Portable Audio Equipment Partitioned Acoustic Passage Noise Cancellation
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Solution Overview
Problem
Portable sound devices face challenges in effectively collecting optimal sound due to size limitations, which hinder noise distinction and audio quality, especially when downsized for increased portability.
Innovation Solution
Incorporating a housing with a partitioned audio passage and dual microphones, including an inner microphone for body sound collection and an outer microphone for noise distinction, along with a controller for sound processing, and using a waterproof tape for adhesion between components to simplify the structure and enhance noise removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the portable sound device is downsized for increased portability, then the device becomes more portable and convenient, but the ability to collect optimal sound and distinguish noise deteriorates
Solution Approach 1:
The audio passage is divided into two separate passages by a partition: a first audio passage for sound output and a second audio passage for sound collection. This segmentation allows the microphones to be positioned optimally within the downsized device structure, enabling effective sound collection and noise distinction despite the compact form factor.
2Measurement precision
If multiple microphones are physically disposed at optimal locations for noise distinction, then noise distinction capability improves, but the device structure becomes more complex and difficult to downsize
Solution Approach 1:
By dividing the audio passage into separate output and collection passages, the device enables optimal microphone positioning without requiring a complex rotary module. The inner microphone is placed in the second audio passage at an optimal location for voice collection, while the partition simplifies the overall structure compared to traditional rotary mechanisms.
3Object-generated harmful factors
If a partition is added to divide the audio passage, then speaker sound entering the microphone is prevented, but the device structure becomes more complex
Solution Approach 1:
The partition divides the audio passage into a first audio passage for sound output and a second audio passage for sound collection. This simple segmentation effectively prevents speaker sound from entering the microphone while maintaining a compact and simple overall device structure suitable for downsizing.
Data Source
AI summary
Portable audio equipment comprising: a housing comprising an acoustic passage that protrudes from one side thereof and has an open one end portion; a partition dividing the acoustic passage into a first acoustic passage and a second acoustic passage; an acoustic output unit for outputting sounds through the first acoustic passage; and inner microphone for collecting sounds through the second acoustic passage; and a control unit inside the housing, controlling the acoustic output unit so as to output sounds, and processing the sound collected through the inner microphone, can more effectively cancel external noise by further including the inner microphone for collecting sounds inputted through the body of a user.