Hi myeongsuk,
To answer your question, delay plays a crucial role in accurately estimating the path for noise cancellation. When using delay in ANC, it allows for the system to account for the time it takes for sound to travel from the reference microphone to the speaker, thus enhancing the effectiveness of noise cancellation. However, excessive delay can lead to degraded performance and potential instability in the ANC system.
In many cases, the filter used in ANC systems can indeed introduce a notable amount of delay due to its processing requirements. Therefore, adding more delay should be approached cautiously, as it could further impact system performance and real-time responsiveness.
In this scenario, a technical approach would involve evaluating the trade-offs between introducing additional delay for improved path estimation and maintaining real-time operation and stability. This assessment would consider factors such as the specific ANC system requirements, desired noise cancellation performance, and computational resources available.
It is essential to highlight that the decision to use additional delay when estimating a path for ANC should be based on a thorough understanding of the system's requirements and constraints. This may involve conducting simulations or experiments to determine the optimal balance between path estimation accuracy and real-time operation.
In conclusion, while using delay can enhance path estimation for ANC, especially in accounting for signal propagation time, it is crucial to carefully weigh the implications of introducing additional delay, particularly when the filter already introduces significant latency. A professional approach would involve conducting a detailed analysis of the system's performance under different delay scenarios to make an informed decision.
