Dual Sound Module Phase Control for Housing Vibration Cancellation
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Solution Overview
Problem
Electronic devices with low-strength housings are prone to vibrating and generating noise due to the vibration of components like receivers or loudspeakers, affecting user experience.
Innovation Solution
Incorporating a first and second sound generating module within the housing, where their phases and/or amplitudes are controlled to cancel out vibrations and sound waves, utilizing existing components like loudspeakers and receivers to achieve dual-purpose functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If low-strength housing materials are used, then manufacturing cost is reduced, but housing vibration and noise increase
Solution Approach 1:
The patent utilizes the vibration generated by the second sound generating module (receiver) to counteract the harmful vibration from the first sound generating module (loudspeaker). By controlling the phases and amplitudes of both modules, the harmful vibration is converted into a beneficial counter-vibration that reduces overall housing vibration and noise, while maintaining the use of low-strength housing materials.
Solution Approach 2:
The second sound generating module (receiver) is made to serve dual purposes: its primary function of sound output and an additional function of vibration cancellation. By controlling the receiver to generate counter-vibrations, it simultaneously performs sound generation and harmful vibration reduction, eliminating the need for separate vibration cancellation components.
2Object-generated harmful factors
If vibration cancellation components are added, then housing vibration is reduced, but device complexity increases
Solution Approach 1:
The patent makes the existing receiver (second sound generating module) perform dual functions: sound output and vibration cancellation. By controlling the receiver to operate in different states (first operating state for sound output, second operating state for vibration cancellation), it eliminates the need for separate vibration cancellation components, thereby reducing device complexity while still achieving vibration reduction.
Solution Approach 2:
The system uses its own existing components (loudspeaker and receiver) to cancel vibrations rather than requiring external vibration cancellation components. The receiver serves itself to generate counter-vibrations that cancel the harmful vibrations from the loudspeaker, making the system self-sufficient and reducing overall complexity.
3Ease of manufacture
If existing components are used for dual-purpose, then manufacturing cost is reduced, but control complexity increases
Solution Approach 1:
The patent controls the receiver to operate in different states based on operational requirements. In the first operating state, the receiver outputs sound waves; in the second operating state, it outputs vibration signals for cancellation. This multi-functional control approach eliminates the need for additional components, reducing manufacturing cost while managing control complexity through state-based operation.
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
Prevents housing vibration and noise by canceling out vibrations and sound waves, improving user experience without adding new components, thus reducing manufacturing costs and internal stacking difficulties.
Implementation Method 1
sound waves emitted by the first sound generating module form first sound waves in the first accommodating cavity, and sound waves emitted by the second sound generating module form second sound waves in the first accommodating cavity; where a phase of the first sound waves is opposite to a phase of the second sound waves
Implementation Method 2
the first sound generating module outputs a first vibration signal to the housing, and the second sound generating module outputs a second vibration signal to the housing; where a phase of the first vibration signal is opposite to a phase of the second vibration signal
Data Source
AI summary
In an electronic device, a first sound generating module is disposed in a first accommodating cavity; and a second sound generating module is disposed in an accommodating space; when the first sound generating module is in a first operating state, the second sound generating module is in a second operating state, the first sound generating module outputs a first vibration signal to a housing, and the second sound generating module outputs a second vibration signal to the housing; or sound waves emitted by the first sound generating module form first sound waves in the first accommodating cavity, and sound waves emitted by the second sound generating module form second sound waves in the first accommodating cavity; or the first sound generating module outputs a first vibration signal to a housing, and sound waves emitted by the second sound generating module form second sound waves in the first accommodating cavity.