Listening distance
Nowadays you can listen to a conversation from afar, or even from afar. This is possible thanks to the development of mobile phones and wireless. The mastery of listening distance promotes the trade in spy equipment on the market.
Defining the listening distance
A sound comes from a source. Listening distance is based on the distance between the listening point and the sound source. When the latter is close, the sound, measured in decibel, is distinct and audible. It decreases as you move away from the source. When it is far away, the reverberated field becomes important. And at a certain distance, the sound becomes inaudible. This is no longer the case today thanks to technical innovations. a spy pen can record a conversation between two people from several meters away.
GSM and Wireless Technology
With the introduction of new technologies such as mobile phones and wireless, the concept of listening distance is being redefined. A person with his smartphone can hear another person thousands of miles away with all the sound quality required.
Sophisticated gadgets and remote listening
Progress is such that espionage is democratized; which plays to the advantage of gadget traders in micro spy camera or camera wifi bulb. These means of listening are so discreet that the intelligence services usually use them. But they are also available on the shelves of specialty shops or online. front page pen spy camera, or a camera watch full hd can be easily concealed in ordinary objects. Who can imagine that a light bulb can be a camera light bulb? Or that the next-door neighbour is equipped with a camera scope? The mastery of the listening distance never ceases to seduce.
