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Acoustical surveillance is a form of monitoring that employs a number of sound sensitive devices to obtain audio based information regarding a subject. Acoustical surveillance involves several types of equipment that will perform the important tasks of receiving, recording, and transmitting sound data.
Acoustical surveillance is also a method of getting information about conditions under water. An example is the creation of maps and schematics of the underwater. Acoustical surveillance can also be utilized to obtain information about changes in terrain that may indicate the presence of a sunken ship or other man made device.
Acoustical surveillance is also used as a means of evaluating the performance level of employees. A sound recording is made of random phone calls made and received by an employee. The purpose of this type of surveillance is to ensure the employee is interacting with customers and prospects in a manner that is within company guidelines. Often, this application of acoustical surveillance is helpful to the employee, as it makes retraining possible, as well as helping to provide positive data that will help in securing raises and other forms of recognition in the workplace.
Acoustical surveillance is also useful in law enforcement and in private investigations. By planting listening devices that are often known as bugs, it is possible to monitor the activities of individuals who are suspected of engaging in illegal or unethical activities.