In-Room Acoustic Response Smoothing Without Transient Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for improving in-room acoustic magnitude response of audio systems often compromise transient performance due to complex corrective filters and continuous application of band attenuation filters, which affect both initial and steady-state sound.
Innovation Solution
A method involving in-room acoustic magnitude response analysis to determine room resonance-induced peaks, followed by filtering a replica of the audio signal at these peaks and adding it back to the original signal, preserving the subjective impression of transient response and dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If band attenuation filters are applied continuously to correct room resonance peaks, then the in-room acoustic magnitude response is smoothed, but the transient response and dynamics of the audio system are compromised
Solution Approach 1:
The patent applies periodic action by using delayed versions of the audio signal that are activated only after the transient portion has passed. The correction filters are applied periodically to the steady-state portion of the signal while leaving the initial transient portion uncorrected, thus achieving smooth frequency response without compromising transient response characteristics
Solution Approach 2:
The patent implements preliminary action by separating the audio signal into transient and steady-state portions before applying correction. The system identifies and processes the steady-state portion with correction filters after the transient has already occurred, ensuring that transient characteristics are preserved while frequency response is corrected
2Manufacturing precision
If complex corrective filters are used to address high modal density at mid and higher frequencies, then the in-room magnitude response can be corrected, but the system complexity becomes impractical to implement
Solution Approach 1:
The patent applies segmentation by dividing the frequency spectrum into multiple bands and addressing only the problematic resonant frequencies within those bands. Rather than applying complex correction across the entire frequency range, the system segments the correction task into targeted frequency regions, significantly reducing filter complexity while maintaining correction effectiveness
Solution Approach 2:
The patent implements local quality by applying correction filters with specific characteristics only at the frequencies where room resonances occur, rather than applying uniform correction across all frequencies. Each corrective filter is tailored to address local resonant peaks, reducing overall system complexity while achieving precise magnitude response correction
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
This approach effectively smooths room resonance-induced peaks without compromising dynamic or transient performance, resulting in a more accurate and engaging audio experience.
Implementation Method 1
adding it back to the original signal, whereby smoothing the room resonance induced peak is achieved
Data Source
AI summary
A system and method are provided for smoothing the in-room acoustic magnitude response of an audio reproduction system. An in-room acoustic magnitude response analysis is performed to determine a room resonance induced peak associated with an audio signal. A replica of the audio signal is filtered at the room resonance induced peak. The filtered replica signal is added with the audio signal. Through this, smoothing of the room resonance induced peak may be achieved, such that a subjective impression of transient response and dynamics of the audio signal are preserved.