Loudspeaker Volume Control via Infrared Distance Sensing
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Solution Overview
Problem
Existing loudspeaker systems require manual adjustment of volume and orientation to optimize auditory performance, which is inconvenient and disrupts the listening experience when the listener moves.
Innovation Solution
A loudspeaker control system that includes a detecting device generating sensing signals in response to a target object's presence, such as an infrared sensor detecting IR radiation from a human, and a processor that adjusts the loudspeaker's volume and orientation based on the object's size and position information to maintain optimal sound delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of volume and orientation is performed to optimize auditory performance, then the sound quality can be improved, but the operation becomes troublesome and causes interruption when the listener moves
Solution Approach 1:
The system automatically detects the listener's position using sensors and adjusts the loudspeaker's volume and orientation without requiring manual intervention. The processor receives position information from the detecting device and autonomously controls the loudspeaker parameters, making the system self-adjusting based on user location.
Solution Approach 2:
The system continuously monitors the listener's position through the detecting device and uses this feedback information to dynamically adjust the loudspeaker's output. The processor receives real-time position data and modifies volume and orientation parameters accordingly, creating a closed-loop control system that adapts to user movement.
2Adaptability or versatility
If the listener moves to another place, then the listening position changes, but the sounding parameters become unbalanced and require re-adjustment
Solution Approach 1:
The system dynamically adjusts the loudspeaker's volume and orientation parameters in real-time based on the listener's position. Instead of static fixed settings, the system continuously adapts its parameters to match the user's location, ensuring optimal sound delivery without requiring manual re-adjustment when the listener moves.
Solution Approach 2:
The system proactively adjusts the loudspeaker parameters before the listener completes their movement to the new position. By continuously monitoring position and anticipating the need for adjustment, the system maintains optimal sound quality without waiting for manual intervention or experiencing imbalance.
3Extent of automation
If automatic adjustment based on size information is implemented, then the system can adapt to user position, but the device complexity increases
Solution Approach 1:
The detecting device serves multiple functions: it detects the listener's presence, determines position information, and provides data for both volume and orientation adjustments. The processor integrates multiple control functions (volume adjustment and orientation control) into a single device, reducing overall system complexity while maintaining automation.
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
Automatically adjusts the loudspeaker's volume and orientation to maintain consistent sound quality and direction, reducing the need for manual adjustments and enhancing the listening experience by adapting to the user's position.
Implementation Method 1
an infrared sensor, which generates a first sensing signal when sensing IR radiation from a first heat-radiating source
Data Source
AI summary
A system for automatically adjusting a volume of a loudspeaker includes a loudspeaker and a processor. An infrared sensor, which generates a sensing signal when sensing IR radiation from a heat-radiating source, is disposed on the loudspeaker. The sensing signal provides a size information commensurate with a size of the heat-radiating source. The processor receives a plurality of the sensing signals at different time points to obtain a plurality of corresponding size information, realizes a change of distance between the heat-radiating source and the loudspeaker according to a change of the size information, and generates a volume-adjusting signal according to the change of distance between the heat-radiating source and the loudspeaker. The volume-adjusting signal is transmitted to the loudspeaker to adjust the volume of the loudspeaker accordingly.