Slot-Loading Loudspeaker Gap Blocking for Acoustic Interference
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Solution Overview
Problem
In slim electronic devices with slot loading loudspeakers, acoustic signals are distorted due to reflection from the panel, leading to reduced sound quality.
Innovation Solution
A speaker apparatus with a housing, slot loading loudspeaker, and a panel member, featuring a gap and blocking members to prevent acoustic signal inflow into the gap, using materials like acoustic meta materials to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a panel member is coupled to the front surface of a slot loading loudspeaker to enhance aesthetic sensibility, then appearance is improved, but acoustic signal distortion occurs due to reflection from the panel
Solution Approach 1:
A gap is introduced between the panel member and the cover as an intermediary space. This gap allows acoustic signals to pass through without being reflected by the panel member, thereby maintaining both aesthetic appearance and sound quality. The gap acts as a mediator that prevents direct contact between the acoustic path and the reflective panel surface.
2Volume of moving object
If the size of a slot loading loudspeaker is reduced to accommodate slimmer electronic devices, then device thickness is reduced, but acoustic signal interference increases
Solution Approach 1:
The problem is solved by introducing a spatial dimension - a gap - between existing components (panel member and cover). This gap provides an additional acoustic pathway that allows signals to bypass the panel member without requiring changes to the overall speaker size, thus maintaining compact dimensions while improving acoustic signal quality.
3Reliability
If a gap is formed between the cover and panel member to allow acoustic signal passage, then sound quality is improved, but acoustic signal may flow into the gap and cause interference
Solution Approach 1:
Acoustic absorbing material is extracted and placed within the gap to specifically address the harmful acoustic reflections. This material absorbs acoustic signals that enter the gap, preventing them from reflecting back and causing interference, while still allowing the gap to serve its primary function of preventing panel member reflection.
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
Enhances sound quality by reducing interference and optimizing acoustic signal transfer, potentially reducing production costs by eliminating the need for additional components.
Implementation Method 1
at least one of the cover or the panel member includes at least one blocking member for preventing at least a portion of the acoustic signal outputted through the opening from flowing into an inside of the gap
Implementation Method 2
using materials like acoustic meta materials to minimize interference
Data Source
AI summary
A speaker apparatus including a housing; a slot loading loudspeaker inside the housing, the slot loading loudspeaker including a speaker unit, and a cover covering the speaker unit, and including an opening through which an acoustic signal from the speaker unit may be output; and a panel member disposed in a forward direction of the slot loading loudspeaker so that a gap is formed between the cover and the panel member, and an exposure area is formed between an edge of the housing and an edge of the panel member to expose the opening through the exposure area so that an acoustic signal outputted through the opening is transferred to an outside, wherein at least one of the cover or the panel member includes at least one blocking member for preventing at least a portion of the acoustic signal outputted through the opening from flowing into the gap.