Electronic Listening Device

In order to determine if an electronic listening device may conflict with another room listening device or phone listening device, a test may be required. Complicated surveillance operations involving many room listening devices or phone listening devices always run smoothly when a short, organized test is performed.

If the operation involves the connection of an electronic listening device to a digital voice logger or a recording device, the test should include a connection of all individual receivers as well as multi-channel receivers to the input on recording device.