Portable Amplifier with Passive Radiator for Low-Fidelity Sound
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Solution Overview
Problem
Conventional amplification systems for musical instruments are bulky, heavy, and require an external power supply, limiting their portability and autonomy, especially when used in live performances and environments without access to the electricity grid, while also compromising on sound quality and frequency response, especially at low frequencies.
Innovation Solution
A transportable sound reinforcement apparatus with a sealed acoustic box and passive radiator configuration, equipped with a power amplifier stage and energy storage system, allowing for efficient amplification and extended autonomy without an external power source, while maintaining high sound quality and compact dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional amplification systems are designed to reproduce low frequencies with high volume, then sound quality and frequency response are improved, but the apparatus becomes bulky and heavy
Solution Approach 1:
The system separates the amplification function into two distinct components: a compact portable amplifier unit that processes and transmits the audio signal, and a separate passive radiator speaker that reproduces the sound. This segmentation allows the amplifier to remain lightweight and portable while the sound reproduction function is handled by the passive radiator, which requires no heavy power amplification stage.
Solution Approach 2:
The patent introduces an intermediary transmission medium (radio frequency signal or wired connection) between the amplifier and the passive radiator. This intermediary allows the audio signal to be transmitted without requiring the amplifier to be physically connected to or integrated with the speaker, enabling the separation of weight-bearing functions while maintaining signal integrity.
2Power
If amplification systems are designed for high power output, then sound volume is improved, but the apparatus requires external power supply and loses portability
Solution Approach 1:
The system divides the power requirements into two parts: the portable amplifier unit that consumes minimal power for signal processing and transmission, and the passive radiator that requires no electrical power for sound production. This segmentation enables the amplifier to remain portable with battery operation while still achieving high sound power output through the passive radiator.
Solution Approach 2:
The patent uses radio frequency transmission or wired signal transmission as an intermediary to carry the audio signal from the portable amplifier to the passive radiator. This intermediary allows the separation of the low-power amplifier from the high-power sound reproduction function, enabling portability while maintaining high output power capability.
3Ease of operation
If amplification systems are designed for extended autonomy without external power, then portability is improved, but sound volume and low frequency reproduction are compromised
Solution Approach 1:
The system separates the low-power signal processing function (portable amplifier) from the high-power sound reproduction function (passive radiator). The portable amplifier with battery operation provides extended autonomy for signal processing, while the passive radiator delivers high sound power output without requiring electrical power, thus resolving the contradiction between portability and sound power.
Solution Approach 2:
The intermediary signal transmission mechanism (radio frequency or wired connection) enables the portable amplifier to control the passive radiator from a distance, allowing the amplifier to remain lightweight and battery-operated while the passive radiator provides high power output independent of the amplifier's power constraints.
4Volume of moving object
If amplification systems are designed for compact dimensions, then portability is improved, but frequency response and sound quality are compromised
Solution Approach 1:
The system separates the compact amplifier unit from the passive radiator speaker, allowing the amplifier to be small and portable while the passive radiator can be optimally sized for frequency response. The segmentation enables the sound reproduction component to have the necessary volume for proper acoustic performance without constraining the amplifier's portability.
Solution Approach 2:
The intermediary signal transmission allows the compact amplifier to control a larger passive radiator from a distance, enabling the amplifier to maintain compact dimensions for portability while the passive radiator provides adequate volume for proper frequency response and sound quality.
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 apparatus achieves high sound volume with minimal weight and size, providing extended autonomy and versatility in signal processing, enabling musicians to perform anywhere with high-quality sound reproduction across a wide frequency spectrum.
Implementation Method 1
at least a second diaphragm, called passive radiator (12), which reproduces sounds at low frequencies without being served by a magnetic field
Implementation Method 2
at least one electrodynamic speaker diaphragm (11), which reproduces mid and high frequencies
Implementation Method 3
The apparatus is equipped with an energy storage system that provides extended autonomy
Data Source
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AI summary
A transportable apparatus for the high-efficiency sound reinforcement of audio signals comprising an electrodynamic loudspeaker and a passive radiation diaphragm, with small size and weight, suitable to be lifted and transported easily from single person, powered by an energy group in order to reproduce the signal of musical instruments such as electric guitar and bass (also electronic keyboards and human voice), ensuring faithful and high-quality reproduction over a very extended frequency spectrum especially at lower frequencies which require more amount of energy, being able to produce a considerable volume power for a certain period of time without having to use the electricity mains, being therefore usable and portable in any place and situation, and able to feed a large number of external and internal signal processing devices such as effect pedals, and including means of lifting and fixing on various surfaces.