Speaker Frequency Remapping for Louder Small-Device Audio
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Solution Overview
Problem
Portable speakers, especially those in small devices, face challenges in producing high-quality sound due to size constraints, often resulting in poor performance in the presence of background noise.
Innovation Solution
A computer-implemented method that uses a digital signal processor to obtain a frequency response curve from a speaker, identifies the frequency range associated with maximum output volume, and remaps audio input in real-time to produce an audio output within this target frequency range, enhancing speaker efficiency without requiring larger components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If larger speaker components are used to produce high-quality sound output across a wide range of frequencies, then sound quality is improved, but device size increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the frequency response characteristics of the speaker through digital signal processing. The system identifies the speaker's peak frequency range from its frequency response curve and applies gain adjustments to amplify output in this specific frequency range, thereby improving sound quality without requiring larger physical components.
2Reliability
If larger speaker components are used to produce even sound output across wide frequency range, then audio performance is improved, but portability deteriorates
Solution Approach 1:
The patent applies local quality by focusing enhancement on specific frequency ranges rather than attempting to uniformly improve all frequencies. The system identifies the speaker's peak frequency range and applies targeted gain adjustments only in this local frequency band, optimizing audio performance for speech and common audio content while maintaining portability with small speaker components.
3Productivity
If frequency remapping is applied to boost output volume in target frequency, then speaker efficiency is improved, but frequency response accuracy may be compromised
Solution Approach 1:
The patent applies partial action by selectively applying gain adjustments only to specific frequency ranges (the peak frequency range identified from the frequency response curve) rather than uniformly across all frequencies. This targeted approach improves speaker efficiency and output volume in the most critical frequency bands while minimizing distortion and maintaining acceptable frequency response accuracy for other frequencies.
Data Source
AI summary
A speaker's output volume is increased by obtaining, from a memory, a frequency response curve associated with a speaker. A digital signal processor determines, according to the frequency response curve, a frequency range associated with the speaker's max output volume and designates the frequency range associated with the speaker's max output volume as the target frequency. The digital signal processor remaps in real-time an audio input signal to produce an audio output, from the speaker, in the target frequency.