Very low audio level from EC embedded in EXI on wired headset

### Steps to reproduce

1. Amandine called me from EXI using default iPhone wired headphones for audio
2. I picked up the call on ED
3. Audio levels were very low from her; roughly 3x quieter than it should be.
4. I switched to EXI
5. Still far too quite.

### Outcome

#### What did you expect?

Audible Amandine

#### What happened instead?

Inaudible Amandine

### Operating system

_No response_

### Browser information

_No response_

### URL for webapp

_No response_

### Will you send logs?

Yes