The noises you hear while driving – the engine, the tires on the pavement, the wind, other drivers' vehicles – keep you aware of what is going on around you.
Never play the stereo at a volume that keeps you from hearing well.
It is illegal to wear a headset or earplugs in both ears while you drive a motor vehicle or bicycle. (CVC 27400)
People who are deaf or have other hearing impairments can learn to rely on their vision while driving to compensate for a lack of sound. These drivers may scan the area more often to see cars slowing or emergency vehicles approaching.
If your hearing feels strange, visit a doctor. If your hearing is impaired, wear your prescribed hearing aid. You may also consider installing a right-hand rearview mirror to improve your vision.