Class B Hearing Aid Amplifier for Sound Quality and Battery Life
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Solution Overview
Problem
Many individuals who need hearing aids do not obtain them due to high costs and the requirement of professional fitting, leading to unsatisfactory sound quality and limited accessibility, resulting in approximately 80% of those who need hearing aids going without them, causing significant economic losses and social challenges.
Innovation Solution
Development of a low-cost, one-size-fits-many hearing aid with improved amplification circuits using a bipolar Class B circuit and removable dampers, which can be self-fitted and provides extended battery life, reducing the need for professional dispensing and enhancing sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If Class D amplifiers and receivers are used to provide high-fidelity performance at high input levels, then sound quality is improved, but cost increases
Solution Approach 1:
The patent changes the operating parameters of the amplifier by using a bipolar Class B circuit instead of Class D, operating at lower voltage levels (1.5V to 3.0V) to reduce power consumption and cost while maintaining adequate sound quality through optimized biasing and transistor selection
2Manufacturing precision
If professional fitting procedures are required for hearing aids, then sound quality is improved, but accessibility and ease of use worsen
Solution Approach 1:
The patent creates a universal hearing aid design with standardized ear tips and adjustable components that can be used by multiple users without custom fitting, while maintaining good sound quality through built-in adjustment mechanisms for volume and tone preferences
Solution Approach 2:
The hearing aid incorporates self-adjusting features and intuitive controls that allow users to fit and adjust the device themselves without requiring professional assistance, while maintaining adequate sound quality through pre-configured amplification settings
3Duration of action of moving object
If battery power is extended for longer wear, then duration of action is improved, but power consumption management becomes more challenging
Solution Approach 1:
The patent implements periodic duty cycling of the amplifier, switching between active and sleep modes to extend battery life while maintaining the ability to provide adequate power during active listening periods through efficient startup and standby configurations
Solution Approach 2:
The patent optimizes power consumption by changing operating voltage parameters to 1.5V to 3.0V ranges and adjusting bias currents in the Class B amplifier to minimize static power draw while maintaining sufficient output power for extended battery operation
Data Source
AI summary
Certain embodiments of the present technology provide improved amplification circuits and hearing aids that can utilize such amplification circuits. In an embodiment, for example, an amplification circuit includes: a first sub circuit configured to create a voltage drop when a supply voltage is above a first voltage; and a second sub circuit configured to create a reverse voltage drop when the supply voltage is below a second voltage, wherein the first and second sub circuits operate to maintain idling current within a range. Certain embodiments of the present technology also provide hearing aids that include removable dampers.