Portable Audio Calibration System with Environmental Correction
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Solution Overview
Problem
Conventional calibration systems for audio equipment face challenges in accurately measuring transducer output levels due to variations in shape, size, and material, making it difficult to ensure accurate hearing function measurements and device safety.
Innovation Solution
A portable calibration system utilizing a coupler and sensor system that includes a user device with an analyzer module to measure and analyze sound pressure levels, accounting for environmental factors like humidity and noise, and providing correction factors for different transducer types and standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional calibration systems are used to measure transducer output levels, then the measurement process can be performed, but the accuracy is compromised due to variations in transducer shape, size, and material
Solution Approach 1:
The patent introduces a coupler as an intermediary device between the transducer and the measurement system. The coupler includes a cavity that receives the transducer and positioning members that secure it in place, ensuring consistent and accurate measurement across different transducer types by mediating the interaction between the transducer and measurement equipment
Solution Approach 2:
The system applies correction factors that adjust measurement parameters based on transducer-specific characteristics such as size, shape, and material properties. By changing the measurement parameters according to the specific transducer being measured, the system maintains high accuracy across diverse transducer types
2Measurement precision
If calibration measurements are performed without accounting for environmental factors, then the measurement process is simpler, but the accuracy of hearing function measurements and device safety is compromised
Solution Approach 1:
The system performs preliminary measurements of environmental factors such as ambient temperature, humidity, and background noise levels before conducting the calibration measurement. These preliminary actions allow the system to compensate for environmental influences in subsequent calculations, maintaining accuracy while managing complexity through structured data collection
Solution Approach 2:
The system incorporates feedback mechanisms where environmental sensor data is continuously monitored and used to adjust calibration measurements. The measured environmental conditions provide feedback that modifies the calibration results, ensuring accuracy under varying environmental conditions
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 precise calibration of audio transducers by accounting for environmental conditions and transducer-specific characteristics, ensuring accurate measurements and safety standards are met, with a user-friendly interface for easy operation.
Implementation Method 1
a sensor system that allows the measurement and analysis of equivalent sound pressure level emitted by different types of transducers
Data Source
AI summary
A portable calibration system is disclosed that calibrates an audio equipment without using a dedicated sound level meter. The calibration system comprises a coupler configured to couple a transducer to an energy sensor, where an output of the transducer is provided to the energy sensor via the coupler, an analyzer module configured to receive information from the energy sensor regarding the output of the transducer, a processor, in the analyzer module, configured to process the information to provide a result of a calibration for the audio equipment with respect to expected results, and a display configured to display the result of the calibration.