Pivoting Reflector Mount for Rear-Speaker Audio Redirection
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Solution Overview
Problem
Conventional portable electronic devices with rear-facing loudspeakers produce poor sound quality for listeners due to sound waves propagating directly rearward, lacking effective guidance for improved audio distribution.
Innovation Solution
An auxiliary mounting device with a mounting seat and pivotable reflecting plates that align with the electronic device's rear opening unit, allowing sound waves to propagate rearward through a through hole and then being reflected sidewardly and frontwardly, enhancing sound distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sound waves propagate directly rearward through the rear opening unit, then the loudspeaker structure is simple, but the sound quality for listeners is poor
Solution Approach 1:
A reflecting plate is introduced as an intermediary component between the loudspeaker and the environment. The reflecting plate redirects sound waves that would otherwise propagate directly rearward, channeling them forward to improve sound quality for listeners without complicating the loudspeaker structure itself
Solution Approach 2:
The reflecting plate utilizes spatial geometry to redirect sound waves from a rearward propagation direction to a forward direction. By positioning the reflecting plate at an appropriate angle, sound waves are redirected along a different spatial path, transforming the sound distribution pattern from simple rearward projection to forward-directed propagation
2Object-affected harmful factors
If a reflecting plate is added to redirect sound waves, then sound quality is improved, but the device complexity increases
Solution Approach 1:
The reflecting plate's angle and position are optimized to achieve effective sound redirection with minimal structural complexity. By carefully selecting the reflecting plate's orientation parameter, the system achieves improved sound quality without requiring complex mechanical structures or multiple components
Solution Approach 2:
The sound redirection function is extracted from the loudspeaker assembly itself and implemented as a separate, simple reflecting plate component. This separation allows the loudspeaker to remain simple while the reflecting plate handles the sound direction control, minimizing overall device complexity
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 for listeners by guiding sound waves from the electronic device's loudspeakers, providing a better audio experience by directing sound waves frontward and sideward, thereby enhancing the listening experience.
Implementation Method 1
the sound waves propagate rearwardly from the electronic device through the through hole in the rear wall of the mounting seat and are then reflected by the reflecting plate so as to propagate sidewardly and frontwardly
Data Source
AI summary
An auxiliary mounting device includes a mounting seat mounted with an electronic device thereon and having an upright rear wall formed with a through hole that is aligned with a rear opening unit in a housing of the electronic device. An upright reflecting plate is connected to a rear surface of the rear wall, is disposed adjacent to the through hole, is pivotable about a vertical axis relative to the rear wall, and is operated at a used position, where a desired angle is formed between the reflecting plate and the rear surface of the rear wall such that sound waves of an audio output reproduced by a loudspeaker of the electronic device propagate rearwardly from the electronic device through the through hole in the mounting seat and are then reflected by the reflecting plate so as to propagate sidewardly and frontwardly.