1. Noise are any sound that is loud and constant. $\rightarrow$ Noise is any sound that is loud and constant. 2. A unit used to measure the loud of sounds is a decibel (dB). → A unit used to measure the loudness of sounds is a decibel (dB). 3. If you experience noise polluted for a long time, you can have headaches and hearing loss. => If you experience noise pollution for a long time, you can have headaches and hearing loss.