Flat Speaker Bidirectional Sound Emission Design
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Solution Overview
Problem
Current acoustic devices are not suitable for performances involving musical instruments, as they fail to provide high-quality sound reproduction over a wide frequency band while being thin and lightweight, and they cannot bidirectionally emit sound effectively from front and rear to both listeners and performers.
Innovation Solution
The acoustic device employs a flat speaker for low-frequency sound emission from both front and rear, and separate speakers for mid-to-high frequency sound emission from the front and rear, with adjustable signal adjustment circuits to optimize sound characteristics, allowing for thin and lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two full-range speaker units with cones are arranged back-to-back, then both listeners and performers can hear the sound, but the size of the speaker apparatus increases in the front-back direction
Solution Approach 1:
The patent divides the speaker system into three separate speaker units with distinct frequency ranges: a first speaker for low frequencies, a second speaker for mid frequencies, and a third speaker for high frequencies. This segmentation allows each speaker to be optimized for its specific frequency range and enables a thinner overall design compared to using two full-range speakers with cones.
Solution Approach 2:
Each speaker unit is designed with specific local characteristics suitable for its frequency range. The first speaker (low frequency) may have a different diaphragm structure compared to the second (mid frequency) and third (high frequency) speakers. This local optimization allows for better sound quality in each frequency band while reducing the overall thickness of the apparatus.
2Length of moving object
If flat speakers are used for bidirectional sound emission, then the device can be made thin and lightweight, but high-quality sound reproduction over a wide frequency band cannot be achieved
Solution Approach 1:
The frequency band is segmented into three ranges (low, mid, high) with each range handled by a dedicated speaker unit. This allows the system to achieve wide frequency band coverage while maintaining a thin profile, as each speaker can be optimized for its specific frequency range without requiring the bulk of a full-range speaker.
Solution Approach 2:
The patent creates a multi-functional speaker system where three different speaker units work together to cover the entire frequency spectrum. Each speaker unit serves a specific function (low, mid, or high frequency), but collectively they provide universal sound reproduction capability across all frequency ranges, making the thin device suitable for various audio applications including musical instruments and music reproduction.
3Length of moving object
If flat speakers are used for bidirectional sound emission, then the device can be made thin and lightweight, but high-quality sound reproduction for musical instruments and music reproduction cannot be achieved
Solution Approach 1:
By segmenting the frequency response into three distinct ranges handled by specialized speaker units, the system achieves high-fidelity sound reproduction suitable for musical instruments and music. Each speaker type is optimized for its frequency range, ensuring accurate reproduction without the compromises inherent in using single-type flat speakers.
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 configuration enables high-quality sound reproduction over a wide frequency band, ensuring both listeners and performers can hear the sound, with adjustable sound emission characteristics to suit different scenarios, maintaining a slim and lightweight device.
Implementation Method 1
a flat speaker configured to emit sound, from a front and a rear thereof, in a low frequency sound range
Implementation Method 2
a first speaker configured to emit sound, in a direction facing the front of the flat speaker, in a mid-to-high frequency sound range
Implementation Method 3
a second speaker configured to emit sound, in a direction facing the rear of the flat speaker, in the mid-to-high frequency sound range
Data Source
AI summary
Provided is an acoustic device with which it is possible to make reproduced sound able to be heard across a wide frequency range, from the front and from the rear. This acoustic device is provided with a flat speaker 3 configured to emit sound, from a front and a rear thereof, in a low frequency sound range. Also, provided therein are a first speaker 5F configured to emit sound, in a direction facing the front of the flat speaker, in a mid-to-high frequency sound range, and a second speaker 5R configured to emit sound, in a direction facing the rear of the flat speaker, in the mid-to-high frequency sound range.