To hear through walls, start by finding a drinking glass with a wide rim. Then, hold the rim of the glass against the wall you want to listen through and rest your ear on the bottom of it. Sound waves will travel through the wall and into the glass, making it easier for you to hear through it!Click to see full answer. Subsequently, one may also ask, how do you use stethoscope to listen through walls?Put on a stethoscope and place the round, metal end to the wall. A stethoscope should work well as a listening device since it is designed to hear the heartbeat from within the thick chest cavity.Beside above, can listening devices hear through walls? A professional listening through wall device capable of penetrating walls up to 12 inches thick. The highly sensitive microphone and fine tuning noise buffer filter allows you to hear words on the other side of the wall, and you can even record from this clever audio listening bug thanks to a handy output socket. In this manner, how can I make my phone listen through walls? The old classic glass to the wall trick It’s a cliche, but it works. Take a stemless glass and place the open end against the wall. Any sound waves that permeate the wall will resonate inside the glass and your ear will better be able to capture and process them.How far can listening devices work?Modern listening devices can have an effective range of up to 1640 feet, though there is significant variation depending on the make, model and configuration.
