Speaker Resonant Passage Structure for Slot-Loading Interference
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Solution Overview
Problem
Existing slot loading loudspeakers suffer from sound wave interference within the enclosure, leading to distorted amplitude spectrum characteristics and deteriorated sound quality, and prior solutions like parametric equalizers consume excessive energy and computational resources.
Innovation Solution
A speaker apparatus with a housing containing a transducer and an acoustic structure featuring resonant passages and a buffer section, utilizing acoustic meta-materials to control sound wave interference and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a slot loading loudspeaker with a thinly designed sound radiation opening is used, then the size of the speaker apparatus is reduced, but the sound waves reflected inside the enclosure and radiated are mutually reinforced and/or offset, resulting in distorted amplitude spectrum characteristics and deteriorated sound quality
Solution Approach 1:
The patent introduces an acoustic structure as an intermediary element between the transducer and the sound radiation opening. This acoustic structure includes resonant passages that act as mediators to control and manage the sound waves, preventing direct interference between reflected and radiated sound waves while maintaining the compact size of the speaker apparatus.
Solution Approach 2:
The patent converts the harmful sound wave reflections into beneficial effects by designing resonant passages that utilize the reflected sound waves to create resonance at specific frequencies. This resonance effect cancels out the harmful interference patterns and improves sound quality, turning the previously harmful reflected waves into useful acoustic energy.
2Object-generated harmful factors
If a parametric equalizer is used to adjust the frequency of sound waves, then the amplitude spectrum characteristics are improved, but large consumption of electric energy and excessive load at the computational resource level occur
Solution Approach 1:
The patent replaces the electronic computational system (parametric equalizer) with an acoustic mechanical system (resonant passages). Instead of using electronic circuits to process and equalize sound frequencies, the invention uses purely acoustic structures with resonant passages that physically manage sound wave interference through resonance and reflection mechanisms, eliminating the need for continuous electronic computation and energy consumption.
Solution Approach 2:
The acoustic structure performs self-service by automatically managing sound wave interference through its resonant passages. The system uses the natural resonance properties of the passages to cancel harmful frequencies and enhance desirable ones without requiring external electronic control or energy input, making the sound quality improvement passive and self-regulating.
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 solution effectively absorbs and attenuates specific frequency sound waves, improving sound quality by reducing interference and maintaining consistent amplitude spectrum, while being energy-efficient.
Implementation Method 1
an acoustic structure inside the housing and including a plurality of resonant passages, each resonant passage of the plurality of resonant passages having an opening facing toward the transducer so that the sound waves enter the opening and travel along the resonant passage
Implementation Method 2
The acoustic structure may be an acoustic meta-material (AMM)
Data Source
AI summary
A speaker apparatus may include a housing; a transducer inside the housing and configured to generate sound waves; and an acoustic structure inside the housing and including a plurality of resonant passages, each resonant passage of the plurality of resonant passages having an opening facing toward the transducer so that the sound waves enter the opening and travel along the resonant passage.