Dual-Speaker Module Layout for Larger Woofer in Slim Devices
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Solution Overview
Problem
The miniaturization trend of electronic devices such as tablets and smartphones poses a challenge for accommodating large woofers and tweeters, as traditional side-by-side placement in the width direction limits the size of the tweeter, compromising bass performance.
Innovation Solution
The speakers are arranged in a speaker module with the woofer and tweeter spaced in the length direction, allowing for a larger woofer size, with the tweeter closer to the sound outlet for improved treble performance, and a baffle structure separates the sound outlet channel to enhance airflow and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the woofer and tweeter are disposed side by side in the width direction at locations equidistant from the sound outlet, then the speaker module structure is simple and symmetric, but the woofer size is limited and bass performance deteriorates
Solution Approach 1:
The patent transitions from a width-direction arrangement to a length-direction arrangement of speakers. The woofer and tweeter are disposed at different positions along the length direction of the housing body, with the woofer closer to the sound outlet. This dimensional change allows the woofer to achieve larger size without increasing the width of the electronic device, thereby improving bass performance while maintaining compact form factor.
2Reliability
If the woofer size is increased for better bass performance, then bass performance is improved, but the electronic device width must be increased which conflicts with miniaturization trend
Solution Approach 1:
Instead of increasing device width to accommodate larger woofer, the patent utilizes the length direction of the housing body. The woofer is positioned closer to the sound outlet along the length direction, allowing larger woofer diameter without increasing the width dimension of the electronic device. This resolves the conflict between bass performance and miniaturization.
Solution Approach 2:
The patent employs asymmetric arrangement of speakers along the length direction, with the woofer positioned closer to the sound outlet than the tweeter. This asymmetric positioning optimizes the acoustic path for bass frequencies while allowing larger woofer size, without requiring symmetric width expansion of the device.
3Reliability
If the tweeter is positioned closer to the sound outlet for improved treble performance, then treble performance is improved, but the spacing between woofer and tweeter decreases limiting woofer size
Solution Approach 1:
The patent utilizes the length direction of the housing body to position both speakers at different distances from the sound outlet along the length axis. The tweeter is positioned closer to the sound outlet for optimal treble performance, while the woofer is positioned further back along the length direction, providing sufficient spacing for large woofer diameter without compromising either speaker's performance.
Data Source
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AI summary
This application discloses a speaker module and an electronic device, and belongs to the field of electronic device technologies. The speaker module includes a housing body, a first speaker, and a second speaker. The housing body has a sound outlet and a sound outlet channel, and the sound outlet channel is in communication with the sound outlet. The first speaker and the second speaker are spaced from each other in the sound outlet channel in a first direction, the second speaker is located on a side that is of the first speaker and that is away from the sound outlet, and an operating frequency band of the first speaker is different from an operating frequency band of the second speaker. In the speaker module provided in this application, the two speakers are disposed side by side from far to near relative to the sound outlet. When the sound outlet is disposed on a wide side of the electronic device, the two speakers are spaced from each other in a length direction of the electronic device, thereby implementing mounting of a speaker with a large size.