Audio Speaker Casing Stiffener with Ribbed Vibration Damping
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Solution Overview
Problem
Existing acoustic speaker enclosures suffer from parasitic noise due to vibrations caused by loudspeaker movements, which existing solutions like Document FR 2 746 246 A1 do not adequately address.
Innovation Solution
A stiffening part is integrated inside the enclosure, comprising a connecting portion and damping supports with ribs and damping devices to limit vibrations, shifting resonance frequencies outside the loudspeaker's range and reducing parasitic noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the enclosure box is made flexible to accommodate loudspeaker movements, then the loudspeaker can operate freely, but vibrations and parasitic noise increase significantly
Solution Approach 1:
The stiffening part is divided into multiple functional segments: a connecting portion that links opposite internal walls, damping supports with receiving spaces for vibration isolation, and ribs distributed around the receiving space for localized stiffening. This segmentation allows each component to address specific vibration issues while maintaining overall loudspeaker operation freedom.
Solution Approach 2:
The stiffening part combines rigid structural elements (connecting portion and ribs for stiffening) with flexible damping elements (damping supports and receiving spaces for vibration isolation). This composite structure simultaneously provides mechanical support and vibration damping, resolving the contradiction between structural rigidity and operational flexibility.
2Object-generated harmful factors
If damping devices are added to limit vibrations, then parasitic noise is reduced, but the device complexity increases
Solution Approach 1:
The stiffening part merges multiple functions into a single integrated component: structural stiffening (connecting portion), vibration damping (damping supports with damping devices), and spatial organization (ribs defining receiving spaces). This consolidation reduces the number of separate parts and assembly steps, limiting complexity increase while achieving effective vibration control.
Solution Approach 2:
The stiffening part serves multiple purposes simultaneously: it stiffens the enclosure box, provides mounting structures for damping devices, defines receiving spaces for vibration isolation, and connects opposite internal walls. This multi-functionality reduces the need for additional separate components, thereby limiting device complexity.
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 stiffening part effectively reduces vibrations and parasitic noise by moving resonance frequencies beyond the loudspeaker's operational range, significantly minimizing noise levels.
Implementation Method 1
at least one damping support defining a receiving space arranged to receive a damping device intended to limit vibrations of the loudspeaker
Implementation Method 2
the damping support comprising a plurality of ribs distributed around the receiving space, each rib extending in a separate plane parallel to a depth of the receiving space
Data Source
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AI summary
A stiffening part (25) arranged to be integrated into the interior of a casing (12) of an audio speaker (11) in order to stiffen said casing, the audio speaker also being capable of comprising at least one loudspeaker (18a) mounted on a first face (14) of the casing, the stiffening part comprising a connecting portion, at least one damping support defining a receiving space arranged to receive a damping device (40a) intended to limit vibrations of the loudspeaker, wherein the damping support comprises a plurality of ribs (34) distributed around the receiving space (31), each rib extending in a distinct plane parallel to a depth of the receiving space, the stiffening part being arranged such that, when the enclosure (11) is assembled, the connecting portion interconnects inner walls of a second face (15) of the casing and a third face (16) of the casing opposite each other and both perpendicular to the first face (14), the damping device being positioned in the receiving space, and a rear portion of the loudspeaker abutting the damping device.