Speaker Device with Counter-Vibrating Passive Drivers
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Solution Overview
Problem
Small-sized electronic devices face limitations in improving video and sound quality, particularly in the low frequency band, due to restricted physical space, leading to weakened low-frequency sound and vibration issues with passive speakers.
Innovation Solution
A speaker device with a housing design that includes multiple speakers vibrating in different directions to form sound passages, counteracting vibrations and enhancing low-frequency sound output, while maintaining a lightweight structure to mitigate mechanical noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a passive speaker with a heavy diaphragm is used to generate low-frequency sound, then low-frequency sound quality is improved, but the speaker device vibrates and causes mechanical noise
Solution Approach 1:
The patent employs a passive speaker with a diaphragm that vibrates in opposition to the active speaker's diaphragm. When the active speaker produces sound waves, the passive speaker's diaphragm moves in the opposite direction, creating counterbalancing forces that cancel out mechanical vibrations and reduce noise while maintaining low-frequency sound quality.
2Object-generated harmful factors
If the passive speaker is made lighter to reduce vibration, then mechanical noise is reduced, but low-frequency sound output is weakened
Solution Approach 1:
The passive speaker's diaphragm is designed to vibrate in opposition to the active speaker, creating counterbalancing forces. This allows the system to maintain low-frequency sound output without requiring excessive diaphragm mass, as the counter-vibration mechanism compensates for the reduced mass while still canceling harmful mechanical vibrations.
3Manufacturing precision
If the sound space is increased to improve low-frequency sound, then low-frequency sound quality is improved, but the device size increases
Solution Approach 1:
The patent integrates the passive speaker within the housing structure, nesting it alongside the active speaker in a compact arrangement. The passive speaker's diaphragm is positioned to utilize the existing sound space efficiently, allowing low-frequency sound generation without significantly increasing the overall device volume.
Solution Approach 2:
The patent utilizes the third dimension by positioning the passive speaker's diaphragm to vibrate in a direction opposite to the active speaker. This spatial arrangement allows for effective low-frequency sound generation and vibration cancellation within a compact form factor, avoiding the need for excessive sound space in any single dimension.
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
The solution improves sound quality by reinforcing low-frequency sound and reducing mechanical vibrations, resulting in enhanced sound pressure levels and reduced harmonic distortion across the audible frequency band.
Implementation Method 1
a first speaker mounted in the housing, configured to receive a sound signal, and generate a first sound in a first direction, a second speaker mounted in the housing, configured to generate a second sound in a second direction by vibrating according to a change in pressure of the inner space caused by operation of the first speaker
Implementation Method 2
a second speaker mounted in the housing, configured to generate a second sound in a second direction by vibrating according to a change in pressure of the inner space caused by operation of the first speaker, and a third speaker mounted in the housing, configured to generate a third sound in a third direction by vibrating according to the change in the pressure of the inner space caused by the operation of the first speaker. The second speaker and the third speaker are mounted opposite to each other
Data Source
AI summary
A speaker device and an electronic device including the speaker device are provided. The electronic device includes a housing including an inner space and at least one through hole formed in a first direction, at least one speaker disposed in the inner space, directed toward the at least one through hole, a first structure disposed in the inner space, directed in a second direction different from the first direction, for vibrating along with vibration of the speaker generated when the speaker outputs first sound, and forming a first sound passage together with a part of the housing, and a second structure disposed in the inner space, directed in a third direction different from the first and second directions, for vibrating along with vibration of the speaker generated when the speaker outputs the first sound, and forming a second sound passage together with another part of the housing.