Speaker Magnetic Circuit Partitioner for Standing Wave Suppression
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Solution Overview
Problem
Sound quality deteriorates due to standing waves generated in the internal spaces of speaker units, particularly in the magnetic circuits of electrodynamic speakers.
Innovation Solution
Incorporating a partitioner with openings and a sound absorber in the magnetic circuit to partition the internal space into separate regions, including a pipe-resonator filled with a sound absorber, which suppresses standing waves by increasing energy consumption and resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a partitioner is introduced to suppress standing waves, then sound quality is improved, but device complexity increases
Solution Approach 1:
The internal space of the speaker unit is divided into multiple separate spaces using partitioners. These partitioners create distinct acoustic zones that prevent standing waves from forming across the entire space, thereby improving sound quality while adding structural complexity
Solution Approach 2:
Partitioners with openings are introduced as intermediary structures between the voice coil and the magnetic circuit. These partitioners act as acoustic mediators that modify the sound wave propagation paths and suppress standing waves through their geometric configuration and opening patterns
2Stress or pressure
If air communication passage is provided for air communication, then internal space pressure is reduced, but standing wave suppression is insufficient
Solution Approach 1:
Instead of providing a single air communication passage, multiple partitioners with multiple openings are used to create multiple communication channels. This segmentation approach maintains pressure equalization while providing multiple paths that disrupt standing wave patterns through their distributed geometric configuration
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
Effectively reduces standing waves, enhancing sound quality by minimizing energy loss and improving acoustic performance.
Implementation Method 1
when the voice coil in the magnetic gap is energized, the diaphragm is driven so as to perform sound emission
Implementation Method 2
a pipe-resonator filled with a sound absorber, which suppresses standing waves by increasing energy consumption and resonance
Implementation Method 3
a pipe-resonator filled with a sound absorber, which suppresses standing waves by increasing energy consumption and resonance
Data Source
AI summary
A speaker unit includes a yoke, a magnet, a voice coil and a partitioner. The yoke includes a base portion and a protruding portion protruding from the base portion. The magnet is disposed on the base portion. The top plate is disposed on the magnet. A magnetic gap is formed between the top plate and the protruding portion. The voice coil is disposed in the magnetic gap. The partitioner is disposed in a surrounded-space surrounded by the yoke, the magnet and the top plate. The partitioner is spaced apart from the base portion. The partitioner includes at least one opening.