Bone Conduction Device Testing with Vibration and Acoustic Simulation
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Solution Overview
Problem
Existing voice communication quality evaluation methods for bone conduction communication devices fail to accurately test devices with bone conduction elements due to issues with signal collection by artificial mouth and ear components.
Innovation Solution
A method and apparatus that utilize a vibration exciter to simulate bone vibrations and an artificial mouth to generate acoustic signals, processed by digital signal processors, allowing accurate collection and testing of bone conduction communication devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing ACQUA testing system with artificial mouth and ear is used, then voice communication quality can be evaluated, but bone conduction communication devices cannot be properly tested because the artificial mouth cannot collect bone conduction signals and the artificial ear cannot collect air conduction signals from the device
Solution Approach 1:
The testing system is divided into independent functional modules: a vibration exciter for bone conduction signal generation, an artificial mouth for acoustic signal generation, and a digital signal processor for signal processing. This segmentation allows each module to be optimized for its specific function and enables flexible combination to test different device types including bone conduction communication devices.
Solution Approach 2:
A vibration exciter is introduced as an intermediary device between the testing system and the bone conduction communication device. The vibration exciter generates bone conduction vibrations that are transmitted through the device to be tested, enabling the collection of bone conduction signals by the artificial mouth and subsequent processing by the digital signal processor.
2Adaptability or versatility
If a vibration exciter is added to simulate bone vibrations, then bone conduction signal collection is enabled, but the device complexity of the testing system increases
Solution Approach 1:
The vibration exciter is designed with multi-functionality, serving both as a bone conduction signal generator and as a component that can work with the artificial mouth to test various types of communication devices. The digital signal processor also performs multiple functions including signal processing, analysis, and evaluation, reducing the need for separate dedicated components.
Solution Approach 2:
The testing system merges the vibration exciter, artificial mouth, and digital signal processor into an integrated testing apparatus. These components are combined in a coordinated system where the vibration exciter works simultaneously with the artificial mouth, and both feed signals to the digital signal processor, reducing overall system complexity compared to having separate testing systems.
3Measurement precision
If digital signal processing is used to process test audio, then signal processing accuracy is improved, but the processing time and computational complexity increase
Solution Approach 1:
The digital signal processor performs preliminary actions by pre-processing the test audio signals before they are collected by the artificial mouth and vibration exciter. This includes preparing the signals in advance, performing initial analysis, and optimizing the signal parameters to be tested, which reduces the processing time required during the actual measurement phase.
Solution Approach 2:
The digital signal processor operates continuously to maintain efficient signal processing throughout the testing process. Rather than performing all processing in discrete steps, the system maintains continuous signal flow and processing, which improves measurement precision while minimizing idle processing time and optimizing overall testing efficiency.
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 accurate simulation of human sound production and bone vibrations, providing objective evaluation of bone conduction communication devices through synchronized signal processing and collection.
Implementation Method 1
simulating vibration of a bone at a corresponding part by which human generates sound using the vibration exciter to generate a vibration signal
Implementation Method 2
simulating human sound production using the artificial mouth to generate an acoustic signal
Data Source
AI summary
A method, an apparatus and a system for testing a bone conduction communication device is disclosed. A vibration exciter is disposed at a wearing position of an artificial head model where the bone conduction communication device is located. The method comprises: transmitting a test audio to first and a second digital signal processors; transmitting an audio signal processed by the first digital signal processor to the vibration exciter, and simulating vibration of a bone at a corresponding part by which human generates sound using the vibration exciter, to generate a vibration signal; transmitting an audio signal processed by the second digital signal processor to an artificial mouth and simulating human sound production to generate an acoustic signal; collecting the vibration signal and the sound signal using the bone conduction communication device, and testing the bone conduction communication device according to the collected vibration signal and sound signal.