Two-way Receiver Bass Duct for Frequency Interference
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Solution Overview
Problem
Existing two-way speaker systems face issues with frequency interference and sound pressure deterioration due to the overlap of sound ranges between woofer and tweeter speakers, particularly in the low frequency range, which limits the effectiveness of active noise cancellation (ANC) technology.
Innovation Solution
A two-way receiver design incorporating a bass duct that blocks middle and high-frequency sounds from the woofer speaker, allowing only low-frequency sounds to be emitted, thereby preventing frequency interference and enhancing sound pressure, while increasing space utilization through the strategic placement of the bass duct on the outer periphery of the first speaker unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a two-way driver unit is adopted to improve low frequency sound pressure, then sound quality in low frequency range is improved, but frequency interference and sound pressure deterioration occur due to overlap between woofer and tweeter speakers
Solution Approach 1:
The patent segments the sound emission paths by introducing a bass duct that separates the low-frequency sound output from the general sound emission area. The bass duct is specifically configured to emit only low-frequency sounds from the woofer speaker, preventing overlap and interference with the tweeter speaker's high-frequency output.
Solution Approach 2:
The patent extracts the low-frequency sound emission function from the general speaker output by creating a dedicated bass duct. This duct is formed by removing a specific portion of the frame and yoke structure, allowing low-frequency sounds to be channeled separately through a designated path that does not interfere with other frequency ranges.
2Object-generated harmful factors
If a bass duct is introduced to block middle and high frequency sounds, then frequency interference is reduced, but device complexity increases
Solution Approach 1:
The bass duct is merged with the existing frame and yoke structures rather than being a completely separate component. The duct utilizes the natural geometry of the frame's open top portion and the yoke's cylindrical shape, combining multiple functions into integrated structural elements to minimize additional complexity.
Solution Approach 2:
The frame and yoke structures serve multiple functions: they provide mechanical support for the speakers, define the bass duct pathways, and simultaneously create the acoustic separation needed to prevent frequency interference. This multi-functionality reduces the need for additional dedicated components.
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 bass duct effectively reduces frequency interference and enhances sound pressure in the low-frequency range, improving the ANC technology's effectiveness by amplifying low-frequency sound pressure and minimizing high-frequency noise, thus optimizing sound quality and system performance.
Implementation Method 1
a bass duct formed on an outer periphery of the first speaker unit and having a sound emission hole emitting a sound of the first speaker unit emitted to the communication hole of the yoke to a position spaced apart from the communication hole
Implementation Method 2
a first speaker unit installed above the yoke and including a first permanent magnet, a first plate, a first voice coil, and a first diaphragm
Implementation Method 3
a first speaker unit installed above the yoke and including a first permanent magnet, a first plate, a first voice coil, and a first diaphragm
Implementation Method 4
a first speaker unit installed above the yoke and including a first permanent magnet, a first plate, a first voice coil, and a first diaphragm
Data Source
AI summary
A two-way receiver includes a cylindrical frame, a yoke dividing an internal space of the frame and including a cylindrical portion, a first flange portion formed at an outer periphery of the cylindrical portion, a connection wall bent downward from the first flange portion, a second flange portion formed at an outer periphery of the connection wall, and a communication hole formed by deleting a portion of the connection wall and second flange portion. A first speaker unit is installed above the yoke, and a second speaker unit below the yoke. A protector coupled to a lower portion of the frame protects the second speaker. A bass duct formed on an outer periphery of the first speaker unit has a sound emission hole for emitting a sound of the first speaker unit emitted to the communication hole of the yoke to a position spaced apart from the communication hole.