Speaker Overheating Solution with Infrasonic Cooling
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Summary
Problems
Existing speaker overheating suppression techniques either fail to quickly cool the speaker or significantly reduce audio volume, causing user discomfort.
Innovation solutions
An audio system that includes an overheating detector, a cooling processing section, and a controller to switch the audio signal to a second audio signal with an infrasonic frequency, mixing it with a cooling signal to vibrate the speaker's vibration plate at a larger amplitude, generating greater air flow for cooling while maintaining audible frequency components.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the level of audio signal is reduced to suppress heat generation in speaker, then heat generation is suppressed, but sound volume becomes low causing user discomfort
Why choose this principle:
The patent applies mechanical vibration by generating an infrasonic signal that causes the speaker's vibration plate to vibrate at large amplitude, producing air flow for cooling the speaker without reducing the audible audio signal level, thus avoiding user discomfort while effectively suppressing speaker overheating
Principle concept:
If the level of audio signal is reduced to suppress heat generation in speaker, then heat generation is suppressed, but sound volume becomes low causing user discomfort
Why choose this principle:
The patent uses periodic action by generating a continuous infrasonic cooling signal that periodically drives the vibration plate to create air flow, maintaining cooling effect throughout the audio playback without interrupting the audible content
Application Domain
Data Source
AI summary:
An audio system that includes an overheating detector, a cooling processing section, and a controller to switch the audio signal to a second audio signal with an infrasonic frequency, mixing it with a cooling signal to vibrate the speaker's vibration plate at a larger amplitude, generating greater air flow for cooling while maintaining audible frequency components.
Abstract
In implementations of an audio system, when overheating of a speaker is detected, a controller controls first and second selectors to input an audio signal output by an audio source device to a cooling processing section and cause output of the cooling processing section to be output to the speaker. In the cooling processing section, a mixer mixes an audio signal obtained by removing a low-frequency component from the input audio signal by a high-pass filter with a cooling signal at an infrasonic frequency generated by a cooling signal generator and adjusted with a gain by a gain adjuster. An audio signal obtained by mixing the audio signal with the cooling signal is output from the cooling processing section via a nonlinear inverse filter. A gain setting section sets the gain such that power of the cooling signal matches power of the low-frequency component extracted by a low-pass filter.