Silent Push-to-Talk Switch for Covert Radio Operations
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Solution Overview
Problem
Conventional push-to-talk switches used in portable two-way radios produce audible noise when actuated, which can be detrimental in covert operations and dangerous situations, as it may alert others and compromise the user's safety.
Innovation Solution
A substantially silent push-to-talk switch is designed with a housing and sound damping/insulating material to reduce sound levels below the threshold of hearing, using a diaphragm to actuate a switch without producing an audible sound, and can be integrated into an inline cable assembly for portable two-way radios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional push-to-talk switch is used, then the user receives audible feedback that the switch has been actuated, but audible noise is produced that can alert others and compromise safety in covert operations
Solution Approach 1:
The patent extracts the harmful audible noise from the switch actuation process by using a silent switch mechanism. The switch is designed to provide tactile feedback without producing audible clicking sounds, thereby removing the harmful acoustic emission while preserving the operational feedback function.
Solution Approach 2:
The patent converts the potentially harmful audible noise into a beneficial silent operation. By using a silent switch mechanism, the design transforms the situation where noise was a problem into one where the switch provides reliable tactile feedback without the harmful acoustic signature, making it suitable for covert operations.
2Object-affected harmful factors
If sound damping material is added to reduce switch noise, then audible noise is reduced below threshold of hearing, but device complexity increases
Solution Approach 1:
The patent merges the sound damping function with the existing housing structure. Rather than adding separate complex damping components, the housing is designed to inherently provide sound attenuation, combining structural support and noise reduction functions into a single integrated component.
Solution Approach 2:
The patent applies sound damping properties locally at the switch actuation point within the housing. The housing structure is designed with specific local characteristics that absorb or block sound waves generated during switch actuation, providing noise reduction precisely where needed without requiring comprehensive modification of the entire device.
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 silent operation enhances suitability for use in situations where noise could jeopardize the user's safety, allowing for secure communication without alerting others, and the switch can be actuated reliably regardless of the direction or angle of button press.
Implementation Method 1
Sound damping/insulating material can be disposed within the housing so as to reduce the sound of the switch such that the switch is not audible when actuated
Data Source
AI summary
A push-to-talk switch can have a switch that does not produce an audible sound when actuated. For example, the push-to-talk switch can comprise a membrane switch or a capacitive switch that produces less than 0 dB(A) of wideband sound when actuated. The switch can be actuated by pushing a diaphragm. Sound damping material can be used to mitigate audibility of the switch. Because the push-to-talk switch is substantially silent, it can be used in applications such as covert operations and battle situations where the sound of actuating the switch could have life threatening consequences.