Portable Loudspeaker Battery Nesting and Passive Radiator Integration
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Solution Overview
Problem
Compact portable loudspeakers face challenges in achieving sufficient acoustic volume and surface area for high-quality audio output, while also needing to accommodate a removable battery module and withstand high pressures within the acoustic volume.
Innovation Solution
The design incorporates a housing with a unitary battery module positioned between two passive radiators, which are secured on opposite sides, along with electro-acoustic drivers, to create sound waves and provide electrical power, while energy directors minimize vibration and a robust seal is maintained between drivers and the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If an external acoustic chamber is added to increase acoustic volume, then the frequency response and audio performance are improved, but the device size and weight increase significantly
Solution Approach 1:
The acoustic chamber is nested within the housing structure, with the battery module positioned inside the acoustic chamber volume. This allows the acoustic volume to be created without adding external volume to the device, as the battery serves dual purposes: power supply and acoustic chamber filling.
Solution Approach 2:
The battery module serves multiple functions: providing electrical power to the electro-acoustic driver and simultaneously occupying the acoustic chamber volume to prevent pressure dampening. This multi-functionality eliminates the need for separate acoustic chamber structures that would increase device size.
2Volume of stationary object
If the acoustic chamber volume is increased to reduce pressure dampening, then the loudspeaker performance is improved, but the device becomes larger and less portable
Solution Approach 1:
The acoustic chamber is nested within the housing structure, with the battery module positioned inside the acoustic chamber volume. This allows the acoustic volume to be created without adding external volume to the device, as the battery serves dual purposes: power supply and acoustic chamber filling.
3Reliability
If passive radiators are added to acoustically energize sound output, then the audio quality and bass response are improved, but the device complexity and surface area increase
Solution Approach 1:
The passive radiators are integrated into the housing structure as flat panels on opposite sides, merging the radiating surface with the device外壳. This eliminates the need for separate radiating components while maintaining the acoustic energization function.
Solution Approach 2:
The passive radiators utilize the flat surfaces of the housing in a different dimensional arrangement, converting the housing walls into radiating surfaces. This approach maintains audio quality without increasing the device's external dimensions.
4Strength
If the housing is made robust to withstand high pressures, then the structural integrity is improved, but the device weight and manufacturing complexity increase
Solution Approach 1:
The housing is designed with localized reinforcement only at critical pressure points where high internal pressure occurs, rather than uniformly thickening the entire housing. This maintains structural integrity while minimizing additional weight.
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 configuration allows for a compact, high-quality audio output with reduced size and weight, effective acoustic energization of passive radiators, and robust sealing to handle internal pressures, enhancing the loudspeaker's performance and usability.
Implementation Method 1
a first electro-acoustic driver which creates sound waves when operated
Implementation Method 2
the sound waves from the driver being capable of acoustically energizing the first and second passive radiators
Data Source
AI summary
A loudspeaker includes a first electro-acoustic driver that creates sound waves when operated, and a housing. A first baffle is coupled to the housing and the first electro-acoustic driver. A first speaker grille covers the first electro-acoustic driver. A first gasket is disposed between the first baffle and the first speaker grille. The first gasket comprises a first set of energy directors to reduce buzzing between the first gasket and the first baffle.