Complex sentence: A-weighted measurements are commonly used to determine noise levels that can cause harm to the human ear, and special exposure meters are available that integrate noise over a period of time to give an value (equivalent sound pressure level), defined by standards.
Split into simpler sentences: A-weighted measurements are commonly used to determine noise levels that can cause harm to the human ear. There are also special exposure meters available that integrate noise over a period of time to give an value (equivalent sound pressure level), defined by standards.