Waterproof Acoustic Module for Sensitivity Consistency
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Solution Overview
Problem
Acoustic devices face challenges in maintaining waterproofing and sensitivity consistency, leading to low yield rates due to difficulties in adjusting sensitivity differences among devices in a batch, especially when exposed to humid environments.
Innovation Solution
An acoustic module with a waterproof assembly and acoustic transducer is prefabricated, allowing for flexible adjustment of sensitivity differences within a batch by mounting the module in the device, ensuring consistent sensitivity and improved waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the acoustic transducer is sealed with a waterproof structure in the housing, then waterproofing is improved, but sensitivity adjustment becomes difficult and yield rate decreases
Solution Approach 1:
The device is divided into separate functional modules: a housing assembly containing the acoustic transducer and waterproof membrane, and a separate circuit board assembly. This segmentation allows the waterproof structure to be independently optimized while maintaining adjustability of sensitivity through the separate circuit board that can be accessed and modified without compromising the sealed housing.
2Reliability
If the acoustic transducer is sealed with a waterproof structure in the housing, then waterproofing is improved, but sensitivity consistency across batch decreases
Solution Approach 1:
The circuit board is designed with flexible traces that can be adjusted during assembly to optimize sensitivity matching across devices in a batch. This dynamic adjustment capability allows sensitivity consistency to be improved while the housing remains permanently sealed for waterproofing.
Solution Approach 2:
The circuit board parameters (such as trace length, width, or positioning) can be modified during assembly to adjust sensitivity. This allows each device in a batch to be tuned to meet sensitivity specifications while the waterproof housing structure remains unchanged and sealed.
3Reliability
If the acoustic transducer is sealed with a waterproof structure in the housing, then waterproofing is improved, but device complexity increases
Solution Approach 1:
By segmenting the device into a sealed housing assembly and a separate circuit board assembly, the complexity of the waterproofing structure is isolated to one module, while the other module maintains simplicity for sensitivity adjustment. This reduces overall device complexity compared to integrating both functions in a single sealed 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 ensures sensitivity differences among acoustic devices are within an ideal range, enhancing yield rates and providing effective waterproofing against liquids.
Implementation Method 1
a first waterproof assembly disposed within the first accommodation cavity and covering the first sound guiding hole to prevent liquid from entering the first accommodation cavity through the first sound guiding hole
Implementation Method 2
a first circuit board disposed between the first acoustic transducer and the first waterproof assembly and mechanically connected to the first acoustic transducer
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C
AI summary
The present disclosure provides an acoustic module and an acoustic device, and relates to the technical field of electronic devices. The acoustic module includes a base, a first waterproof assembly, and a first acoustic assembly. The base includes a base sidewall, a base bottom wall, and a first sound guiding hole. The base sidewall and the base bottom wall form a first accommodation cavity, and the first sound guiding hole penetrates the base bottom wall and communicates with the first accommodation cavity. The first waterproof assembly is disposed within the first accommodation cavity and covers the first sound guiding hole to prevent liquid from entering the first accommodation cavity through the first sound guiding hole. The first acoustic assembly includes a first acoustic transducer and a first circuit board. The first acoustic transducer is disposed on a side of the first waterproof assembly away from the base bottom wall, and the first circuit board is disposed between the first acoustic transducer and the first waterproof assembly and is mechanically connected to the first acoustic transducer. By using the acoustic module, a sensitivity difference among different acoustic devices is kept within an error range to ensure consistency of acoustic devices.