You probably know that vehicles that can operate solely under electric power have a low-speed warning sound that it projects to let pedestrians – particularly blind or vision-impaired pedestrians – ...

The government received a number of comments both for and against driver-selectable low-speed EV sounds. Vehicles capable of operating silently are required by law to emit sounds at speeds up to 19 ...

Light is the fastest in the universe, and its speed reaches 300,000 kilometers per second. However, on the earth, the ' sonic velocity ' of about 340 meters per second is the speed barrier, and ...