Dual Sound Output Speaker Layout for Phone Call Privacy
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Solution Overview
Problem
Sound leakage in electronic devices such as mobile phones and tablets is a challenge, particularly in confined environments, where a user's private call information may be inadvertently shared with others.
Innovation Solution
The electronic device incorporates a dual sound output system with separate sound-making modules and channels, where one module emits sound closer to the ear and the other away from it, utilizing distinct sound paths with phased sound waves to cancel each other out, and includes sealing elements to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single sound output hole is provided in the electronic device, then the structure is simple and manufacturing is easy, but sound leakage occurs in confined environments
Solution Approach 1:
The patent divides the single sound output function into two separate sound output portions: a first sound output portion (earpiece) and a second sound output portion (loudspeaker). This segmentation allows different sound-making modules to operate through distinct paths, enabling privacy protection functionality while maintaining manufacturing feasibility through modular assembly
2Object-affected harmful factors
If two sound output portions are provided with separate sound-making modules, then sound leakage is reduced through wave cancellation, but the device complexity increases
Solution Approach 1:
The patent combines two sound-making modules (earpiece and loudspeaker) into a single integrated speaker assembly housing. This merging approach allows the dual sound output system to share common components such as the housing structure, sealing elements, and control circuitry, thereby reducing overall device complexity while maintaining the sound leakage reduction functionality
3Measurement precision
If the first sound output portion is positioned close to the ear canal, then call audio quality is improved, but sound from the second output portion may interfere with the user experience
Solution Approach 1:
The patent introduces sealing elements as intermediaries between the two sound output portions and the device interior. These sealing elements isolate the sound paths, preventing sound from the second output portion (loudspeaker) from interfering with the user's listening experience through the first output portion (earpiece), while allowing each to function at optimal positions
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 effectively reduces sound leakage, ensuring privacy during calls by canceling out sound waves and maintaining an exquisite appearance without the need for an earpiece hole.
Implementation Method 1
the first sound-making module and the second sound-making module are disposed in the speaker, the housing is provided with a first sound-making hole and a second sound-making hole. The first sound-making hole communicates with the first sound output portion to form a first sound-making path, a sound emitted by the first sound-making module is propagated outward through the first sound-making path
Data Source
AI summary
The electronic device includes: a rear housing; a middle frame, where the middle frame is connected to the rear housing; a display, where the display is connected to the middle frame; and a sound-making system, where the sound-making system includes a housing and a speaker, the speaker is disposed in the housing, a first sound-making module and a second sound-making module are disposed in the speaker, and the housing is provided with a first sound-making hole and a second sound-making hole. The electronic device is provided with a first sound output portion and a second sound output portion, where the first sound output portion is provided closer to the display than the second sound output portion; or the first sound output portion is located inside the display, and the second sound output portion is located outside the display.