Acoustic Apparatus Volume Control Interface
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Solution Overview
Problem
Existing methods for controlling sound volume in acoustic installations, such as loudspeakers or amplifiers, risk inadvertently setting the volume to maximum, leading to undesirable high sound levels.
Innovation Solution
A control method that limits the cursor's movement range on a graphical interface, ensuring the sound volume can only be adjusted within a restricted range, preventing accidental maximum volume settings by requiring multiple gestures to reach the maximum value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the slider is allowed to move freely across the entire scale from minimum to maximum volume, then the user can easily adjust the volume to any desired level, but the operator risks unintentionally setting the volume to maximum
Solution Approach 1:
The volume control range is segmented into multiple discrete steps rather than allowing continuous adjustment. The slider moves through predefined volume levels (e.g., 0%, 25%, 50%, 75%, 100%) rather than any arbitrary position, making accidental jumps to maximum less likely while maintaining ease of use.
Solution Approach 2:
The system performs preliminary validation of the desired volume setting before applying it. When the slider approaches the maximum position, the system detects the intent and requires additional confirmation (such as a separate confirm button or prolonged press) before allowing the volume to reach maximum, preventing unintentional setting.
2Reliability
If the slider movement is restricted to a limited range, then the risk of accidental maximum volume setting is reduced, but the user cannot easily adjust the volume to the maximum value when needed
Solution Approach 1:
The control interface dynamically adapts its behavior based on the current volume level and user interaction patterns. When adjusting from low volume, the slider can reach maximum more easily. When at or near maximum, further adjustment requires additional confirmation steps. This dynamic adjustment of control constraints maintains both safety and accessibility.
Solution Approach 2:
The system provides visual and auditory feedback to confirm the user's intent before applying extreme volume changes. When the slider approaches maximum volume, the interface displays confirmation prompts or changes in visual indication, and may provide audible previews, ensuring the user consciously confirms the maximum volume setting.
3Productivity
If the slider can be moved quickly across the scale, then the volume can be changed rapidly, but the operator may inadvertently overshoot or set an unintended volume level
Solution Approach 1:
The volume adjustment operates in periodic discrete steps rather than continuous movement. The slider advances through predefined volume increments (e.g., 0→25→50→75→100) with clear stops at each level, allowing rapid adjustment while preventing overshooting since the slider cannot land between defined steps.
Solution Approach 2:
The system performs preliminary detection of the slider's target position and validates it against the predefined volume steps before applying the change. This ensures that even if the user moves the slider quickly or inaccurately, the system interprets the intent and snaps to the nearest valid volume level, maintaining precision without sacrificing speed.
Data Source
Figure 1
AI summary
A method for controlling an operating parameter of an acoustic apparatus (10), comprising at least the following steps: - provision of a screen (25) displaying at least one window (40) comprising a cursor (60) able to occupy a plurality of positions with respect to a reference (55) of the window, the positions of the cursor being respectively representative of a plurality of values of the operating parameter extending between a minimum value and a maximum value, - display of the cursor in an initial position with respect to the reference representative of an initial value of the operating parameter, - acquisition of an elementary command from an operator, - movement of the cursor with respect to the reference as a function of the acquired elementary command, from the initial position to a final position in order to select a final value of the operating parameter in a range of selected values containing the initial value, and - transmission to the acoustic apparatus of the selected final value, characterized in that the range of selectable values has an amplitude strictly less than the difference between the maximum value and the minimum value.