Some might find those click sounds after taking a shot with a camera phone fun, while others find it annoying. Congress today is being introduced a new bill which would require camera phones to make a click or other audible noise when a phone is used to take a photo. The bill, named the Camera Phone Predator Act, would be treated as a safety requirement. Most phones do allow users the ability to change the sound it produces and can even turn it off. Obviously, the user can always silent the device so that no sound is made. If the bill is passed, the sound created by the phone needs to be audible to anyone in a “reasonable distance” of the camera phone. As stated earlier, this feature would be treated as a safety requirement. But others might find this more of a hindrance than anything else.
source: Library of Congress