Exciter Speaker Feedback Loop for Uniform Sound Quality
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Solution Overview
Problem
Exciter type speakers output varying sounds based on the characteristics of the attachment surface, requiring users to find suitable surfaces and locations, which can be uncomfortable due to inconsistent sound quality.
Innovation Solution
An audio device with a housing, vibration element, microphone, PCB, processor, and communication circuit that generates a second audio signal to correct deviations in sound output based on the attachment surface characteristics, ensuring uniform sound quality by adjusting the vibration element's vibrations accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the exciter type speaker is attached to different surfaces, then the sound output varies according to surface characteristics, but this requires users to find suitable attachment surfaces and locations which is uncomfortable
Solution Approach 1:
The patent implements a feedback mechanism where the microphone captures the actual sound output from the attachment surface, and the processor analyzes this feedback to automatically adjust the driving signal. This closed-loop system eliminates the need for manual surface selection by continuously adapting to the actual acoustic characteristics of the attached surface.
Solution Approach 2:
The system performs self-adjustment by automatically analyzing the attachment surface characteristics through the microphone and processor, and autonomously correcting the sound output without requiring user intervention. The device serves itself by adapting to different surfaces through automated feedback processing.
2Reliability
If the vibration element makes the attachment surface vibrate to output sound, then stereoscopic and vivid content is achieved, but different sounds are output according to attachment surface characteristics
Solution Approach 1:
The patent changes the parameters of the driving signal based on the analyzed attachment surface characteristics. The processor adjusts frequency, amplitude, and phase parameters of the vibration signal to compensate for surface-specific acoustic properties, ensuring consistent sound quality across different surfaces.
Solution Approach 2:
The patent replaces manual mechanical surface selection with an automated acoustic measurement and signal processing system. The microphone and processor substitute for the user's manual adjustment process, automatically detecting surface characteristics and computing the appropriate driving signal corrections.
3Reliability
If the microphone obtains sound signal and the processor corrects the driving signal based on deviation analysis, then uniform sound quality is achieved, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality where the vibration element serves both as the sound output actuator and the attachment surface sensor, and the microphone serves both as an acoustic sensor and part of the feedback control system. This reduces the need for separate dedicated components for each function.
Solution Approach 2:
The patent merges the driving signal generation and correction functions into a single integrated processor that handles both the original audio signal processing and the feedback-based correction. The housing structure is also merged to provide both mechanical support and acoustic enclosure functions.
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 audio device achieves uniform sound quality by adapting to the attachment surface characteristics, providing consistent sound output regardless of the surface's material or density, enhancing user experience.
Implementation Method 1
a vibration element disposed on the first surface... such that the vibration element makes the external object vibrate
Implementation Method 2
a microphone configured to obtain a sound generated as the vibration element makes an external object vibrate
Data Source
AI summary
An audio device according to an embodiment set forth in the present document comprises: a housing comprising a first surface, a second surface that faces the first surface, and side surfaces that surround the space between the first surface and the second surface; a vibration element disposed on the first surface; a microphone which acquires sound generated by the vibration of an external object by the vibration element; a printed circuit board disposed inside the housing; a processor disposed on the printed circuit board; and a communication circuit which is electrically connected to the processor, and receives a first audio signal from an external electronic device, wherein the processor, when the vibration element is attached to an external object, generates a second audio signal such that the vibration element vibrates the external object, causes the microphone to acquire a third audio signal generated by the vibration of the external object, corrects the first audio signal on the basis of the deviation between the second audio signal and the third audio signal, and can make the vibration element vibrate the external object on the basis of the corrected first audio signal. Various other embodiments inferred from the specification are also possible.