The AJ-3 has an effective jamming range of 150 sq. You can keep them in your pocket or bag and just switch them on when you are having a sensitive conversation, there is no setup necessary. How to use an audio jammer to block a listening deviceĪudio jammers like the AJ-3 are so convenient because they are super portable and battery-powered. This is exactly what we want to happen when we are trying to block listening devices, which is why audio jammers emit sounds at all frequencies. Recording artists try to make sure that instruments’ frequencies don’t overlap too much for this reason because it makes the individual instruments sound quieter. One part of the eardrum (diaphragm) vibrates for each frequency. Sometimes the frequencies of these instruments are the same when recording, so when those sounds reach our ears it is difficult to tell which is which because of the way the diaphragm in our ear vibrates. Imagine a bass drum and a bass guitar playing at the same time. You might have heard of sound engineers picking different frequency ranges for certain instruments when they are mixing a song. When the diaphragm is overloaded with white noise from an audio jammer, other sound waves, such as someone speaking in the same room, are lost in the vibration so it is very hard to pick out voices when listening to the recording. ![]() ![]() These vibrations move a magnet near a coil of wire which converts the wave energy of the sounds into changes in a small electrical current. There is a small diaphragm in every listening device which vibrates when sound waves hit it. It’s not immediately obvious to most people why this would stop a listening device from working until you take a look at how a microphone works. This means that it contains all the most bassy sounds we can hear to all of the highest pitched sounds we can hear and everything in between, at once, at whatever volume you choose. White noise is a sound that contains all the audible audio frequencies played at the same time and at the same amplitude. Some people think of white noise as static on a radio or old TV and this is nearly correct. The way these do this is by emitting white noise. When you switch on an audio jammer it masks the sound of a conversation, ruining recordings and impeding live audio surveillance. How Audio Jammers Block Listening DevicesĪudio jammers are small, usually mobile, devices designed to interfere with the way listening devices operate. Read on to find out how these devices work and how to use them. You just use a handy little device called an audio jammer. It is this last option that we will talk about in this article because it requires the least amount of effort to put into action. ![]() Transmit another sound to mask the sound.Distort the sound that reaches the device.If this is the case then your best option is to try to block the sound from reaching any listening device that might be nearby. You might also be in a space where checking for hidden microphones is not practical. You can sweep a room for listening devices as much as you like but there is just no guarantee you will find them all.
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