Hidden Speaker Horn Acute Angle Sound Guidance
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Solution Overview
Problem
Hidden speakers in electronic devices like digital TVs face sound attenuation issues due to sound colliding with the device's surface, leading to reduced sound quality as it is not directly transmitted to the listener.
Innovation Solution
A hidden speaker apparatus is designed with a high range speaker and a horn that directs sound at an acute angle to prevent direct collision with the device's body, using a full range speaker and a minus equalizer to ensure clear sound output across all frequency ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the hidden speaker apparatus is installed on the lower surface of the electronic product to be invisible from the front side, then the aesthetic appearance is improved, but the sound output collides against the surroundings and is lost in some ranges
Solution Approach 1:
The patent changes the parameter of sound output direction by adjusting the horn's orientation to form an acute angle (30-60 degrees) with the front surface of the electronic product. This angular parameter adjustment allows sound to be directed toward the listener while avoiding direct collision with the product body, thereby reducing sound attenuation while maintaining the hidden installation aesthetic.
Solution Approach 2:
The horn acts as an intermediary component between the speaker and the surrounding environment. It serves as a sound guide that transforms the direct sound output into a directed beam at an acute angle, mediating the interaction between the hidden speaker and the listener while preventing harmful sound collision with the electronic product body.
2Loss of energy
If the sound output direction is directed straight forward, then the sound is transmitted directly to the listener, but the sound collides against the main body of the electronic product causing attenuation
Solution Approach 1:
The patent introduces asymmetry in the sound output configuration by directing sound at an acute angle rather than a straight horizontal direction. This asymmetric angular orientation (30-60 degrees from the front surface) allows the sound to avoid the symmetric collision problem with the device body while still reaching the listener effectively.
Solution Approach 2:
The horn is designed with specific local geometric properties that concentrate and direct sound energy in a particular acute angle direction. This local quality of the horn structure enables selective sound projection toward the listener while excluding the direction toward the device body, thereby avoiding harmful sound collision.
3Measurement precision
If a high range speaker is used to output high range sound, then the high frequency sound quality is improved, but the sound may be lost in some ranges due to collision
Solution Approach 1:
The patent applies parameter changes by optimizing the horn's acoustic parameters (shape, size, material) to match the high frequency characteristics of the high range speaker. This ensures that the sound waves in the high frequency range are properly guided and directed at the acute angle without excessive attenuation, maintaining high frequency sound quality while preventing energy loss.
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 significantly reduces sound attenuation in the high range, allowing for uniform sound quality across all frequencies, ensuring clear and rich sound output to the listener.
Implementation Method 1
a horn that guides a sound outputting direction of the tweeter in a direction that forms the acute angle
Implementation Method 2
the sound output from the horn does not directly collide against a main body of the electronic product
Data Source
AI summary
Provided is a hidden speaker apparatus used as a sound apparatus in a digital TV. The hidden speaker apparatus includes a high range speaker that is disposed such that a sound output direction and a direction to a front side where a listener is present form an acute angle. The high range speaker mitigates high range sound attenuation of the hidden speaker apparatus.