What are the HW or sound limitations for the echo cancellation algorithm in SpeechSDK

Faris Lemes 70 Reputation points
2024-06-28T07:30:28.45+00:00

hi, I'm having some issues with the echo cancellation on my device, and I'm trying to use speech SDK, when I was analyzing the sounds that I record with microphone it seems that there are present higher harmonics which are 24dB less then primary harmonic, I'm not sure if this can cause the issues on the echo cancellation algorithm, and if there are some other limitations?

Azure AI Speech
Azure AI Speech
An Azure service that integrates speech processing into apps and services.
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Accepted answer
  1. navba-MSFT 20,635 Reputation points Microsoft Employee
    2024-07-11T05:12:50.7633333+00:00

    @Faris Lemes I'm glad to see you were able to resolve your issue. Thanks for posting your solution so that others experiencing the same thing can easily reference this. Since the Microsoft Q&A community has a policy that the question author cannot accept their own answer, they can only accept answers by others, I'll repost your solution in case you'd like to Accept the answer.

    .

    Issue:

    You are encountering issues with the echo cancellation on your device. You are trying to use speech SDK, when analyzing the sounds that you record with microphone it seems that there are present higher harmonics which are 24dB less then primary harmonic.

    .

    Resolution:

    You managed to identify the cause of this issue which was due to a Hardware issue with higher harmonics. You had a speaker which has 10% THD, after switching to better speaker (which does not have higher harmonics) echo cancellation worked fine.

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