Monolithic Loudspeaker Angular Speaker Arrangement
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Solution Overview
Problem
Traditional monolithic loudspeakers fail to provide an effective stereophonic experience, especially at lower frequencies due to their monolithic nature, resulting in high 'White Noise Gain' and low efficiency.
Innovation Solution
A monolithic loudspeaker design featuring pairs of speakers arranged at an angle with signal delays applied to rear speakers to form directional radiation patterns for left and right channels, utilizing hyperbolic paraboloid diaphragms and additional speakers for frequencies above 2 KHz, and applying monaural signals below 250 Hz to enhance low-frequency reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate beams of left and right sound channels are formed and fed to a speaker array in a traditional monolithic loudspeaker, then the device can provide voice and audio interface services, but the high wavelength-to-array-length ratio at lower frequencies results in very high White Noise Gain and very low efficiency
Solution Approach 1:
The single monolithic loudspeaker is segmented into multiple independent speaker units (first speaker, second speaker, third speaker, fourth speaker) arranged in a specific spatial configuration. Each speaker can be independently controlled to produce sound waves, allowing the system to function as both a monolithic device and a distributed array, thereby resolving the efficiency problem at low frequencies while maintaining versatility
Solution Approach 2:
The invention transitions from traditional planar speaker array arrangements to a three-dimensional spatial configuration where speakers are positioned at different heights and angles. The first and second speakers are arranged along a first axis, while the third and fourth speakers are arranged along a second axis at a different height, creating vertical and angular dimensionality that improves low-frequency radiation efficiency
2Adaptability or versatility
If separate beams of left and right sound channels are formed in a traditional monolithic loudspeaker, then the device can serve as a music and media playback device, but it fails to provide a good stereophonic experience comparable to separated loudspeakers
Solution Approach 1:
The loudspeaker system is divided into multiple independently controllable speaker units that can be assigned to different audio channels. The first and second speakers can be dedicated to one channel while the third and fourth speakers handle the other channel, enabling true multi-channel audio reproduction and preserving stereophonic information that would be lost in a traditional monolithic design
Solution Approach 2:
The invention introduces a control device as an intermediary between the audio source and the speaker array. This control device processes the audio signal and distributes appropriate signals to each speaker unit, enabling sophisticated audio processing including spatial audio, surround sound, and adaptive beamforming that preserves and enhances stereophonic experience
3Volume of moving object
If a monolithic loudspeaker uses a compact cylindrical design with diameter 60-110mm and height 240-450mm, then the device is space-efficient and suitable for modern applications, but the small array length relative to wavelength at low frequencies causes very high White Noise Gain
Solution Approach 1:
The invention exploits the vertical dimension by arranging speaker units at different heights (first axis for lower speakers, second axis for upper speakers at a different height). This vertical arrangement effectively increases the array length in the vertical dimension without increasing the overall footprint, thereby improving low-frequency efficiency while maintaining a compact cylindrical form factor
Solution Approach 2:
The system dynamically adjusts the radiation pattern and signal distribution among speaker units based on frequency content. At low frequencies, the distributed speaker arrangement creates effective acoustic coupling that overcomes the limitations of compact size, while at higher frequencies, the system can focus energy more precisely, maintaining efficiency across the audio spectrum
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 design improves the stereo sound field perception at lower frequencies and provides an immersive stereo experience comparable to separated loudspeakers, while maintaining efficiency across the audible range.
Implementation Method 1
a first pair of speakers (111, 112) for a first channel and a second pair of speakers (121, 122) for a second channel are arranged
Implementation Method 2
a signal applied to the first rear speaker (112) is delayed from that applied to the first front speaker (111) to form a radiation pattern (113) for the first channel
Data Source
Figure 1~2
Figure 3~5
AI summary
A monolithic loudspeaker (100) and a method for controlling a monolithic loudspeaker (100) are disclosed. The monolithic loudspeaker (100) comprises: a first pair of speakers for a first channel, including a first front speaker (111) and a first rear speaker (112), wherein the first front speaker (111) and the first rear speaker (112) are arranged along a first axis (114) in a first cross-section of the loudspeaker, and are arranged towards opposite directions； and a second pair of speakers for a second channel, including a second front speaker (121) and a second rear speaker (122), wherein the second front speaker (121) and the second rear speaker (122) are arranged along a second axis (124) in a second cross-section of the loudspeaker, and are arranged towards opposite directions, wherein the first axis (114) and the second axis (124) are deflected by an angle. According to an embodiment of this invention, a new arrangement for a monolithic loudspeaker (100) is proposed.