Loudspeaker Sound Guide with Variable Diameter Openings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional loudspeakers require multiple omni-directional units arranged in a line to achieve directional sound output, which is costly and inefficient for implementing stereophonic sound fields in indoor spaces.
Innovation Solution
A loudspeaker design featuring a sound guide part with variable-sized openings along its longitudinal direction, increasing in diameter non-linearly, and optionally including protrusion members for enhanced frequency sensitivity and directivity, allowing for directional sound wave output without the need for multiple units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple omni-directional loudspeakers are arranged in a line to achieve directional sound output, then directional sound output and stereophonic sound field can be implemented, but the cost increases and the system becomes complex
Solution Approach 1:
The sound guide part is divided into multiple sections along its longitudinal direction, with each section containing openings of different diameters. This segmentation allows different frequency ranges to be directed effectively, achieving directional sound output with a single loudspeaker unit rather than multiple units
Solution Approach 2:
The patent transitions from arranging multiple loudspeakers in a linear spatial arrangement to creating directional control within a single loudspeaker by varying opening diameters along the longitudinal dimension of the sound guide part. This dimensional approach to frequency-based directionality reduces system complexity
2Reliability
If multiple omni-directional loudspeakers are used to achieve directional sound output, then stereophonic sound field can be implemented, but the cost increases
Solution Approach 1:
The sound guide part with variable diameter openings serves multiple functions simultaneously: it directs sound waves in specific directions, separates different frequency ranges through geometric diffraction, and creates stereophonic sound fields. This multi-functionality eliminates the need for multiple specialized loudspeaker units
Solution Approach 2:
The patent combines the functions of multiple loudspeakers (directional control, frequency separation, and stereophonic output) into a single loudspeaker unit with a specially designed sound guide part. The variable diameter openings integrate these functions that would otherwise require separate components
3Reliability
If a sound guide part with variable opening diameters is used, then directivity and sensitivity are improved, but the manufacturing complexity increases
Solution Approach 1:
The patent varies the diameter parameter of openings along the longitudinal direction of the sound guide part to optimize directivity and sensitivity for different frequency ranges. This parameter variation is designed to follow geometric progression ratios, providing mathematical simplicity that facilitates manufacturing while achieving superior acoustic performance
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 improves directivity and sensitivity of sound output, reducing costs by concentrating sound waves in a specific direction while maintaining sensitivity across various frequency bands, thus enhancing the auditory experience without the need for multiple loudspeakers.
Implementation Method 1
an acoustic transducer configured to generate a sound wave
Implementation Method 2
a sound guide part configured to directionally output the sound wave via a plurality of openings. A diameter of each of the plurality of openings may be increased as a distance from the acoustic transducer increases
Data Source
AI summary
A sound outputting apparatus is provided. The sound outputting apparatus includes at least one loudspeaker, and a main body configured to house the at least one loudspeaker. Each of the at least one loudspeaker includes an acoustic transducer configured to generate a sound wave, and a sound guide part configured to directionally output the sound wave via a plurality of openings. A diameter of each of the plurality of openings is increased as a distance from the acoustic transducer increases.