Audio Calibration System for Hearing Detection
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Solution Overview
Problem
Existing audio calibration systems require professional equipment for hearing compensation adjustments, making it time-consuming and costly for users with impaired hearing to obtain personalized hearing curves.
Innovation Solution
An audio calibration system comprising an audio generator, cloud server, and mobile computing device with a microphone, computing unit, and audio control interface, which generates calibration values using test sounds without pre-calibrating the microphone and audio playback unit, allowing dynamic adjustments with any pluggable audio playback unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If professional equipment that is fully calibrated is used to obtain hearing curves, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses a mobile device with a standard microphone to copy or simulate the function of professional calibrated equipment. Instead of requiring actual professional calibration equipment, the system creates a virtual calibration environment where the mobile device's microphone serves as a substitute, eliminating the need for expensive specialized hardware while maintaining sufficient measurement capability for hearing curve generation.
Solution Approach 2:
The patent introduces a calibration value as an intermediary parameter that bridges the gap between uncalibrated consumer equipment and professional measurement standards. By calculating a calibration value from the relationship between known sound pressure levels and the mobile device's microphone readings, the system creates a mediation layer that enables accurate hearing curve measurement without direct use of professional equipment.
2Measurement precision
If professional equipment that is fully calibrated is used to obtain hearing curves, then measurement precision is improved, but time consumption increases
Solution Approach 1:
The patent performs preliminary calibration by having the user listen to test sounds and provide feedback before the actual hearing curve measurement. The system pre-calculates calibration values based on the user's responses to standardized test sounds, so that when the actual hearing measurement is taken, the mobile device is already calibrated to that user's characteristics, eliminating the need for time-consuming on-site professional calibration during the measurement process.
Solution Approach 2:
The system enables self-service calibration where the user themselves performs the calibration process by listening to test sounds and providing feedback through the mobile device interface. This eliminates the need for professional technicians to perform calibration, allowing users to complete the calibration process themselves in a convenient setting, significantly reducing the time and logistical complexity associated with professional equipment calibration.
3Measurement precision
If professional equipment is used for hearing detection, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent replaces expensive, durable professional calibration equipment with inexpensive, readily available consumer electronics (mobile devices with standard microphones). While consumer devices may have shorter lifespans and lower durability compared to professional equipment, they provide sufficient performance for the intended application at a fraction of the cost, making hearing curve measurement accessible to general consumers rather than just clinical settings.
Solution Approach 2:
The patent makes the mobile device serve multiple functions: it acts as both the audio playback device (replacing dedicated calibration speakers) and the measurement device (using its built-in microphone). This multi-functionality eliminates the need for separate professional calibration equipment and measurement equipment, reducing overall system cost while maintaining measurement precision through software-based calibration algorithms.
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 convenient and cost-effective hearing detection for users by eliminating the need for expensive professional equipment and shared audio playback units, reducing the time and cost associated with traditional calibration methods.
Implementation Method 1
an audio generator 10, a cloud server 20, a mobile computing device 30... The audio generator 10 plays the first test sound 21
Implementation Method 2
The mobile computing device 30... includes a microphone 31, the computing unit 32... generates a first value X after receiving the first test sound played by the audio generator through the microphone 31
Data Source
AI summary
An audio calibration system applied to a hearing detection device includes an audio generator, a cloud server, a mobile computing device, and an audio playback unit. The audio generator plays a first test sound. A sound pressure level of the first test sound at any frequency between 500 Hz and 4000 Hz is Z. A computing unit of the mobile computing device generates a first value X after receiving the first test sound through a microphone, and the computing unit generates a second value Y after receiving a second test sound through the microphone. The audio playback unit receives an audio command from an audio control interface, and plays the second test sound to the microphone. The computing unit obtains a calibration value through a relational expression of Z+(Y−X).