Opposed Loudspeaker Basket Structure for Vibration Damping
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Solution Overview
Problem
Loudspeaker arrangements in vehicles experience unwanted noise due to vibrations from loudspeaker membranes and magnets, which are transferred to surrounding elements, degrading the sound experience.
Innovation Solution
A loudspeaker arrangement with opposing loudspeakers connected by elastic cords and projections, forming a cavity with vibrations canceled out by inverse sound signals, and secured within an enclosure using elastic cords and projections to dampen remaining vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If loudspeaker membranes and magnets are used to generate sound, then sound production is achieved, but vibrations are transferred to surrounding elements causing unwanted noise
Solution Approach 1:
The patent applies the principle of converting harmful vibrations into beneficial effects by using elastic cords to couple opposing loudspeakers. The vibrations generated by one loudspeaker are converted into damping forces for the other loudspeaker through the elastic cords, transforming the harmful vibration transmission into a useful vibration cancellation mechanism that improves sound quality while reducing noise.
Solution Approach 2:
The elastic cords serve as intermediary elements between the loudspeaker baskets and the surrounding structure. These cords mediate the vibration transmission by providing a flexible coupling that allows vibration energy to be absorbed and dissipated, preventing direct rigid transmission of vibrations to the housing and surrounding elements.
2Object-generated harmful factors
If loudspeaker baskets are rigidly coupled to eliminate vibrations, then vibration transmission is reduced, but the structure becomes complex requiring multiple connection points and elements
Solution Approach 1:
The patent merges multiple vibration damping functions into a single elastic cord coupling system. Instead of using separate dampers, mounts, and fasteners at multiple connection points, the elastic cords simultaneously provide mechanical coupling, vibration damping, and structural support, significantly simplifying the overall structure while maintaining effective vibration reduction.
Solution Approach 2:
The elastic cords perform multiple functions simultaneously: they mechanically couple the opposing loudspeaker baskets, dampen vibrations through their elastic properties, provide structural support for the loudspeaker assembly, and allow for thermal expansion and contraction. This multi-functionality reduces the need for additional specialized components.
3Stability of the object's composition
If screws are used to secure loudspeaker baskets, then structural stability is achieved, but unwanted clattering noise occurs
Solution Approach 1:
The patent replaces the rigid mechanical screw-fastening system with an elastic cord suspension system. The elastic cords provide the necessary structural stability through their tension and elastic properties while eliminating the rigid contact points that cause clattering noise during vibration, thus substituting a noise-prone mechanical fastening system with a noise-resistant elastic suspension system.
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
Reduces vibrations and noise transmission to surrounding parts, enhancing sound quality by canceling out vibrations and damping residual motion, while eliminating the need for screws and reducing unwanted clattering.
Implementation Method 1
The first point of contact is configured to accommodate a first elastic cord, wherein the first elastic cord, when arranged on the first point of contact, forms a closed loop
Implementation Method 2
each of the at least one additional point of contact is configured to accommodate a second elastic cord and a third elastic cord such that each of the second elastic cord and the third elastic cord, when arranged on the respective additional point of contact, form a closed loop
Implementation Method 3
forming a cavity with vibrations canceled out by inverse sound signals
Data Source
AI summary
A loudspeaker arrangement comprises a first loudspeaker comprising a first sound radiating surface and a first speaker basket, and a second loudspeaker comprising a second sound radiating surface and a second speaker basket. The first loudspeaker and the second loudspeaker are arranged opposite each other in a first direction. A cavity is formed between a front side of the first loudspeaker and a front side of the second loudspeaker. The first loudspeaker basket is directly coupled to the second loudspeaker basket, thereby forming a third projection that defines an opening of the cavity. The third projection forms a first point of contact on a first side of the loudspeaker arrangement. The first loudspeaker basket and the second loudspeaker basket further form at least one additional point of contact at a second side of the loudspeaker arrangement, opposite the first side in a second direction.