Acoustic System Direct Sound Delay Prevention
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Solution Overview
Problem
Existing sound image localization techniques delay both direct and reverberation sounds during processing, making it difficult to perceive the sense of depth and spatial impression while preventing direct sound delay.
Innovation Solution
An acoustic system that includes a processor for generating a second reverberation signal through binaural and transaural processing on a first reverberation signal, with a dipole speaker emitting the reverberation sound, while a stereo speaker emits direct sound, thereby separating the processing delay from the direct sound emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sound image localization processing is performed on an acoustic signal including both direct sound and reverberation sound, then spatial impression and depth perception are improved, but direct sound delay occurs making it less natural
Solution Approach 1:
The acoustic signal is segmented into direct sound and reverberation sound components. The direct sound is emitted without processing delay through a first speaker, while the reverberation sound undergoes sound image localization processing through a second dipole speaker. This segmentation allows spatial impression enhancement for reverberation while preserving temporal accuracy for direct sound.
Solution Approach 2:
The reverberation sound component is extracted from the acoustic signal for separate processing. By isolating the reverberation sound, the system applies sound image localization processing only to this component, preventing delay of the direct sound while still achieving enhanced spatial impression through processed reverberation.
2Measurement precision
If binaural and transaural processing are applied to reverberation signal, then sense of depth and spatial impression are enhanced, but processing complexity increases
Solution Approach 1:
The signal processing is segmented into two distinct processing chains: one for direct sound (no processing) and one for reverberation sound (binaural and transaural processing). This segmentation concentrates complex processing only where needed for spatial impression enhancement, rather than applying it to the entire acoustic signal.
Solution Approach 2:
The system introduces an intermediary processing stage that takes the reverberation signal and applies binaural and transaural processing to generate a processed reverberation signal. This intermediary processing block acts as a mediator between the raw reverberation signal and the final output, enabling enhanced depth perception through controlled signal transformation.
Data Source
AI summary
An acoustic system includes: a memory storing computer-executable instructions; a processor that implements the computer-executable instructions stored in the memory to execute a plurality of tasks. The plurality of tasks includes: a first signal acquiring task that acquires an acoustic signal and a first reverberation signal representing a waveform of reverberation sound corresponding to the acoustic signal; and a second signal processing task that generates a second reverberation signal by performing binaural processing and transaural processing on the first reverberation signal. The acoustic system further includes: a first speaker configured to emit sound corresponding to the acoustic signal; and a second speaker that is a dipole speaker, the second speaker being configured to emit reverberation sound corresponding to the second reverberation signal.