Hand Emulator Positioning for Realistic Portable Audio Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current measurement standards for portable audio devices ignore the effect of a user's hands on frequency response and sound distribution, leading to inaccuracies in loudspeaker and microphone testing.
Innovation Solution
A hand emulator with movable fingers and limit pillars that mimic human hand characteristics, allowing accurate and repetitive positioning of devices under test, equipped with acoustic and vibration features to emulate real-world usage scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional measurement standards are used, then testing process is simple, but frequency response measurement accuracy deteriorates due to ignoring hand effects
Solution Approach 1:
The patent creates a hand emulator that copies the acoustic and vibration characteristics of a user's hand. The emulator includes a palm model with acoustic chambers that replicate the hand's effect on sound waves, allowing accurate frequency response measurements without requiring actual human hands in the testing system.
Solution Approach 2:
The hand emulator serves as an intermediary between the device under test and the measurement system. It positions the device in a standardized manner that mimics real-world usage conditions, mediating the interaction between sound waves and the device while maintaining measurement accuracy.
2Manufacturing precision
If hand emulator with movable fingers is designed, then positioning accuracy improves, but device complexity increases
Solution Approach 1:
The hand emulator incorporates movable fingers that can adjust their positions to accommodate different device sizes and shapes. The fingers are designed with degrees of freedom allowing them to move between extended and flexed positions, enabling the emulator to adapt to various portable devices while maintaining consistent positioning accuracy.
Solution Approach 2:
The emulator is divided into separate functional segments including a palm base, multiple independent fingers, and adjustable limit pillars. Each finger can be positioned independently, and the limit pillars can be adjusted along the fingers to create accommodating spaces of different sizes, allowing precise positioning for different device types.
3Stability of the object's composition
If limit pillars are added to the palm, then device positioning stability improves, but manufacturing complexity increases
Solution Approach 1:
The limit pillars are designed to be movable rather than fixed, allowing them to be adjusted along the fingers to accommodate different device dimensions. This dynamic design provides stable positioning for various device sizes while simplifying manufacturing by using adjustable components rather than multiple fixed structures.
Solution Approach 2:
The limit pillars serve multiple functions: they define the boundaries of the accommodating space, provide positioning stability, and can be adjusted to work with different device types. This multi-functionality reduces the need for additional specialized components, simplifying the overall manufacturing process.
Data Source
AI summary
Provided is a hand emulator and an acoustic testing system. The hand emulator includes: a main support configured to support a device under test, the main support includes a palm, a thumb, an index finger, a middle finger, a ring finger and a little finger that are movably arranged at an end of the palm; a stopper including a plurality of limit pillars, at least some of the plurality of limit pillars are arranged on the palm, several limit pillars of the plurality of limit pillars enclose to form an accommodating space, and the device under test is limited within the accommodating space. The hand emulator can measure the frequency response of the speaker and/or the microphone of the device under test, emulate acoustic characteristics similar to the user's hand, and accurately and repetitively position the device under test, which improves existing measurement standards and creates new testing methods.