Waive graph

[SPC]

Hi, I'm testing the response of a headphone in BT mode connection, using EARS testing devide, I'm getting a strange graph for me. Could you explain why is happening and if there is a way to solve it? The Headphone connected by cable graph is correct, oly happens if BT is connected.
Thanks in advance.

 

[John Mulcahy]

Regular nulls like that tend to indicate some feedback path is active, though I'm not sure how that could occur with the setup you are using. Other possibilities are dropouts, sample rate mismatches, some kind of effects processing being applied, or timing issues. Timing can be tackled using the acoustic timing reference, effects can be disabled in the Windows audio properties for the devices (assuming you are using Windows) and the default sample rate and format are also configured in the Windows audio properties.