Projector Speaker Asymmetry for Uniform Sound Distribution
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Solution Overview
Problem
Conventional projectors with speakers disposed on the back side suffer from limited sound quality at the front side due to the directional output of speakers, restricting audience placement and space utilization, especially in small spaces where sound quality is crucial.
Innovation Solution
The projector design features speakers with output surfaces tilted between 45 degrees and 90 degrees relative to the rear side wall, allowing sound waves to spread more evenly across the horizontal axis, creating a balanced acoustic field that improves sound quality throughout the viewing area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the speaker output surface is tilted within 45 degrees toward the lateral side with reference to the back side, then high sound quality is obtained in the back side area, but sound propagation at the front side becomes difficult and sound quality deteriorates
Solution Approach 1:
The speaker output surfaces are tilted asymmetrically at angles greater than 45 degrees toward the lateral sides, deviating from the conventional symmetric 45-degree configuration. This asymmetric tilt redirects sound propagation toward the front side while maintaining back side coverage, resolving the contradiction between optimized back side sound quality and front side sound propagation.
2Reliability
If the speaker output surface is tilted within 45 degrees toward the lateral side, then sound quality is optimized at the back side, but the use of space is limited and audience placement is restricted
Solution Approach 1:
By tilting the speaker output surfaces at asymmetric angles greater than 45 degrees toward the lateral sides, the sound propagation pattern is modified to cover both front and back areas effectively. This expands the usable space and allows flexible audience placement throughout the room, not just at the back side.
3Reliability
If speakers are disposed on the back side with output surfaces tilted within 45 degrees, then high sound quality is obtained in the back side area, but sound distribution at the front side becomes insufficient
Solution Approach 1:
The asymmetric tilt angle configuration of the speaker output surfaces, greater than 45 degrees toward the lateral sides, redirects sound energy distribution to achieve better coverage at the front side while preserving back side sound quality, thus improving overall sound distribution throughout the space.
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 enhances sound quality across a broader range, enabling better audience placement flexibility and improved sound distribution even in confined spaces by ensuring sound waves reach the audience more uniformly.
Implementation Method 1
a first output surface configured to output a sound wave in the first speaker tilts toward the third wall part in an angle range larger than 45 degrees and smaller than 90 degrees with reference to the second wall part
Data Source
AI summary
A projector includes a housing having a first wall part facing a projection target surface, a second wall part facing an opposite side to the first wall part, a third wall part and a fourth wall part facing respective sides opposite to each other, a first speaker disposed in a first corner part of the housing, and a second speaker disposed in a second corner part of the housing, wherein a first output surface for outputting a sound wave in the first speaker tilts toward the third wall part in an angle range larger than 45 degrees and smaller than 90 degrees with reference to the second wall part, and a second output surface for outputting a sound wave in the second speaker tilts toward the fourth wall part in an angle range larger than 45 degrees and smaller than 90 degrees with reference to the second wall part.