Sound Output Device With Equalizer Partitioning Acoustic Spaces
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Solution Overview
Problem
Existing sound output devices, such as headphones and earphones, face challenges in improving sound quality and enhancing noise canceling performance due to the different sound output bands of multiple speaker units and the need for dedicated spaces and separate components for these units.
Innovation Solution
A sound output device configuration that includes a housing with separate spaces for a feedback microphone and first speaker unit, a second speaker unit in a conduction space, and an equalizer partitioning these spaces, allowing for improved noise canceling by preventing sound interference and reducing the need for dedicated spaces and separate components, while optimizing the use of the sound guide tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple speaker units with different sound output bands are provided in a housing, then broadband sound output quality is improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent combines multiple speaker units with different sound output bands (first speaker unit for low frequencies, second speaker unit for high frequencies) into a single integrated housing structure. The housing contains both speaker units along with the feedback microphone and equalizer in a unified design, merging multiple functional components into one device to achieve broadband sound output while managing structural complexity.
Solution Approach 2:
The housing is divided into distinct spaces: a first space containing the feedback microphone and first speaker unit, and a second space containing the second speaker unit. The equalizer partitions these spaces to prevent sound interference. This segmentation allows each component to be optimally positioned while maintaining overall integration, resolving the contradiction between quality and complexity.
2Reliability
If a feedback microphone is provided for noise canceling function, then noise canceling performance is improved, but sound from speaker units may interfere with the feedback microphone input
Solution Approach 1:
The housing is segmented into a first space containing the feedback microphone and first speaker unit, and a second space containing the second speaker unit. The equalizer acts as a partition between these spaces, physically separating the feedback microphone from the second speaker unit to prevent sound interference while maintaining the noise canceling function.
Solution Approach 2:
The equalizer serves as an intermediary component that partitions the first space and second space. It prevents sound from the second speaker unit from directly entering the feedback microphone while allowing the noise canceling function to operate effectively. This intermediary structure resolves the interference issue without compromising noise canceling performance.
3Object-affected harmful factors
If separate spaces are formed for different speaker units and feedback microphone, then sound interference is reduced, but the device size and component count increase
Solution Approach 1:
The patent merges the first speaker unit, second speaker unit, feedback microphone, and equalizer into a single integrated housing structure. While separate spaces are created within the housing to prevent sound interference, all components share the same overall device volume, achieving spatial separation without proportionally increasing total device size.
Solution Approach 2:
The feedback microphone and first speaker unit are nested within the first space, while the second speaker unit occupies the second space. The equalizer partitions these nested spaces efficiently. This nested arrangement allows multiple components to coexist in a compact configuration, reducing the overall device volume while maintaining separate acoustic spaces.
Data Source
AI summary
The present invention includes: a housing that includes an arrangement case in which an internal space is formed, and a sound guide tube in which a sound conduction space is formed; a feedback microphone to which an external sound is input; a first speaker unit that outputs a sound; and a second speaker unit that outputs a sound in an output band different from an output band of the sound output from the first speaker unit. The housing has inside a first space and a second space, the feedback microphone and the first speaker unit are arranged in the first space, the second speaker unit is arranged in the second space, and an equalizer that partitions the first space and the second space is disposed between the first speaker unit and the second speaker unit.