When you use your car’s built-in speakerphone feature, the speakers in the car door reverberate, sending the sounds outside of the car. Maybe don’t do this while your car is parked. Everyone in the neighborhood or store parking lot can hear your very intimate or business-related conversation.
Using the car speakers as a hands free set, I can hear every word the person on the other end of the phone is saying from about 30 metres away.
I cant hear the person sat in the car but