In-Ear Monitor Tip Venting for Variable Ear Canal Volume
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Solution Overview
Problem
In-ear monitors face challenges in achieving optimal sound quality due to varying ear canal volumes and shapes, leading to distorted sound reproduction and diminished acoustic performance.
Innovation Solution
The in-ear monitor design incorporates a configurable in-ear monitor tip with a cellular foam annular member, strategically placed vent apertures, and a vortex-shaped exit aperture to manage air pressure and sound waves, optimizing sound quality by adjusting to individual ear canal volumes and shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a closed body enclosure is used to trap air and create pressure for pistonic speaker motion, then sound quality is improved, but the varying ear canal volumes cause distorted sound reproduction
Solution Approach 1:
The foam coupler is designed to be compressible and adaptable, allowing it to conform to different ear canal volumes and shapes. The material properties enable dynamic adjustment to match the specific acoustic volume of each user's ear canal, maintaining pistonic speaker motion across varying anatomical conditions.
Solution Approach 2:
The invention changes the physical parameters of the coupler by using foam material with specific compressibility and density characteristics. This allows the coupler to adjust the effective acoustic volume within the ear canal system, compensating for variations in ear canal geometry while maintaining optimal sound reproduction.
2Stress or pressure
If foam couplers are used to release static air pressure, then air pressure management is improved, but the original sound signature becomes muffled
Solution Approach 1:
The foam coupler utilizes porous material properties to selectively manage air pressure while preserving sound quality. The pore structure allows controlled air exchange to release static pressure without creating a complete seal that would muffles sound, enabling both pressure management and sound signature preservation.
3Manufacturing precision
If the ear canal is sealed to create a closed space for acoustic wave propagation, then acoustic performance is improved, but noise interference increases and sound distortion occurs
Solution Approach 1:
The foam coupler acts as an intermediary element between the sealed enclosure and the ear canal. It provides a compliant interface that maintains the necessary acoustic sealing for performance while allowing controlled air pressure equalization, reducing noise interference and preventing sound distortion through its intermediate pressure management function.
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 design enhances sound quality by minimizing noise interference, maintaining acoustic alignment, and providing a personalized fit, resulting in clearer and more enjoyable audio experiences.
Implementation Method 1
The cellular foam annular member is disposed in the annular aperture... where the foam annular member is removable and replaceable with a foam annular member having a different density
Implementation Method 2
The in-ear monitor includes a body having a front end and a rear end and houses a transducer... The transducer is for converting an electrical signal into an acoustic signal
Implementation Method 3
An array of vent apertures is disposed at the distal end of the in-ear monitor tip
Implementation Method 4
The in-ear monitor tip includes an internal sleeve extending from the proximal end to the distal end... the distal end of the internal sleeve having an exit aperture to provide for the acoustic signal to exit the in-ear monitor into the ear canal
Data Source
AI summary
An in-ear monitor for placement in an ear canal includes a body housing a transducer for converting creating an acoustic signal. An outlet extends from the housing for the acoustic signal. The monitor includes a tip having a proximal end adjacent the outlet and a distal end disposed in the ear canal. The tip includes an internal sleeve extending from the proximal end to the distal end, the proximal end for receiving the outlet, the distal having an exit aperture to for the signal to exit into the ear canal. An external sleeve extends from the proximal end to the distal end for receipt into the ear canal. The external sleeve is connected to the internal sleeve at the distal end. An annular aperture is disposed between the internal and external sleeves. Vents are disposed at the distal end. A replaceable cellular foam annular member is disposed in the aperture.