices and reducing overall system complexity
2Ease of manufacture
If fixed equalization networks are used for transducers, then manufacturing is simplified, but acoustic response consistency deteriorates
Solution Approach 1:
The patent implements dynamic equalization networks that can adjust their characteristics based on measured acoustic responses, allowing the system to adapt to variations in transducer performance and maintain consistent acoustic response across different units while using standardized manufacturing processes
Solution Approach 2:
The system incorporates feedback mechanisms that measure the actual acoustic response and adjust the equalization parameters accordingly, ensuring consistent performance across different manufactured units despite component tolerances
3Use of energy by moving object
If class D amplifiers are used with multiple wired connections, then power efficiency is improved, but device usability deteriorates
Solution Approach 1:
The patent combines multiple signal connections into a single integrated wiring system that carries both audio signals and control signals, eliminating the need for multiple separate wired connections and making the device practical for wearable use while maintaining class D amplifier efficiency
4Reliability
If acoustic isolation is provided in canalphones, then sound reproduction quality is improved, but safety deteriorates
Solution Approach 1:
The patent implements dynamic control of the acoustic seal, allowing the user to adjust the level of isolation from ambient sounds, enabling the device to transition between high-isolation mode for music reproduction and low-isolation mode for safety awareness in hazardous environments
5Adaptability or versatility
If multiple hardware and software components are used, then functionality is improved, but device size increases
Solution Approach 1:
The patent integrates multiple hardware components including amplifiers, equalization networks, and processing units into a compact unified structure within the canalphone device, reducing the overall volume while maintaining diverse functionality
Solution Approach 2:
The system employs nested integration where smaller functional units are embedded within larger structural elements, optimizing space utilization and reducing device size while preserving all required functions
Data Source
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AI summary
A sound reproduction system (100) of signals having relative customizable parameters, wherein the system comprises a first canalphone (10) or bonnet suitable for receiving a signal, converting it, and subsequently reproducing it, when in use. Advantageously, the system (100) comprises a transceiver (20) connected to the first canalphone (10) adapted to receive and transmit the signal to said canalphone (10). The present invention also relates to a process for sound reproduction using a system (100) as described.