Earplug With Adjustable Acoustic Valve for Ambient Sound Control
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Solution Overview
Problem
Conventional earplugs either provide inadequate control over ambient sound transmission or require removal to hear external noises, lacking adjustable damping solutions for balanced sound experience.
Innovation Solution
An earplug with a regulating device that adjusts damping levels based on control signals, incorporating an adjustable acoustic valve and user-operated unit for independent damping control, allowing for seamless ambient sound monitoring without removing the earplug, using a microphone and attenuating circuit to manage sound levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the earplug forms a perfect sealing to maximize sound damping, then the user can listen to music or information undisturbedly, but the user cannot hear ambient sounds without removing the earplug
Solution Approach 1:
The patent implements a dynamic acoustic valve that can adjust its opening degree between fully closed and fully open states, allowing the earplug to transition between maximum sealing and maximum ambient sound transmission. This dynamic adjustment mechanism resolves the contradiction by making the sealing property changeable rather than fixed, enabling the user to maintain perfect sealing during music playback while easily accessing ambient sounds when needed.
2Reliability
If the earplug provides fixed maximum damping, then sound leakage is prevented, but the damping level cannot be adjusted for different listening conditions
Solution Approach 1:
The acoustic valve in the patent transforms the fixed damping system into a dynamic one by introducing an adjustable opening mechanism. The valve can be positioned at different opening degrees (fully closed, partially open, fully open) to provide variable damping levels, allowing the earplug to adapt to different listening conditions while maintaining reliable sound isolation when needed.
Solution Approach 2:
The patent changes the damping parameter from a fixed value to a variable one by implementing an adjustable acoustic valve. This allows the damping level to be modified according to different usage scenarios, enhancing the adaptability of the earplug while preserving the ability to achieve maximum sound isolation when required.
3Adaptability or versatility
If an adjustable acoustic valve is added to control damping, then ambient sound transmission can be controlled, but the device complexity increases
Solution Approach 1:
The patent extracts the damping control function into a separate, dedicated acoustic valve component rather than integrating it into the main earplug structure. This modular approach allows for easier manufacturing and maintenance while providing the desired adaptability. The valve mechanism is designed as a distinct element that can be independently controlled and adjusted.
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 users to listen to music or information while easily hearing ambient sounds with adjustable damping, optimizing sound balance and energy efficiency.
Implementation Method 1
an acoustic valve (131) arranged in an acoustic communication (111) between the outside world and the ear canal, which acoustic valve (131) is adjustable between a fully open position and a fully closed position
Implementation Method 2
a loudspeaker device (6) which loudspeaker device (6) is controlled by a receiving unit (7) which receives audio signals
Implementation Method 3
a number of elastic thickenings (3) that serve for acoustically sealing the auditory duct
Implementation Method 4
using a microphone and attenuating circuit to manage sound levels
Data Source
AI summary
An earplug is described for insertion in an auditory duct. The earplug includes a loudspeaker for connection to a playback device. When inserted in a user's ear, the loudspeaker is in acoustic communication with the ear's canal. A transmitter is provided that transmits ambient sound to the ear canal with an adjustable damping level. A regulating unit regulates a damping level depending on detection of control signals to the loudspeaker. When the user does not listen to, for instance, music of the playback device, the user can simply observe ambient sounds without removing the earplug from the ear.