Audio Reproduction Bass Control for Low-Battery Energy Saving
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Solution Overview
Problem
Audio signal reproduction devices in vehicles consume excessive electrical power, particularly for bass frequencies, which reduces battery life and vehicle range, as they require high sound pressure and power to maintain perceived loudness, especially in low-frequency ranges.
Innovation Solution
A device and method that implement an energy-saving mode by reducing bass frequency components of audio signals using a control device connected to an energy storage device, which determines the charge state and activates a high-pass filter to reduce power consumption, and selects audio files based on energy thresholds and metadata, ensuring efficient energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If bass frequency components are reproduced with high sound pressure to maintain perceived loudness, then audio quality is improved, but electrical power consumption increases
Solution Approach 1:
The system dynamically changes the frequency spectrum parameters of the audio signal by reducing bass frequency components when battery charge is low. The control device modifies the audio signal characteristics based on the charge state, thereby reducing power consumption while maintaining acceptable perceived loudness through parameter adaptation
Solution Approach 2:
The audio reproduction system transitions between different operational states based on battery charge level. When charge is sufficient, full bass reproduction is enabled; when charge is low, the system dynamically adjusts to reduce bass components, creating a dynamic adaptation to energy availability conditions
2Reliability
If full audio signal reproduction is maintained, then audio quality is preserved, but battery life is reduced
Solution Approach 1:
The system changes the audio signal parameters (reducing bass frequency components) based on the charge state of the energy storage device. This parameter modification allows the system to extend battery life by reducing power consumption during low-charge conditions while maintaining audio reproduction functionality
Solution Approach 2:
The control device continuously monitors the charge state of the energy storage device and uses this feedback information to adjust the audio signal processing. When the charge state indicates low energy availability, the system automatically reduces bass components, creating a closed-loop control that adapts to energy conditions
3Use of energy by moving object
If bass frequency components are reduced to save energy, then power consumption is reduced, but audio quality deteriorates
Solution Approach 1:
The system dynamically adjusts audio signal processing based on real-time energy availability. Rather than permanently degrading audio quality, the system temporarily reduces bass components only when necessary (low charge state), maintaining full audio quality when energy is sufficient, thus creating a dynamic balance between quality and energy consumption
4Power
If high power is supplied to maintain audio reproduction, then audio output quality is improved, but vehicle range is reduced
Solution Approach 1:
The system modifies the power distribution parameters across different frequency bands based on energy availability. By reducing power allocation to bass frequency components when charge is low, the system extends vehicle range while maintaining audio reproduction at reduced power levels, achieving a trade-off between range and audio output
Data Source
AI summary
A device and method for controlling reproduction of an audio signal is provided, wherein the device is operated by means of an energy storage device. The method comprises the steps of deactivating a normal mode and activating an energy saving mode. Power consumption from the energy storage device for reproduction of the audio signal is reduced in the energy saving mode when compared to the normal mode. The method comprises reducing in the energy saving mode, a bass frequency component of a frequency spectrum of the audio signal and outputting the audio signal with reduced bass frequency component. The method further comprises ascertaining a charge state of the energy storage device and controlling the reduction in the bass frequency component based on a decrease in the charge state of the energy storage device.