Audio Transducer Layout to Minimize Panel Rocking Motion
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Solution Overview
Problem
High power distributed mode loudspeakers suffer from persistent rocking motion at lower pistonic frequencies, which can cause physical damage to the voice coil, especially during high power operations, due to the mechanical resonance and bending wave vibrations.
Innovation Solution
The design incorporates an asymmetric placement of audio transducers on the panel, with specific coordinates in the X-direction and Y-direction relative to the center, to minimize force moments and reduce non-axial displacements, along with a honeycomb structure and optimized air gaps to enhance mechanical stabilization and magnetic coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If transducers are used in high power distributed mode loudspeakers, then power handling capability is improved, but persistent rocking motion occurs at lower pistonic frequencies causing physical damage to the voice coil
Solution Approach 1:
The patent applies asymmetry by positioning transducers at specific asymmetric coordinates relative to the panel center. The first transducer is positioned at coordinates (x1, y1) and the second transducer at coordinates (x2, y2), where these positions are deliberately asymmetric to minimize force moments and reduce rocking motion during high power operation, thereby preventing voice coil damage while maintaining power handling capability.
2Stability of the object's composition
If transducers are placed symmetrically on the panel, then structural balance is improved, but force moments are not minimized leading to rocking motion
Solution Approach 1:
The patent deliberately employs asymmetric transducer placement rather than symmetric positioning. The transducers are positioned at specific asymmetric coordinates (x1, y1) and (x2, y2) relative to the panel center, which minimizes the force moments generated during operation. This asymmetric configuration reduces rocking motion and harmful vibrations while maintaining overall structural stability.
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 approach effectively reduces the risk of physical damage to the voice coil and maintains performance across the operational frequency range by minimizing rocking motion and ensuring even modal distribution, resulting in a more stable and efficient sound transmission.
Implementation Method 1
a first audio transducer positioned at a first location on the panel and a second audio transducer positioned at a second location on the panel
Implementation Method 2
distributed mode loudspeakers are relatively new, certain key design principles have already been developed and have been adopted by designers in this field
Implementation Method 3
These types of loudspeakers have come to be referred to as distributed mode loudspeakers since they rely on exploiting the mechanical resonance of the panels used in these loudspeakers
Data Source
AI summary
System and method for audio transducer stabilization comprising providing a sound generation panel for transmission of audio sound waves in response to a plurality of force inputs received from three or more audio transducers, providing a mounting frame for coupling to the sound generation panel, the mounting frame having three or more predefined locations for receiving audio transducers, placing the three or more audio transducers in the predefined locations, the predefined locations optimized to reduce a plurality of force moments when the audio transducers are driven using an input drive signal, connecting a coupler ring on each of the audio transducers placed in the predefined locations on the mounting frame to an outer surface of the sound generation panel, and driving each of the audio transducers using the input drive signal from an audio amplifier.