Handsfree

Originally introduced as optional features connected by a wire to smartphones or other communication devices, they now generally are available with wireless technology.

However, studies have shown that even with a hands-free unit, the added distraction to the driver, and the increase in crash rates, are almost as substantial as when driving and talking on a normal mobile phone.

[6] Similar laws have been adopted in many jurisdictions worldwide, and many make provisions for hands-free phone use.

There have been many ways developed to cancel echo in phone calls and results range from poor to excellent.

This situation is complicated as the software must not only remove the noise around him, but must transmit his voice clearly and loudly to whoever is connected to him.