Microphone Device with Membrane Sidewall for IP69K Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing microphone devices struggle to maintain robust performance in harsh environments, particularly against water and solid particles, which can lead to malfunctions and compromise safety systems in vehicles.
Innovation Solution
A microphone device with a closed housing and a membrane formed by a thinner part of the sidewall, which transmits sound waves to the microphone without openings for water or dust entry, achieving IP69K protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closed housing without openings is used to protect against water and dust, then protection level is improved, but sound transmission capability deteriorates
Solution Approach 1:
The patent employs a membrane formed from a thinner part of the sidewall that acts as a flexible barrier. This membrane allows sound waves to pass through while maintaining the sealed structure needed for IP69K protection against water and dust. The thin film nature of the membrane enables acoustic transmission while the closed housing configuration provides environmental protection.
2Object-generated harmful factors
If the sidewall thickness is reduced to form a membrane, then sound transmission is improved, but mechanical strength deteriorates
Solution Approach 1:
The housing structure features non-uniform thickness with a thinner second part forming the membrane and a thicker first part providing structural support. This local variation in quality allows the membrane area to transmit sound effectively while the thicker portions maintain the overall mechanical strength and rigidity of the housing.
Solution Approach 2:
The sidewall is segmented into different thickness zones: a first part with greater thickness for structural integrity and a second part with reduced thickness for acoustic transmission. This segmentation allows each region to perform its specific function optimally without compromising the other.
3Reliability
If a closed housing is used to prevent water and dust entry, then device reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The membrane is integrated directly into the housing structure as a thinner part of the sidewall rather than being a separate component. This merging of the membrane function into the housing itself reduces the number of parts and assembly steps, simplifying manufacturing while maintaining the sealed protective structure.
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 solution effectively protects microphones from water and dust, ensuring reliable performance even in extreme conditions, thus maintaining the integrity of safety systems in vehicles.
Implementation Method 1
The sound waves which hit the membrane area generate a vibration of this specific area of the housing and a new sound wave is created inside the microphone housing
Data Source
AI summary
The disclosure relates to a microphone device. The microphone device comprises a closed housing with a sidewall, a microphone arranged within the closed housing, and a membrane at an outer surface of the sidewall wherein a first part of the sidewall has a first thickness and wherein the membrane is comprised by, in particular is formed by, a second part of the sidewall having a second thickness smaller than the first thickness. The disclosure further relates to a method for generating the microphone device. The microphone device protects the microphone from water or particles at high protection level.