Suspended Audio Bass Enhancement Using NLD Harmonic Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Suspended audio devices with small loudspeakers struggle to reproduce low-frequency audio below 140 Hz, leading to unsatisfactory bass performance and impacting the listening experience.
Innovation Solution
A suspended audio device with bass enhancement performance utilizing a low-pass filter, high-pass filter, energy controller, and harmonic generator, employing a Non-Linear Device (NLD) algorithm to generate enhanced harmonic signals, and an energy controller to control gain, shifting low-frequency signals to audible bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a small caliber loudspeaker is used in a suspended audio device, then the product form factor is maintained, but the low-frequency audio reproduction capability deteriorates
Solution Approach 1:
The patent replaces the mechanical approach of using a large physical loudspeaker with an electronic signal processing system. The NLD algorithm processes audio signals to generate enhanced bass output, substituting physical mechanical vibration with electronic frequency transformation and synthesis to achieve bass enhancement without requiring a large speaker driver.
Solution Approach 2:
The patent changes the frequency parameters of the audio signal through the NLD algorithm. By processing the input signal through non-linear distortion and harmonic generation, the system transforms the frequency spectrum to emphasize bass frequencies, effectively changing the spectral parameters to achieve improved low-frequency reproduction from a small speaker.
2Ease of operation
If traditional EQ adjustment is used, then the audio range of 140 Hz to 20 kHz can be adjusted, but the low-frequency band below 140 Hz cannot be reproduced
Solution Approach 1:
The patent applies preliminary signal processing through the NLD algorithm before the audio signal reaches the speaker. By pre-processing the signal to generate enhanced bass frequencies and harmonic content, the system prepares the audio signal in advance to compensate for the small speaker's limited low-frequency capability, ensuring bass enhancement is achieved before the physical limitations of the speaker become apparent.
Solution Approach 2:
The NLD algorithm acts as an intermediary between the audio source and the small loudspeaker. This intermediate processing stage transforms the input signal to include enhanced bass frequencies and harmonic content, mediating between the source material and the speaker's physical limitations to achieve improved bass reproduction.
Data Source
AI summary
Disclosed is a suspended audio device with bass enhancement performance, including a low-pass filter, a high-pass filter, an energy controller and a harmonic generator. The low-pass filter is configured to extract a low-frequency signal in an original input signal, and input the low-frequency signal as a fundamental wave of the harmonic generator; the high-pass filter is configured to extract a mid-high frequency signal in the original input signal; the harmonic generator is configured to process the low-frequency signal extracted by the low-pass filter through the NLD algorithm, and generate at least one enhanced harmonic signal in the low-frequency signal; the energy controller is configured to control an overall gain of the at least one enhanced harmonic signal generated by the harmonic generator.