The latest sensation within the actively involved investigators is the yielding result of wall microphones, these enables one to receive audio signals through walls, glass and even steel in hard unguided situations alerting and directing correctly. Most apparatus includes exterior interior microphones, stethoscope earphones and amplifiers to deliver quality product and conduct equipped enough to pick up the lowest of voices at the other end of the wall. The handy approach of the product makes things easier further raising its demand and application. With latest advancements even remote application of the product via varied radio frequencies take it a step higher in field of progress.
Another striking feature is the ability of the products to work at a range of temperature extending from -10 degree Celsius to about 55 degree Celsius further making it applicable in almost every populated corner of the world. So all one has to do is to fix up the microphone end on the wall or concrete, plug in the earphones and monitor all audio signals leaving the place. Though their legal use is not acceptable in public in many countries and need to be inquired before use. Apart from spying these can further be applied to look for bombs, as the quality amplifiers can easily pick up the ticking pattern of the planned bombardment. Household arena is too not untouched with wall microphones and can utilise to locate any leaking pipes prior without causing any destruction to any wall finally breaking through all obstacles.