Multi-Speaker Impulse Response Measurement via Time-Zone Signal Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for measuring impulse responses from multiple speakers require sequential output of measurement sounds, leading to an increase in measurement time as the number of speakers increases, resulting in longer measurement times.
Innovation Solution
A method where multiple first measurement signals are distributed across different time zones, and a portion of each signal is copied and added to the front end to generate third measurement signals, allowing simultaneous output and collection, enabling calculation of impulse responses from multiple speakers with a single measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement sounds are output sequentially from each speaker, then measurement precision can be maintained, but measurement time increases as the number of speakers increases
Solution Approach 1:
The patent applies periodic action by creating periodic measurement signals where the same measurement signal is repeated across multiple time zones. Each speaker outputs a measurement signal that contains multiple periods, allowing the system to measure multiple speakers simultaneously by capturing their responses in different time zones within the same measurement cycle, thereby reducing total measurement time while maintaining precision
Solution Approach 2:
The patent introduces a time zone dimension by assigning different time zones to different speakers within the same measurement signal. Instead of measuring speakers one after another in a single time dimension, the system distributes measurement signals across multiple time zones simultaneously, allowing parallel measurement of multiple speakers without interfering with measurement precision
2Adaptability or versatility
If the number of speakers is increased, then system capability is improved, but the number of measurement times increases proportionally
Solution Approach 1:
The patent merges multiple measurement operations into a single measurement process by combining measurement signals for multiple speakers into one continuous signal with distinct time zones. All speakers output their measurement signals simultaneously during the same measurement operation, and the system processes all responses together, thereby maintaining measurement efficiency while supporting an increased number of speakers
Solution Approach 2:
The patent segments the measurement signal into distinct time zones, with each time zone corresponding to a specific speaker. This segmentation allows the system to distinguish and process responses from different speakers within a single measurement cycle, enabling the system to handle increased numbers of speakers without requiring additional measurement times
Data Source
AI summary
A measurement method includes generating a plurality of second measurement signals by disposing a plurality of first measurement signals corresponding to each of the plurality of speakers in respective different time zones on a time axis, generating a plurality of third measurement signals by copying a portion of a back end of each of the plurality of second measurement signals and adding the portion to a front end of each of the plurality of second measurement signals, outputting sounds according to each of the plurality of third measurement signals from each of the plurality of speakers, collecting the sounds with a microphone, and calculating a plurality of impulse responses corresponding to the plurality of first measurement signals, based on the collected sound signal collected with the microphone and the plurality of third measurement signals.