Dual Diffuser Speaker Diaphragm for Acoustic Distortion Reduction
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Solution Overview
Problem
Conventional speakers suffer from low efficiency due to acoustic short circuit and sound distortion, resulting in wasteful energy conversion and high costs, as substantial sound energy is cancelled or converted to vibration, leading to inefficient sound production.
Innovation Solution
The speaker design incorporates a diaphragm with an active and stabilizing portion connected via a hinge mechanism, allowing independent movement, where the active portion oscillates due to magnetic interaction, and the stabilizing portion moves off-phase to create sound, maintaining a constant air volume and reducing distortions, potentially eliminating the need for heavy enclosures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy and expensive enclosure cabinets are used to mitigate acoustic short circuit and sound distortion, then sound quality is improved, but weight and cost increase significantly
Solution Approach 1:
The patent removes the traditional speaker enclosure cabinet entirely, using only a mounting bracket to hold the driver assembly. The dual diffuser design with opposing phases inherently prevents acoustic short circuit and distortion without requiring heavy enclosure walls, thus eliminating unnecessary weight while maintaining sound quality.
Solution Approach 2:
The patent converts the harmful acoustic short circuit effect into a beneficial dual-phase output system. By designing two diffusers that move in opposite phases, the system uses what would traditionally be considered acoustic interference to create two separate, useful sound outputs while canceling out distortions.
2Reliability
If heavy and expensive enclosure cabinets are used to mitigate acoustic short circuit and sound distortion, then sound quality is improved, but manufacturing cost increases
Solution Approach 1:
The patent eliminates the expensive enclosure cabinet from the design, replacing it with a simple mounting bracket. This extraction of unnecessary components dramatically reduces material costs and manufacturing complexity while the dual diffuser design maintains acoustic performance.
Solution Approach 2:
The patent replaces expensive, complex enclosure structures with simple, inexpensive mounting brackets and open-frame constructions. The design philosophy embraces minimalism, using only the essential components needed for function rather than expensive over-engineered solutions.
3Device complexity
If conventional single diffuser design is used, then device simplicity is maintained, but energy efficiency remains low due to acoustic short circuit and vibration losses
Solution Approach 1:
The patent divides the single diffuser into two separate diffusers (first and second diffusers) that operate in opposite phases. This segmentation allows each diffuser to efficiently convert electrical energy to acoustic energy without the energy losses that occur in single-diffuser systems due to acoustic short circuit and unwanted vibrations.
Solution Approach 2:
The patent introduces asymmetry by having the two diffusers move in opposite phases rather than in unison. This asymmetric operation pattern creates complementary acoustic outputs that reinforce each other while canceling out destructive interference and energy-wasting vibrations.
4Device complexity
If conventional speaker design with single diffuser is used, then device simplicity is maintained, but frequency range is limited requiring additional components
Solution Approach 1:
The patent makes the single speaker unit perform multiple frequency ranges by using two diffusers that can operate across different frequency bands. The opposing phase design allows one diffuser to handle certain frequencies while the other handles complementary frequencies, providing wide frequency coverage without requiring separate speakers or complex crossover networks.
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
This design enhances sound quality and energy efficiency, increasing speaker efficiency to 15% or more, reduces the need for additional components like amplifiers and enclosures, and allows a broader frequency range, resulting in cost-effective and lighter speakers with minimal distortion.
Implementation Method 1
The interaction between the magnets causes the inner component to oscillate back and forth according to the electrical signal provided
Implementation Method 2
the movement of the active portion causes air pressure changes within an enclosure and/or surrounding environment which in turn causes the stabilizing portion to move and thus create sound
Data Source
AI summary
An improved loudspeaker is disclosed. The speaker includes at least one permanent magnet, an electromagnet and a diaphragm. The diaphragm has an inner portion (active portion) and an outer portion (stabilizing portion) that are both typically ring-shaped. The interaction between the magnets causes the inner portion to move back and forth according to the electrical signal inputted. As the inner portion moves forward, the outer portion tends to move backward relative to the inner portion. The movement of the active portion tends to produce corresponding forces on the stabilizing portion that cause the stabilizing portion to move and create sound in a symbiotic fashion. In certain embodiments, the portions move relative to each other as sound is produced so that a relatively constant volume of air is displaced on either side of the diaphragm thus minimizing acoustic distortion. The inner portion may be connected to the outer portion via a hinge and/or flexible material which allows the portions to move relative to each other.