Full-Range Acoustic Resonator Eliminating Crossover Filters
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Solution Overview
Problem
Traditional loudspeakers require multiple speakers and crossover filters, leading to energy losses, distortions, and inefficient sound reproduction due to the separation of frequencies and the use of enclosures that interfere with speaker operation.
Innovation Solution
A high-efficiency, full-range acoustic resonator using a single speaker placed within a tapered nozzle connected to a wind instrument, eliminating the need for crossover filters and enclosures, allowing direct signal transmission from the audio amplifier and utilizing the acoustic properties of wind instruments to enhance frequency reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple speakers and crossover filters are used to cover different frequency ranges, then frequency coverage is improved, but energy losses and distortions increase
Solution Approach 1:
The patent merges multiple frequency coverage functions into a single full-range speaker driver, eliminating the need for separate bass, mid-range, and tweeter speakers. This consolidation removes the energy losses associated with crossover filters and multiple drivers while maintaining comprehensive frequency coverage from 20Hz to 20kHz through the speaker's inherent full-range capability
2Measurement precision
If crossover filters are used to separate frequencies for each speaker, then frequency separation is improved, but signal distortion and energy losses increase
Solution Approach 1:
The patent extracts and eliminates the crossover filter component from the traditional multi-speaker system. By removing this intermediary device, the full audio signal passes directly to the single full-range speaker without the phase shifts, amplitude variations, and signal degradation that crossover filters inherently introduce, thereby preserving signal integrity while maintaining frequency separation through the speaker's natural response
3Ease of manufacture
If traditional loudspeaker enclosures are used to accommodate speakers, then speaker protection is improved, but acoustic interference and operational efficiency deteriorate
Solution Approach 1:
The patent introduces an acoustic horn as an intermediary structure between the speaker driver and the surrounding environment. This horn serves as both protective housing and acoustic enhancement device, guiding and amplifying sound waves while protecting the speaker cone. The horn's flared geometry improves acoustic efficiency by matching acoustic impedance and directing sound energy, eliminating the need for traditional enclosed boxes that trap and interfere with acoustic waves
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 solution enables high-definition sound reproduction across a wide frequency range with reduced energy losses and distortions, improving the overall efficiency and quality of sound by aligning speaker cone movements with the acoustic resonance of the system.
Implementation Method 1
The dynamic speaker is an electroacoustic transducer, as its function is to transform electrical energy from an audio amplifier into acoustic energy perceivable by the human ear
Implementation Method 2
utilizing the acoustic properties of wind instruments to enhance frequency reproduction
Data Source
AI summary
The present invention relates to a high-efficiency, full range acoustic resonator that functions as a high musical definition loudspeaker. It does not require electrical filters (crossover filters). The electrical signal from the amplifier directly passes to a single speaker, without energy losses and added distortions. Further, the acoustic resonator of the present invention does not require a loudspeaker enclosure to accommodate the speakers.