Companies use listening devices to spy on competing businesses and overhear confidential information. The police will often use listening devices to spy on certain suspects who they have reason to believe are involved in criminal activity. People use these kinds of devices to hear conversations from a distance so that the people who are talking do not know someone else is listening to their private communications. Can listening devices hear through walls?.How far away can listening devices hear a conversation?.We all know what listening devices are, but have you ever wondered how they work? In this article, we’ll answer the following questions about eavesdropping detection devices:
