Acoustic Sensor

Acoustic Sensors (also known as gunfire acoustic sensors or acoustic gunfire sensors ) are security devices in Deus Ex. Acoustic sensors detect gunfire by the player and can be encountered in Hong Kong. Similar to other electronic devices, acoustic sensors can be bypassed (rendered inoperative) with the use of multitools.

Background
In 2052, acoustic gunfire sensors are been deployed by a number of organizations throughout the world in urban areas where it might otherwise be difficult to implement and maintain a pervasive security presence.

Trivia

 * The image has the prefix of 01, suggesting it was at one point meant for Liberty Island.
 * While the Hong Kong Canals have acoustic sensors they aren't hooked up to anything and are therefore useless.
 * Other unused triggers in the level suggest police may have spawned if they were activated.
 * Despite being gunfire sensors, they can be activated by flamethrowers.