In-Ear Acoustic Data Readout for Hearing Instruments
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Solution Overview
Problem
Conventional hearing instruments face challenges with power-efficient two-way communication due to limited battery life and signal attenuation when placed in the ear canal, making it difficult to access and verify device status and programming data.
Innovation Solution
A contact-free bidirectional communication system using acoustic signals, where the hearing instrument emits binary-encoded signals at specific frequencies and the accessory amplifies and processes these signals using tuned channels and microphones to improve signal-to-noise ratio, allowing for power-efficient data readout without draining the device's battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If two-way communication is implemented between hearing instrument and remote accessory, then data readout capability is improved, but battery power is quickly drained
Solution Approach 1:
The patent replaces electromagnetic communication (radio signals) with acoustic communication. The hearing instrument uses its speaker to emit acoustic signals that encode data, which are then detected by a microphone in the remote accessory. This substitution of the communication medium from electromagnetic to acoustic energy allows two-way communication while preserving battery life, as acoustic transmission consumes significantly less power than radio transmission.
Solution Approach 2:
The patent introduces acoustic waves as an intermediary medium for data transmission. Instead of directly transmitting electromagnetic signals, the system encodes digital data into acoustic frequency modulations (e.g., 1 kHz for binary 0, 2 kHz for binary 1). The acoustic waves serve as the mediator that carries information from the hearing instrument to the remote accessory, enabling communication through a low-power channel.
2Reliability
If hearing instrument emits strong acoustic signals for data transmission, then communication reliability is improved, but user disturbance increases
Solution Approach 1:
The patent changes the parameters of acoustic signal transmission by using frequency modulation instead of amplitude modulation. Data are encoded by varying the frequency of acoustic signals (e.g., 1 kHz for binary 0, 2 kHz for binary 1) rather than varying the amplitude. This allows reliable communication through frequency discrimination while keeping the acoustic intensity low enough to avoid user disturbance. The remote accessory detects frequency changes rather than amplitude changes, maintaining communication reliability with minimal acoustic output.
3Ease of operation
If hearing instrument is placed deep in ear canal for comfort, then wear comfort is improved, but signal transmission quality deteriorates
Solution Approach 1:
The patent replaces electromagnetic signal transmission with acoustic signal transmission. Acoustic signals propagate effectively through the ear canal environment and can be detected by external microphones even when the hearing instrument is positioned deep in the ear canal. This substitution maintains signal transmission quality while allowing the hearing instrument to be placed in the optimal position for patient comfort.
Solution Approach 2:
The patent uses acoustic waves as an intermediary that can traverse the ear canal environment effectively. The acoustic signals are emitted by the hearing instrument's speaker and detected by external microphones, creating an intermediate transmission path that bypasses the limitations of electromagnetic signal transmission through the ear canal. This intermediary acoustic channel maintains signal quality regardless of the hearing instrument's position in the ear canal.
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
Enables reliable and efficient communication between the hearing instrument and an outside accessory, reducing battery drain and allowing for accurate data retrieval even when the device is sealed inside the ear canal, while minimizing user disturbance from strong acoustic signals.
Implementation Method 1
the hearing instrument responds by emitting acoustic signals from the hearing instrument's built-in speaker
Implementation Method 2
the accessory may include channels that are frequency-tuned to amplify select frequencies (e.g., the frequencies of the acoustic frequencies corresponding to bits 0 and 1)
Implementation Method 3
one or more microphones can be placed at the end of the tuning channels to acquire the acoustic signals arriving from the hearing instrument
Data Source
AI summary
Systems and methods for two-way communication with a hearing device are disclosed. In one embodiment, an accessory for communication with a hearing device includes an acoustic filter, and a microphone configured as an acoustic receiver (RX) for acoustic signals from a speaker of the hearing device via the acoustic filter. The acoustic filter is configured to operate at at least one resonance frequency. The accessory is in acoustic and magnetic communication with the hearing device.