A system for ultrasonic transmission of power and signal to an implanted hearing aid
Bibliographic record
Abstract
We will report on development of a system for efficiently powering implanted hearing aids by transmitting ultrasonic acoustic energy across the skin. As compared to traditional magnetic induction coil power delivery systems, ultrasound-based systems offer a more compact form factor for the same power handling capability and lower electrical loss. Part of the challenge of building such a system for implanted hearing aids is developing efficient modulation and demodulation electronics that can deliver both electrical power and an acoustic frequency signal to the implanted device. We present the design and implementation of an amplitude modulated system in which the power is delivered on the carrier and signal in the modulation sidebands. The transmitter consists of an efficient PWM encoder driving an LC resonator tuned to the ultrasound transducer resonance frequency. The receiver consists of an efficient rectifying demodulator that provides supply voltages to internal electronics as well as the acoustic signal. Power loss mechanisms, form factor considerations, linearity, and overall system performance will be discussed.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".