Device Listening is a term used to describe the use of electronic devices to listen in on conversations or other audio. This can be done through the use of earphones, which are 8-letter devices that fit over or in the EAR and allow the user to hear sound from a device such as a phone or computer. It can also be done with an EAR, which is a 3-letter device that is placed inside the EAR and amplifies sound. Finally, it can be done with a BUG, which is a 3-letter device that is hidden and used to secretly record conversations.