Ear Simulator Vibration Measurement for Electronic Devices
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Solution Overview
Problem
Current methods for measuring sound pressure and vibration amount transmitted to a human body through a vibrator do not accurately evaluate electronic devices, as they do not account for the characteristics of vibration transmission to a human ear, leading to incorrect assessments of vibration levels and sound pressure.
Innovation Solution
A measuring apparatus featuring an ear simulator that mimics a human ear, with a vibration detection unit placed around an artificial ear canal, and a sound pressure measuring unit, allowing for the accurate measurement of vibration levels weighted with human ear characteristics, thereby providing a correct evaluation of electronic devices that transmit sound through vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measurement methods are used to measure sound pressure and vibration amount, then the measurement process is simple, but the measurement precision is insufficient because it does not account for human ear vibration transmission characteristics
Solution Approach 1:
The patent uses an artificial ear model that copies the structural characteristics of a human ear, including the ear canal shape and mastoid process geometry. This artificial ear replicates the vibration transmission characteristics of the human ear, allowing conventional measurement devices to achieve accurate measurements by measuring the artificial ear instead of the actual human ear, thus resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The artificial ear serves as an intermediary between the vibration source and the measurement device. It transmits vibrations in a manner that mimics human ear characteristics, enabling the measurement device to indirectly measure vibration transmission properties accurate to human ears without requiring direct measurement from actual human ears, thereby improving precision while maintaining measurement system simplicity
2Measurement precision
If vibration detection unit is placed on the periphery of artificial ear canal, then the measurement can capture vibration transmission characteristics accurately, but the device complexity increases
Solution Approach 1:
The measurement apparatus is segmented into distinct functional components: the artificial ear model, the vibration detection unit positioned at specific locations (including the periphery of the artificial ear canal), and the sound pressure measurement unit. This segmentation allows each component to be optimized independently - the artificial ear provides the appropriate geometry, the vibration detection unit captures vibration characteristics, and the sound pressure unit measures acoustic pressure, thereby achieving accurate measurements without unnecessary complexity
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
The apparatus enables precise measurement of vibration levels and sound pressure transmitted to a human ear, allowing for a detailed evaluation of electronic devices, ensuring accurate assessment and reliability in various measurement scenarios.
Implementation Method 1
a vibration detection unit disposed on a periphery of an artificial ear canal formed in the ear simulator
Implementation Method 2
sound pressure transmitted to a human ear
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Provided is a measuring apparatus capable of measuring a vibration amount weighted with characteristics of vibration transmission to a human ear and capable of evaluating correctly an electronic device having a vibrator. A measuring apparatus 10 configured to evaluate an electronic device 100 that transmits vibration sound to a human ear by pressing a vibrator 102 held in a housing 101 thereto, including an ear simulator 50 that mimics a human ear, and a vibration detection unit 55 disposed on a periphery 52 of an artificial ear canal 53 formed in the ear simulator 50.