Speaker Plate Geometry for Precise High-Frequency Response Tuning
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Solution Overview
Problem
Existing techniques struggle to adjust the sound pressure frequency characteristic with high precision targeting specific frequency bands in speaker units, particularly in the high range of 1 kHz to 2 kHz or higher, due to standing waves generated inside the headphone housing.
Innovation Solution
A speaker unit design featuring a diaphragm supported on a frame with a plate having an outer peripheral portion, defining a space with an opening at its center, where the distance between the opening edge and the outer peripheral portion ranges from 8 mm to 42 mm, allowing precise adjustment of sound pressure frequency characteristics by controlling resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional equalizer designs with sound holes are used, then sound pressure frequency characteristic adjustment is achieved, but precision targeting of specific high frequency bands (1 kHz to 2 kHz or higher) cannot be achieved due to standing waves
Solution Approach 1:
The patent changes the geometric parameters of the plate structure, specifically the distance from the opening edge to the outer peripheral portion (8 mm to 42 mm), to control resonance characteristics and adjust sound pressure frequency response in specific high frequency bands without generating harmful standing waves
Solution Approach 2:
The patent utilizes controlled mechanical vibration and resonance of the plate structure to achieve precise sound pressure frequency characteristic adjustment. By designing the plate with specific dimensions and opening positions, it creates controlled resonance that targets specific frequency bands (1 kHz to 2 kHz or higher) without producing unwanted standing waves
2Measurement precision
If the distance between opening edge and outer peripheral portion is not controlled within 8 mm to 42 mm, then manufacturing is easier, but sound pressure frequency characteristic adjustment precision is lost
Solution Approach 1:
The patent establishes a specific parameter range (8 mm to 42 mm) for the distance between opening edge and outer peripheral portion that balances manufacturing feasibility with acoustic performance. This parameter range enables precise sound pressure frequency characteristic adjustment while remaining practical for manufacturing processes
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
Enables precise adjustment of sound pressure frequency characteristics in specific bands by reducing radiated sound levels through controlled resonance, enhancing sound quality by forming dips in targeted frequency ranges.
Implementation Method 1
a distance between an edge of the opening and the outer peripheral portion is in a range of 8 mm to 42 mm
Data Source
AI summary
A speaker unit includes a diaphragm and a plate. The diaphragm is supported on a frame The plate includes an outer peripheral portion. The outer peripheral portion is supported on the frame. The plate defines a space surrounded by the outer peripheral portion between the plate and the diaphragm and having an opening at a center of the plate. A distance between an edge of the opening and the outer peripheral portion is in a range of 8 mm to 42 mm.