1810, member of a gang of murderers and robbers in India who strangled their victims, from Marathi thag, thak cheat, swindler, Hindi thag, perhaps from Sanskrit sthaga-s cunning, fraudulent, possibly from sthagayati (he) covers, conceals, from PIE root *(s)teg- cover (see stegosaurus).
It may also occur in one ear or both ears. The most common reason for muffled hearing is conductive hearing loss that can be caused by a variety of factors or medical conditions including a build up of ear wax and ear infections. In most cases, however, it is treatable and does not lead to permanent hearing damage.
Your listening device or room recorder should always be silent and undetectable. If someone who is in the room where your voice recorder has been set up, you do not want them to hear a small click when the recording begins.If the listening device makes any noise or is perceptible, either because it looks like an unusual object in the room or because it looks like a bug, you are in trouble.hether you plan on using a listening device to eavesdrop, in the line of duty, or to observe nature, you will need to understand the different features available on room recorders and voice recorders. The average voice recorders will come with one of these two options, or both: voice activated and continuous recording.