Canine Earplug with Shape Memory Alloy Spring Bias
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Solution Overview
Problem
Current hearing protection devices for animals, particularly dogs, face challenges such as poor fit due to varying sizes and shapes, leading to inadequate sound dampening and discomfort, and often interfere with communication or work performance, as they are not adaptable to the unique anatomy of canine ears.
Innovation Solution
A sound-dampening earplug designed with a resilient elastomeric material, featuring a shape that corresponds to the dog's ear canal, including a spring element made of shape memory alloy and a cap element for secure fit and customizable sound conditioning, allowing for noise cancellation and communication signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If insulated earmuffs or covers are used to provide hearing protection, then sound dampening is achieved, but the device does not fit well due to varying sizes and shapes of animal ears
Solution Approach 1:
The earplug body is designed with a specific shape that corresponds to the anatomy of the dog ear canal, with a first portion for the vertical canal and a second portion for the horizontal canal. This localized shaping provides adaptive fit to the specific geometry of different ear canals while maintaining effective sound dampening throughout the canal structure.
Solution Approach 2:
The earplug body is made of resilient elastomeric material that can deform and conform to the specific dimensions and shape of individual ear canals. This material property allows the same device design to adapt to varying sizes and shapes across different animals, resolving the contradiction between standardized manufacturing and individualized fit.
2Object-affected harmful factors
If traditional earmuffs are used to protect ears, then hearing protection is provided, but the devices are uncomfortable and may be dislodged
Solution Approach 1:
The earplug is designed to be inserted deep into the ear canal, with the first portion fitting the vertical canal and the second portion extending through the elbow region into the horizontal canal. This nested insertion deep within the canal anatomy provides secure retention and prevents dislodgment while maintaining comfortable wear.
Solution Approach 2:
The earplug body is constructed from resilient elastomeric material that provides flexibility to conform to the ear canal walls while maintaining structural integrity. This flexible construction ensures comfortable wear and secure fit without causing discomfort or being dislodged by animal movement.
3Reliability
If earplugs are inserted deep into the ear canal, then secure fit is achieved, but insertion becomes difficult
Solution Approach 1:
The earplug body is made of resilient elastomeric material that can be compressed to a smaller size before insertion. This preliminary compression allows the earplug to be easily inserted into the ear canal, after which it expands to its full size to achieve secure fit and effective sound dampening, resolving the contradiction between ease of insertion and secure retention.
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 earplug provides effective sound dampening while ensuring a secure fit, reducing the likelihood of dislodgment and enhancing communication between animals and handlers, improving performance and comfort.
Implementation Method 1
The spring element is of a shape memory alloy having a transition temperature that is below a normal body temperature of a dog
Implementation Method 2
a spring element encapsulated in the first portion of the earplug body, configured to apply a spring bias radially outward
Data Source
AI summary
A sound-limiting device is provided, that includes an earplug body of a resilient elastomeric material, and that has a first portion whose shape corresponds generally to the shape of the vertical canal of a dog's ear canal, and a second portion sized and configured to flex through the elbow region of the dog's ear canal and into the horizontal canal. A spring element can be encapsulated in the first portion of the earplug body, and configured to apply a spring bias radially outward from an axis extending a length of the earplug body. The spring element is of a shape memory alloy having a transition temperature that is below a normal body temperature of a dog. The device can also include a sound conditioning element configured to produce a signal that is audible to an animal wearing the device.