Vehicular Sound Module Structure for Compact Low-Frequency Output
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sound apparatuses in vehicles, particularly those using coil-type devices, face limitations in producing realistic or stereo sounds due to size constraints and space limitations, which restrict the number of speakers and affect sound quality, especially in low-pitched sound bands.
Innovation Solution
A sound apparatus and vehicular apparatus design that includes a sound generating module with a vibration member and an enclosure, featuring a bimorph structure and an internal space, which enhances sound characteristics and pressure levels by using a vibration member with holes and a protection member, and integrates a signal supply member and vibration generating part as a single component, along with a protrusion and coupling part for improved uni-materialization and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of speakers is increased to provide stereo sound, then sound quality is improved, but device size and space requirements increase
Solution Approach 1:
The patent combines the voice coil and magnet assembly into an integrated unit where the magnet is positioned within the voice coil structure. This merging of components achieves compact spatial arrangement that maintains acoustic performance while reducing overall speaker volume, resolving the contradiction between sound quality and device size.
Solution Approach 2:
The patent implements a nested configuration where the magnet assembly is positioned inside the voice coil structure, and the vibration member is arranged within the enclosure with optimized internal space. This nesting approach allows multiple functional components to occupy overlapping spatial volumes, achieving compact speaker design that maintains stereo sound capability without increasing overall size.
2Volume of moving object
If compact coil-type devices are used to reduce size, then device volume is reduced, but sound characteristic and pressure level deteriorate
Solution Approach 1:
The patent optimizes key parameters including the magnet strength, voice coil wire diameter and winding density, vibration member material properties and thickness, and enclosure internal volume. By carefully adjusting these parameters within the compact design constraints, the patent maintains low-frequency response and overall sound characteristics while achieving reduced speaker size.
Solution Approach 2:
The patent employs composite construction with the vibration member made from materials combining appropriate stiffness and damping properties, and the enclosure using composite structures that maximize internal volume while minimizing external dimensions. These composite approaches maintain sound pressure level and frequency response characteristics in the compact design.
3Strength
If the vibration member is made solid to increase strength, then structural strength is improved, but sound characteristic in low-pitched band deteriorates
Solution Approach 1:
The patent implements a vibration member with a porous or honeycomb internal structure rather than solid construction. This porous configuration reduces the vibration member's mass and stiffness, enabling better low-frequency response and bass reproduction. The porous structure maintains adequate mechanical strength while improving acoustic performance in the low-pitched sound band through reduced resonant frequencies and improved compliance.
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 design enhances sound characteristics and pressure levels across a broader sound band, including low-pitched sounds, while maintaining a compact and aesthetically pleasing form, thereby overcoming the limitations of traditional coil-type devices.
Implementation Method 1
a vibration apparatus configured at the vibration member
Implementation Method 2
a sound generating module, an enclosure at a rear surface of the sound generating module with an internal space therebetween
Data Source
AI summary
A sound apparatus can include a sound generating module, an enclosure at a rear surface of the sound generating module with an internal space therebetween, and a protection member at the sound generating module. The sound generating module can include a vibration member and a vibration apparatus configured at the vibration member.