Sony XAV-AX5500 Help Manual page 102

Help Guide
In-Car Receiver
XAV-AX5500/XAV-AX5550D
Echo or noise occurs during call conversations.
Reduce the volume.
Set [Speech Quality] to [Mode 1] or [Mode 2].
If ambient noise other than the phone call sound is loud, try reducing this noise.
Shut the window if road noise is loud.
Lower the air conditioner if the air conditioner is loud.
Related Topic
Available Operations During a Call
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