Amplifier Function Switching With Stable Volume Restoration
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Solution Overview
Problem
Amplification devices struggle to prevent unintended sound volume changes when switching between amplifier functions, leading to emission of sounds with inappropriate volumes.
Innovation Solution
The amplification device incorporates a microcontroller that stores sound volume set values and adjusts the volume-control knob position based on these values when switching between amplifier functions, ensuring consistent sound volumes by disabling volume adjustment during main amplifier operation and resetting the volume-control knob to previous settings when switching back to pre-amplifier or pre-main amplifier modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the amplifier function is switched between pre-amplifier and main amplifier modes, then the device becomes more versatile and adaptable to different usage scenarios, but unintended sound volume changes occur and sound stability deteriorates
Solution Approach 1:
The microcontroller stores the sound volume set value before switching to main amplifier mode and automatically restores it when switching back to pre-amplifier mode. This preliminary storage and restoration action prevents unintended volume changes, ensuring sound volume stability while maintaining the versatility of amplifier function switching.
2Ease of operation
If volume adjustment is allowed during main amplifier operation, then user control flexibility is improved, but unintended large sound volumes may be emitted and reliability deteriorates
Solution Approach 1:
The patent extracts the volume adjustment function during main amplifier operation by disabling the volume control in this mode. This prevents users from accidentally setting large volumes while maintaining full volume control flexibility when operating in pre-amplifier mode, thereby eliminating the harmful effect of unintended large sound volume emission.
Data Source
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AI summary
An amplification device is configured to operate such that when a first amplifier function is switched to a second amplifier function (S13) and then the second amplifier function is switched to the first amplifier function (S15) and at this time a state of an operating member is a state corresponding to a second sound volume larger than a first sound volume that was output right before switching from the first amplifier function to the second amplifier function (S16), the amplification device causes the state of the operating member to change to a state corresponding to a third sound volume smaller than the second sound volume (S17), and controls an amplifying operation of a signal processing circuit to cause it to output the third sound volume (S18).