When a caller or callee reports hear their own delayed audio being transmitted back to them, we refer to this as call audio echo. Echo is often caused by the hardware used, positioning and volume levels of the speaker and microphone at one end of the line, or by crosstalk on copper wire (landline) networks. This guide is intended to help diagnose and resolve call audio quality issues related to echo
Below are some of the common checks we can perform
Which side of the call is reporting the issue(s): caller, callee, or both?
Was the audio echoing the entire time, or did this occur at some point in the call?
Does this issue occur at the same time each call?
Are any parties using a speakerphone, or a separate microphone and speakers?
Does this issue only occur with specific phone numbers or number types (landline, mobile, VoIP, etc.)?
Does this issue only occur when calling or receiving calls from a specific region or country?
Do other callers/callees report similar issues?
Most audio echo issues are caused by one callee or caller's microphone picking up the audio coming from the speaker, and then transmitting it back through the call. Please run through this troubleshooting checklist to try and resolve this issue:
Disable any speakerphone functionality, and instead use a headset or a phone handset.
If using a computer with speakers and a separate microphone, use a headset or phone handset instead.
Lower the output volume on the speaker or handset.
If using a separate microphone, point it away from any speakers where call audio is outputting, and point it towards the caller or callee.
reference
https://support.twilio.com/hc/en-us/articles/360022008913-Troubleshooting-Call-Audio-Echo-Issues-Twilio-Programmable-Voice-Calls
Below are some of the common checks we can perform
Which side of the call is reporting the issue(s): caller, callee, or both?
Was the audio echoing the entire time, or did this occur at some point in the call?
Does this issue occur at the same time each call?
Are any parties using a speakerphone, or a separate microphone and speakers?
Does this issue only occur with specific phone numbers or number types (landline, mobile, VoIP, etc.)?
Does this issue only occur when calling or receiving calls from a specific region or country?
Do other callers/callees report similar issues?
Most audio echo issues are caused by one callee or caller's microphone picking up the audio coming from the speaker, and then transmitting it back through the call. Please run through this troubleshooting checklist to try and resolve this issue:
Disable any speakerphone functionality, and instead use a headset or a phone handset.
If using a computer with speakers and a separate microphone, use a headset or phone handset instead.
Lower the output volume on the speaker or handset.
If using a separate microphone, point it away from any speakers where call audio is outputting, and point it towards the caller or callee.
reference
https://support.twilio.com/hc/en-us/articles/360022008913-Troubleshooting-Call-Audio-Echo-Issues-Twilio-Programmable-Voice-Calls
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