HUSAR CT ANS sensor is designed to measure ambient noise to support adjustment of the volume level of voice announcements to the measured noise level in the zone of operation of the PA sound system. Based on the HUSAR CT ANS sensor measurements, the public address system maintains the volume of the emitted sound (announcements, information) in the zone for a specific setting. This makes it possible to make intelligible announcements at a volume level that is appropriately adjusted. The sensor measures ambient noise using a built-in microphone. All the hardweare is closed in a weatherproof housing