Inclined Speaker Array for Height Channel Sound Pressure
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Solution Overview
Problem
Existing speaker array apparatuses face challenges in ensuring sufficient sound pressure and directivity for height channels, as sound pressure decreases when outputting sound beams at elevation angles, leading to inadequate sound field expression.
Innovation Solution
The speaker array apparatus is designed with speakers disposed on an inclined or curved array plane to increase sound pressure towards the ceiling surface while reducing sound pressure in the horizontal direction, using a sound-suppression member and horn configurations to enhance sound beam orientation and directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If speakers are disposed on a vertical array plane to output sound beams at elevation angles for height channels, then sound field expression in vertical direction is improved, but sound pressure decreases
Solution Approach 1:
The patent transforms the speaker array from a vertical configuration to an inclined configuration, changing the spatial dimension of sound beam output. By inclining the array plane at a specific angle (30-60 degrees), the system directs sound beams toward the ceiling surface, utilizing the vertical dimension for reflection-based height channel expression while maintaining adequate sound pressure through optimized projection geometry
Solution Approach 2:
The patent changes the critical parameter of array plane orientation from vertical to inclined. By adjusting the inclination angle within the optimal range of 30-60 degrees, the system optimizes the balance between sound pressure maintenance and height channel effectiveness, creating a parameter-driven solution that resolves the contradiction between sound pressure and vertical sound field expression
2Adaptability or versatility
If sound beams are directed towards ceiling surface for height channel expression, then vertical sound field quality is improved, but horizontal sound pressure distribution becomes unbalanced
Solution Approach 1:
The patent applies local quality by creating different sound pressure characteristics in different spatial directions. The inclined array plane configuration provides enhanced sound pressure toward the ceiling surface for height channel expression, while simultaneously maintaining appropriate horizontal sound pressure distribution through the specific inclination angle, achieving directionally differentiated 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
This configuration effectively increases sound pressure to the ceiling surface and reduces horizontal sound pressure, improving the quality of sound field expression for height channels by optimizing sound beam distribution and directivity.
Implementation Method 1
a speaker array apparatus which uses a technology which strengthens acoustic energy in the vicinity of a focal point by in-phase adding, and as a result, makes a sound beam having strong directivity in the direction of the focal point
Implementation Method 2
by in-phase adding... makes a sound beam having strong directivity
Implementation Method 3
can make the sound beams related to each channel reach a listening position from various directions by reflecting each of the sound beams related to the multi-channel at a wall surface of an installation space
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A speaker array apparatus includes an apparatus housing having a disposition plane, and a speaker array which includes a plurality of speakers disposed at least in a vertical direction on the disposition plane of the apparatus housing that is opposite to a listening position. The speaker array apparatus receives and distributes a sound signal input from an outside to all of or a part of the speakers of the speaker array, and outputs the distributed sound signal as a sound beam by controlling an output timing of each sound output from the all or part of the speakers. Each speaker of the speaker array has an appropriate output direction in an elevation angle, the appropriate output direction indicating a direction having largest sound pressure in a sound pressure distribution when the sound is output from the speaker.